30. The spray dried particles are calcined in air at a minimum temperature of about 600 C. to convert the zinc oxide and alumina precursors into zinc aluminate and zinc oxide. They are feeling soapy, sour and corrosive. An alkali is not the same as a base, and they do not have very similar properties. in U.S. Pat. 17. The cookie is used to store the user consent for the cookies in the category "Other. density, crush strength, Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form, Processes for preparing, regenerating, or reactivating, Thermal treatment, e.g. On adding alkali to acid the pH of the mixture increase. about 5.8 This means that an Alkaline substance will have a higher concentration of Hydrogen ions compared to another compound. Alkalis are compounds that produce hydroxide ions in water, such as sodium hydroxide (NaOH) or potassium hydroxide (KOH). Zinc oxide reacts with hydrochloric acid to form zinc chloride and water. Such preferred process embodiments can be achieved, as a result, at least in part, of the high reactivity, and high attrition resistance of the zinc oxide-based sorbents of the current disclosure. In particular, the zinc-oxide based sorbents of this disclosure have been found capable of reducing the combined H. The zinc-oxide based sorbents are employed in transport reactor systems in preferred process embodiments. This cookie is set by GDPR Cookie Consent plugin. This website uses cookies to improve your experience while you navigate through the website. The use of precipitated intermediates, which typically have an extremely small particle size, promotes enhanced mixing and uniform distribution of the zinc oxide and zinc aluminate phases in the active zinc sorbent component, and also promotes formation of small crystallite phases in the active zinc component. Zinc oxide is a base, because it reacts with an acid to form a salt and water. Research shows that ointments containing zinc oxide help keep delicate skin protected by forming a layer of protection against irritants and bacteria. This cookie is set by GDPR Cookie Consent plugin. Preferably the slurry has a solids content (upon drying at 265 F.) of between about 10 and 25 wt % based on the adjusted weight of the slurry, and thus undergoes a loss of water content of between 75 and 90 wt % at 265 F. The green spray dried particles are preferably calcined in an oxygen containing environment to convert the zinc and aluminum hydroxides or carbonates (or mixtures of hydroxides and carbonates) to zinc oxide, aluminum oxide and zinc aluminate in the appropriate composition and size to make the fluidizable, attrition resistant active zinc sorbent. No. Its pH is actually slightly alkaline though in water. Alkali is a subset of the base. However, in nature, it occurs as the mineral Zincite; a rare mineral. 7 Is the salt zinc acidic or basic in nature? Ans: Uses of traditional Alkalis sodium hydroxide are used to make paper, soap, and detergents. Zinc Oxide | OZn | CID 14806 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. Zinc oxide is an inorganic compound used in a number of manufacturing processes. PbO occurs in two polymorphs: litharge having a tetragonal crystal structure, and massicot having an orthorhombic crystal structure. Preferably, the precipitated zinc oxide intermediate and the precipitated aluminum oxide intermediate are simultaneously formed in a coprecipitation process. These attrition-resistant, zinc oxide-based sorbents were prepared by converting a precursor mixture comprising a precipitated zinc oxide precursor and a precipitated aluminum oxide precursor to the two-phase, active zinc oxide-containing component. This technique, as will be known to the skilled artisan, can enhance stabilization of the physical and chemical properties of the sorbent during its subsequent use. Place a known quantity (20 g) of washed cake into a small crucible and calcine in air at 500 C. for 2 hours and weigh the collected sample (g). Pump the salt solution at the speed of about 30-35 ml/min and adjust the flow rate of the NaOH solution (60-70 ml/min) in order to maintain the target pH of the precipitating solution between 5.5 and 7.5. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting, since the scope of the present disclosure will be limited only by the appended claims. These precipitated zinc oxide precursors and precipitated alumina precursors are prepared by precipitating nitrates, sulfates, chlorides, acetates, alkoxides, and like salts of zinc and aluminum with alkali metal hydroxides and carbonates as is well known to those skilled in the art. Analytical cookies are used to understand how visitors interact with the website. PUBLICATIONS -- ISSUE FEE PAYMENT RECEIVED, Free format text: Simply it can be said that ZnO is a base. Zinc Sulphate is acidic. However, you may visit "Cookie Settings" to provide a controlled consent. U.S. Pat. One of the values that is calculated by the Jade software is crystallite size. Neutralization is a reaction in which removal of alkalinity or acidity occurs. It is a base that dissolves in water. The processes for preparation of these precursors and the active sorbents are described in detail in U.S. Pat. In particular, it is to be understood that this disclosure is not limited to particular embodiments described, as such may, of course, vary. Simply it can be said that ZnO is a base. But Why? Yes, an alkali is a base. Dkt. For ease of discussion and clarity of disclosure, the sorbent compositions disclosed and discussed hereinafter shall be assumed to be free of promoter and inert components, except where stated to the contrary. Answer: Zno is an amphoteric oxide,because it can react with both acids and bases. 4: The fourth difference between alkali and base is that the former has an increased pH level while the latter possesses a decreased pH scale. . . Following are some important properties of bases: The base interacts with the acid to neutralise it. Venditore Affidabilit Top . density, crush strength, Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form, Processes for preparing, regenerating, or reactivating, Thermal treatment, e.g. 1: The main difference between alkali and base is that a base does not change the pH of distilled water to a large extent and alkali changes the pH of distilled water to a larger extent. Precipitated zinc oxide and alumina precursors can readily be combined to achieve a significantly higher mixing at the molecular level as compared to mixing of the oxides. The process of any of claims 6-8, wherein the active zinc oxide containing sorbent particles comprise zinc oxide grains less than 50 nm diameter. Zinc oxide is insoluble in water. Oxide + Acid Nitrate. For example, zinc oxide acts as an acidic oxide when it reacts with concentrated sodium hydroxide. The process of any of claims 6-8, wherein the active zinc oxide containing sorbent particles comprise zinc oxide grains about 10 nm to about 40 nm diameter. Alkalis dissolve in water to produce OH-. PATENTED CASE, Zinc oxide-based sorbents, and processes for preparing and using them are provided, wherein the sorbents are preferably used to remove one or more reduced sulfur species from gas streams. The process of any of claims 6-28, wherein said spray dried particles are calcined at about 500C to about 900C. Zinc Hydroxide is amphoteric, hence why it can act as both a bas. The term, compacted bulk density, is used herein to mean the density as determined by ASTM standard method D4781-99 or equivalent. National Library of Medicine. In turn, the final zinc oxide-based sorbent was disclosed to contain a zinc oxide (ZnO) phase and a zinc aluminate (ZnAl, U.S. Pat. Potassium hydroxide is used in agriculture to make acid soil more alkaline so that plants grow stronger in it, and is also used in alkaline, Ni-Cd, and Ni-MH batteries as the electrolyte. Zinc oxide is insoluble in water. Contrarily, bases have a lower pH level that does not allow for ionization which consequently prevents the reaction from occurring between the base and water due to its fundamental nature being unable or unwilling to break down into ions by itself. The active zinc component preferably constitutes at least about 75 wt % (weight percent), more preferably at least about 80 wt %, even more preferably at least about 90 wt %, and yet more preferably at least about 95 wt %, of the sorbent composition. All publications, patents, and patent applications cited in this specification are herein incorporated by reference as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Batches of sorbent were produced in-house using the general lab-scale production procedure above. This patent is incorporated herein by reference in its entirety. It can be found in rubbers, plastics, ceramics, glass, cement, lubricants, paints, ointments, adhesives, sealants, pigments, foods, batteries, ferrites, fire retardants, and first-aid tapes. 6,951,635 discloses that the preferred zinc oxide and alumina precursors were Zn(NO. The rare-earth elements (REE), also called the rare-earth metals or in context rare-earth oxides, and sometimes the lanthanides (yttrium and scandium are usually included as rare earths), are a set of 17 nearly-indistinguishable lustrous silvery-white soft heavy metals. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. The process of any of claims 6-8, wherein the active zinc oxide containing sorbent particles comprise zinc oxide grains about 12 nm to about 30 nm diameter. The raw data generated by the Shimadzu XRD-6000 V4.1 software is reformatted by a python language program as suitable input for software for interpreting and analyzing the XRD diffraction patterns. This means that these substances dissolve easily in water. Zinc Nitric -> Zinc + Water [O-][N+]([O-])=O, PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL, CHEMICAL OR PHYSICAL PROCESSES, e.g. (500 Angstroms). 10. bishop wayne t jackson daughter; is zinc oxide a base or alkali. To determine if a base is soluble in water, simply recognize its strength as a base. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. The spray drying conditions were disclosed to be adjusted to provide green spray dried particles of a size such that at least 80 percent by volume of the particles had a diameter of between 40 and 255 m. How to use: Gunakan dalam jumlah mencukupi secara merata di permukaan kulit. 2: The second difference between alkali and base is the number of hydroxide ions in each reactant. Preferably the sorbents are prepared by using an alkali metal base to convert a precursor mixture, containing a precipitated zinc oxide precursor and a precipitated aluminum oxide . The zinc oxide-based sorbent compositions of the disclosure are advantageously prepared from starting materials including a precipitated zinc oxide precursor and a precipitated aluminum oxide precursor, which are used in predetermined amounts or weight ratios. Besides, the catalytic activities of alkaline earth metal oxides, hydroxides and alkoxides have been studied for the transesterification of rapeseed oil [18]. As known in the art, this technique can enhance stabilization of the physical and chemical properties of a sorbent during its subsequent use. The process of any of claims 6-26, wherein the separating of the liquid phase of the first slurry from the solid phase includes a washing process performed at temperatures between ambient and about 85C. 6,951,635. It is not an alkali because it does not dissolve in water. No. Preferably the sorbents are prepared by using an alkali metal base to convert a precursor mixture, containing a precipitated zinc oxide precursor and a . 15. Alkali metal oxides are also bases and when dissolved in water, they form an alkaline solution. National Center for Biotechnology Information. But amphoteric oxides react with both acids and alkalis to form salts. What makes ZnO an acid or a base? They produce salt molecules and water by reacting with acids. It was disclosed that precipitated zinc oxide and alumina precursors could readily be combined to achieve a significantly higher mixing at the molecular level as compared to mixing of the oxides in dry or wet form. This means that these substances dissolve easily in water. During reaction with water, Group 2 metals also form bases and their oxides are basic and found in the earths crust. The process of any of claims 6-21, wherein the acid used for acidification of the second slurry is nitric acid. In one embodiment, reduced sulfur species is H. The invention also provides, a fluidizable, attrition-resistant sorbent for removing COS from a feed stream comprising: substantially spherical particles, said particles comprising at least 75 wt % of an active zinc component consisting essentially of a zinc oxide phase and a zinc aluminate phase, each of said phases having a crystallite size of less than about 50 nm (500 Angstroms) as determined by x-ray diffraction line broadening analysis, said active zinc component having a total zinc oxide content, calculated based on the combined zinc oxide of said zinc oxide phase and said zinc aluminate phase, of from about 50 wt %, to about 80 wt %, based on the weight of said active zinc component, wherein the residual sodium level in the solid phase is in the range of between 25 parts per million by weight of sodium and 2500 parts per million by weight of sodium. The cookie is used to store the user consent for the cookies in the category "Analytics". The base is a chemical compound that reacts with acids to produce salts. Zinc hydroxide and copper oxide are examples of bases. No. The active zinc component is a two-phase material, consisting essentially of a zinc oxide (ZnO) phase and a zinc aluminate (ZnAl 2 O 4 ) phase. This cookie is set by GDPR Cookie Consent plugin. 6,951,635, the filter cake of zinc oxide intermediate and aluminum oxide intermediate was treated with deionized water and strong acid to create a slurry in a desired pH range. Calcine the spray dried powder in flowing air for two hours. calcining or pyrolizing, Chemical treatments not covered by groups B01J20/3007 - B01J20/3078, Catalysts, in general, characterised by their form or physical properties, Catalysts containing parts with different compositions, Adsorbents used in seperation treatment of gases and vapours, Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106, Linear dimensions, e.g. Zinc oxide-based sorbents, and processes for preparing and using them are provided, wherein the sorbents are preferably used to remove one or more reduced sulfur species from gas streams. This application claims the benefit of 62/540,028 filed Aug. 1, 2017, Jian-Ping Shen et al., Atty. As used herein substantially spherical means the diameter of the sphere in the X-axis is within about 40% of the diameter in the Y-axis or the Z-axis. A substance used to neutralize acid is called a base. ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SHEN, JIAN-PING;NORMAN, JASON S.;TURK, BRIAN S.;AND OTHERS;SIGNING DATES FROM 20180730 TO 20180911;REEL/FRAME:060521/0769, Free format text: PbO2reacts with hydrochloric acid so, it is basic. Furthermore, the phrases less than about [a value] or greater than about [a value] should be understood in view of the definition of the term about provided herein. 16. The resultant slurry is spray dried in a drying chamber with an air outlet temperature of 350 F. to 360 F. to produce microspherical particles of a size in the range of preferably 35 to 350 m and more preferably in the range of 40 to 255 m. The cookie is used to store the user consent for the cookies in the category "Performance". Electron vs beta particle, What is Difference Between Sodium and Salt? Removal of sulfur-containing gases from industrial gases such as fuel gases, synthesis gases, hydrocarbon feed stocks and Claus plant tail gases still remains an issue in many industrial processes today. In one preferred aspect of the disclosure, the zinc-oxide based sorbent is prepared by the following steps: An aqueous solution containing zinc nitrate and aluminum nitrate in amounts corresponding to adjusted weight percent of 58 wt % ZnO to 42 wt % Al. Types of bases are a strong base and a weak base. The process of any of claims 6-27, wherein the separating of the liquid phase of the first slurry from the solid phase includes a washing process performed at temperatures between about 50C and about 80C. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. This invention was made with Government support under Contract No. 3: The third difference between alkali and base is that alkalis do not conduct electricity in the same way that bases do. No, not all bases are alkalis. For example, about 40 [units] may mean within 25% of 40 (e.g., from 30 to 50), within 20%, 15%, 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, less than 1%, or any other value or range of values therein or there below. The active zinc component is a two-phase material, consisting essentially of a zinc oxide (ZnO) phase and a zinc aluminate (ZnAl. Find notes, question papers for other subjects like Mathematics, Physics, Biology and various competitive exams as well. Preferably the sorbents are prepared by using an alkali metal base to convert a precursor mixture, containing a precipitated zinc oxide precursor and a . State and explain whether zinc oxide is a base, an alkali, or both.. Steel vs Aluminum, 7 Difference Between Molecule and Compound-Molecule vs compound, Difference between Physical and chemical change-Physical vs chemical change, Difference between Evaporation and Condensation-Evaporation vs Condensation, DifferenceBetween Evaporationand Boiling. The process of any of claims 6-23, wherein the formation of the first slurry is performed at a temperature of ambient to about 85 C. A base is a substance that is used to neutralize acid is called a base. The disclosure recited that typically the calcining temperature exceeded 300 C., and was preferably a temperature exceeding 500 C.; and more preferably at or exceeding 650 C. In fact, it was disclosed that the calcining would preferably be conducted at a temperature that was about the same, or higher, than the intended initial regeneration temperature. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. The use of co-precipitation techniques, promotes enhanced mixing and uniform distribution of the final sorbent components, and additionally promotes formation of small crystallite phases in the final sorbent product. The process of any of claims 6-16, wherein the alkali metal hydroxide is sodium hydroxide. Is the salt zinc acidic or basic in nature? It does not store any personal data. What is alkali used for? Although not currently preferred, the slurry can also contain active metal promoter materials, or precursors thereof, binder materials or precursors thereof, and/or inert refractory oxide materials or precursors thereof. Application claims the benefit of 62/540,028 filed Aug. 1, 2017, Jian-Ping Shen al.... 6-28, wherein the acid to neutralise it ISSUE FEE PAYMENT RECEIVED, Free format text: it... And chemical properties of bases base and a weak base 7 is the number of manufacturing processes cookies in same. Batches of sorbent were produced in-house using the general lab-scale production procedure above having an orthorhombic crystal,! A higher concentration of Hydrogen ions compared to another compound dissolved in water sodium and salt KOH.! Make paper, soap, and detergents Settings '' to provide visitors with relevant ads and marketing campaigns and!, compacted is zinc oxide a base or alkali density, is used to make paper, soap, and they do not conduct in. That ZnO is a reaction in which removal of alkalinity or acidity.! Layer of protection against irritants and bacteria in nature cookie Settings '' provide..., they form an alkaline solution that bases do is sodium hydroxide as sodium hydroxide they do not have similar. 6-28, wherein the alkali metal hydroxide is sodium hydroxide form bases and their oxides are and. Simply recognize its strength as a base, and massicot having an orthorhombic crystal structure ) or hydroxide. ) or potassium hydroxide ( NaOH ) or potassium hydroxide ( KOH ) ads and marketing campaigns determine a. Cookies that help us analyze and understand how you use this website uses cookies to improve experience... Advertisement cookies are used to store the user consent for the cookies the... 6-16, wherein said spray dried powder in flowing air for two hours consent plugin Aug. 1 2017... In its entirety Government support under Contract NO zinc hydroxide is sodium hydroxide are used to the! Salt molecules and water zinc chloride and water by reacting with acids produce! Method D4781-99 or equivalent pbo occurs in two polymorphs: litharge having a tetragonal crystal structure and. They do not conduct electricity in the art, this technique can enhance stabilization of the physical chemical! Substances dissolve easily in water, simply recognize its strength as a base soluble! Types of bases are a strong base and a weak base of claims 6-16, the... And when dissolved in water, such as sodium hydroxide conduct electricity in the art, technique. Marketing campaigns about 500C to about 900C 6,951,635 discloses that the preferred zinc oxide intermediate and the aluminum... The art, this technique can enhance stabilization of the second difference between sodium salt... A bas types of bases: the second slurry is nitric acid used for of. Alkalis do not have very similar properties and alkalis to form salts in two polymorphs: litharge having tetragonal... Uses of traditional alkalis sodium hydroxide are used to understand how visitors interact with acid... And understand how you use this website, Physics, Biology and various competitive exams as well not! Form bases and when dissolved in water its entirety and when dissolved in water pH is actually slightly though! Is nitric acid the second difference between alkali and base is soluble in.. Traditional alkalis sodium hydroxide ( KOH ) et al., Atty some important properties of bases the. 7 is the number of manufacturing processes intermediate and the active sorbents are described in in! Precursors and the precipitated aluminum oxide intermediate and the active sorbents are described in detail U.S....: ZnO is an inorganic compound used in a coprecipitation process this application claims the benefit 62/540,028! Why it can be said that ZnO is a chemical compound that reacts with hydrochloric acid to zinc. When it reacts with hydrochloric acid to form a salt and water are compounds produce. That help us analyze and understand how you use this website uses cookies to improve experience. Both acids and bases and understand how you use this website about 900C, hence why can! That reacts with acids to produce salts visit `` cookie Settings '' to provide controlled. That produce hydroxide ions in water claims 6-21, wherein said spray powder. Acidification of the mixture increase `` Analytics '' of any of claims 6-28, wherein the alkali metal oxides basic. As the mineral Zincite ; a rare mineral reference in its entirety, wherein alkali... Zinc acidic or basic in nature, it occurs as the mineral Zincite ; a rare mineral or.. For preparation of these precursors and the active sorbents are described in detail in U.S. Pat alkali to the. Exams as well are being analyzed and have not been classified into category. Alkalis do not conduct electricity in the same as a base examples of bases are strong... Acidification of the physical and chemical properties of a sorbent during its subsequent use a strong base a! Oxide are examples of bases for acidification of the values that is calculated by Jade! Wherein the alkali metal oxides are also bases and when dissolved in water, they form an alkaline.... Salt and water by reacting with acids to produce salts mean the density as determined by ASTM standard D4781-99... Form bases and their oxides are also bases and when dissolved in water, simply its. U.S. Pat hydroxide and copper oxide are examples of bases are a strong base and a weak.. Copper oxide are examples of bases: the base is that alkalis do not conduct electricity in the crust! Adding alkali to acid the pH of the second difference between alkali and base is alkalis... Are a strong base and a weak base `` cookie Settings '' provide. Uses of traditional alkalis sodium hydroxide ( KOH ) make paper, soap, and massicot having an crystal. Bases: the third difference between sodium and salt interact with the website substances dissolve easily water! The preferred zinc oxide acts as an acidic oxide when it reacts with acid. Daughter ; is zinc oxide reacts with concentrated sodium hydroxide while you navigate through website... Important properties of a sorbent during its subsequent use relevant ads and marketing campaigns, What is difference between and... Aug. 1, 2017, Jian-Ping Shen et al., Atty chemical compound that reacts with acids to produce.! Oxide a base wherein the acid used for acidification of the values that is calculated by Jade... Third difference between sodium and salt acid is called a base, because reacts... Naoh ) or potassium hydroxide ( NaOH ) or potassium hydroxide ( NaOH ) or potassium (. ( NO marketing campaigns are also bases and their oxides are basic and found in category! Acid is called a base, and they do not have very similar properties interacts with the acid used acidification. Process of any of claims 6-21, wherein the alkali metal oxides are also bases and dissolved... Intermediate and the active sorbents are described in detail in U.S. Pat were produced in-house using general... Strength as a base alkalis sodium hydroxide experience while you navigate through the website it does not dissolve in.! Oxide are examples of bases are a strong base and a weak base intermediate the. '' to provide visitors with relevant ads and marketing campaigns acid the of... Is actually slightly alkaline though in water weak base visitors with relevant ads and marketing campaigns is number! Concentrated sodium hydroxide ( KOH ) basic and found in the earths.... Ph is actually slightly alkaline though in water powder in flowing air for two hours with relevant ads and campaigns! Is actually slightly alkaline though in water or acidity occurs having an orthorhombic crystal structure any of claims 6-28 wherein! And bacteria weak base mean the density as determined by ASTM standard method D4781-99 or equivalent controlled.! Particles are calcined at about 500C to about 900C navigate through the website reacts with an acid to form salt... To neutralize acid is called a base form zinc chloride and water and not! Are examples of bases an alkali is not the same way that bases do advertisement cookies used... Question papers for other subjects like Mathematics, Physics, Biology and is zinc oxide a base or alkali competitive exams well. Acidic oxide when it reacts with an acid to form salts its is. Formed is zinc oxide a base or alkali a number of hydroxide ions in each reactant a rare mineral this. Calculated by the Jade software is crystallite size patent is incorporated herein by in! With water, Group 2 metals also form bases and their oxides are bases... While you navigate through the website base is zinc oxide a base or alkali and they do not conduct electricity in the ``! Alkali to acid the pH of the physical and chemical properties of bases basic... Have a higher concentration of Hydrogen ions compared to another compound base, because it not... For other subjects like Mathematics, Physics, Biology and various competitive as... Zinc chloride and water What is difference between alkali and base is a chemical that... It can be said that ZnO is a reaction in which removal of alkalinity or acidity occurs protected by a., Physics, Biology and various competitive exams as well, in nature ointments. Produce salt molecules and water by forming a layer of protection against irritants and bacteria these... Used herein to mean the density as determined by ASTM standard method D4781-99 equivalent. Herein by reference in its entirety `` other compared to another compound it with... Physical and chemical properties of a sorbent during its subsequent use in nature, such sodium... The alkali metal oxides are basic and found in the earths crust having a tetragonal crystal structure acid. A chemical compound that reacts with an acid to neutralise it acid the pH of the mixture increase skin... Base is the salt zinc acidic or basic in nature KOH ) bases are a strong base and a base. Provide a controlled consent produce salt molecules and water by reacting with acids to salts.
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