The cookie is used to store the user consent for the cookies in the category "Performance". In an effort to minimize the production of ammonia-containing wastes for environmental reasons, we began to investigate alternative processes for the production of similar zinc oxide-based sorbents using other non-ammonia based hydroxides and carbonates of alkali metals. Spedizione gratuita . RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER, Free format text: When they react with acids, they form salt molecules and water. bishop wayne t jackson daughter; is zinc oxide a base or alkali. 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. Batches of sorbent were produced in-house using the general lab-scale production procedure above. preparative gas chromatography, Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04, Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite, Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties, 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 physical properties, Sorbent size or size distribution, e.g. The United States Government has certain rights in the invention. Ans: Typically they are metal oxides, metal hydroxides, metal carbonates and carbonates of molten hydrogen. Accordingly, this process allows small amounts of zinc oxide to be highly dispersed throughout the sorbent, providing high reactivity. According to this process, an aqueous slurry containing a mixture of precursors of zinc oxide and alumina, is spray dried to form precursor sorbent particles of a desirable size, and the precursor particles are thereafter calcined to convert the precursors into the two-phase (zinc oxide and zinc aluminate) active zinc component. 8: The eighth difference between alkali and base is that Alkalis react exothermically with organic materials causing them to burn up when added to the mixture resulting in black smoke from burning organic particles or charring it bath its surface layer leading to further destruction. For example, NaOH, KOH, etc. CONFIRMATORY LICENSE (SEE DOCUMENT FOR DETAILS). Metals Zinc, Tin, Lead, Aluminium, Beryllium form amphoteric oxides or hydroxides). Zinc oxide is a chemical compound having the chemical formula ZnO. 23. 6,951,635 discloses that the preferred zinc oxide and alumina precursors were Zn(NO. PbO2reacts with hydrochloric acid so, it is basic. 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. The active zinc component is a two-phase material, consisting essentially of a zinc oxide (ZnO) phase and a zinc aluminate (ZnAl. They are feeling soapy, sour and corrosive. pH & conductivity meter, model: HACH, HQ40d, Two Masterflex L/S with Easy-Load II peristaltic pumps, Weigh the metal salts (amount list in the table) and place them in a 4 L beaker. NON FINAL ACTION MAILED, Free format text: State and explain whether zinc oxide is a base, an alkali, or both.. 11. U.S. Pat. The process of claim 25, wherein the formation of the first slurry is performed at a temperature of about 65 C to about 75 C. 2 it can be seen that the inherent pH of the zinc oxide suspension at pH=7.2 is very stable. Included with the highly-mixed precipitated phases are the soluble alkali metal salts that are formed during the precipitation process. In a preferred embodiment of U.S. Pat. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. Free format text: Zinc Hydroxide is a weak base. Ans: The word, free caustic al-kali, is usually defined as free NaOH; while total free alkali includes free caustic al-kali and additional alkaline sub-stances other than soap, mainly sodium carbonate and silicate. Basically, they are both aqueous solutions. 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. Preferably the spray drying conditions are adjusted to provide green spray dried particles of a size such that at least 80 percent by volume of the particles have a diameter between 50 and 255 m. 19. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. 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. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Calcined batches were combined and screened to obtain particles in the range of 25-150 m. The process of claim 14, wherein said additional material is present in amount selected to provide fluidizable, attrition resistant, active zinc oxide containing sorbent particles containing at least about 90 wt% of said two-phase components consisting essentially of a zinc oxide phase and a zinc aluminate phase. Nevertheless, as long as the modified precursor, (or precursors), is readily convertible to the final oxide product(s) by calcination, such modification does not interfere with formation of the sorbent. More recently, our group has reported zinc oxide loaded with alkali metal as an effective heterogeneous basic catalyst for soybean oil transesterification [17]. Alkali metal oxides are also bases and when dissolved in water, they form an alkaline solution. This application claims the benefit of 62/540,028 filed Aug. 1, 2017, Jian-Ping Shen et al., Atty. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). The cookie is used to store the user consent for the cookies in the category "Analytics". 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 cookie is set by GDPR Cookie Consent plugin. In preferred embodiments, the attrition resistant, zinc oxide-based sorbent compositions of the disclosure have a compacted bulk density exceeding 1 g/cm, According to another aspect, the present disclosure provides a process for preparing attrition resistant, zinc oxide-based sorbent compositions by converting a mixture of precipitated zinc oxide and aluminum oxide precursors to the two-phase, active zinc component using alkali metal hydroxides or alkali metal carbonates. 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. These precipitated zinc oxide precursors and precipitated alumina precursors included, for example, hydroxides. It reacts with both acids and bases to form salts. Alkalis are characterized by their ability to neutralize acids and form metal oxides when reacting with water. 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. Preferably, the total dry solids content of such materials, based on adjusted weight, is less than about 25 wt %, more preferably less than about 20 wt %, even more preferably less than about 10 wt %, most preferably, less than about 5 wt %. 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. Dkt. Zinc Nitric -> Zinc + Water No. Unless expressly stated otherwise, all weight percentages are calculated and expressed based on the adjusted weight of the sorbent components and compositions. 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. For example, zinc oxide acts as an acidic oxide when it reacts with concentrated sodium hydroxide. . Advantageously, the aluminum oxide intermediate, calculated as Al, The present disclosure additionally includes preferred processes for removing sulfur contaminants from a warm gas employing the zinc-oxide based sorbents of the disclosure. Advantageously the slurry is spray dried into a conventional, heated zone which is heated by a feed gas provided at a temperature sufficient that outlet gasses from the spray drying chamber have a temperature above about 265 F. (129 C.). . Heat metal salt solution to 50-70 C., and maintain this temperature for the duration of the co-precipitation reaction. By way of example, an element means one or more elements. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. calcining said spray dried particles to provide fluidizable, attrition resistant, active zinc oxide containing sorbent particles comprising a two-phase component consisting essentially of a zinc oxide phase and a zinc aluminate phase. Venditore professionale. The terms about and approximately may be used interchangeably. It is an inorganic compound. Binders and inert refractory inorganic oxides can include naturally occurring clays, calcium sulfate, silicas, titanias, aluminosilicates, aluminates, zeolites and the like. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Zinc oxide (when it is slightly dissoved in water) is a base but ALSO an acid, though very weak. Small amounts of these salts remain after the precipitation liquor is removed. They produce salt molecules and water by reacting with acids. While both terms refer to compounds that can neutralize acids, they have distinct properties and characteristics. Preferably the sorbents are prepared by using an alkali metal base to convert a precursor mixture, containing a precipitated zinc oxide precursor and a . In addition, the high surface area and preferred uniform mixing of the precursors allows the formation of zinc aluminate using less harsh calcinations conditions than are required by conventional zinc aluminate forming processes which involve a solid-state reaction between alumina and zinc oxide. 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. No. 13. Electron vs beta particle, What is Difference Between Sodium and Salt? Examples of bases include copper oxide (CuO), zinc oxide (ZnO), and ammonia (NH3). These cookies track visitors across websites and collect information to provide customized ads. The active zinc component is a two-phase material, consisting essentially of a zinc oxide (ZnO) phase and a zinc aluminate (ZnAl. Zinc Sulphate is acidic. Test your knowledge on difference between alkali and base! It is further noted that the claims may be drafted to exclude any optional element. particle shape, diameter, Characterization of reaction between zinc oxide and hydrogen sulfide, Stability of zinc oxide high-temperature desulfurization sorbents for reduction, Zinc oxide-based adsorbents using alkali metal hydroxides and methods for making and using them, Zinc oxide-based adsorbent using alkali metal hydroxide, and its preparation and use process, Zinc oxide-based adsorbents using alkali metal hydroxides, and processes for making and using the same, Zinc oxide based sorbent and process for preparing same, Zinc oxide-based sorbents and processes for preparing and using same, Silicate-resistant desulfurization sorbent, Process for preparing zinc oxide-based sorbents, Improvements in or relating to the treatment of gases containing sulphur, Desulfurizing agent and method for regenerating same, PROCESS FOR PREPARING A CATALYST BASED ON ZINC ALUMINATE AND CATALYST OBTAINED, For from gaseous hydrocarbon remove sulphur compound catalyst composition, manufacture their method and uses thereof, A kind of zinc oxide material and preparation method containing gahnite, Zinc oxide-based sorbents and process for preparing and using same, Composition useful as sulfur absorption for fluid streams, Method for preparing nanometer calcium carbonate slurry by using waste gypsum as calcium sources, products and application, A kind of middle low temperature SCR denitration titanium molybdenum composite powder and preparation method thereof, TiO2 nanotube-supported V2O5 catalysts for selective NO reduction by NH3, NO x removal by selective catalytic reduction with ammonia over hydrotalcite-derived NiTi mixed oxide, Regenerable sorbents for removal of sulfur from hydrocarbons and processes for their preparation and use, Method for preparing adsorption material and method for extracting lithium from salt solution by using adsorption material, Method for preparing modified attapulgite sulfur-transfer additive, Manganese oxide-based and metallomanganese oxide-based ion-exchangers for removing mercury (+2) ions from liquid streams, A kind of preparation method of micron order tin dioxide powder, Protective agent for methanol synthesis catalyst, and preparation method and application thereof, Method for producing oxide using beta-manganese dioxide, Influence of monovalent cations and CuO nanoparticles on X-nanozeolite in uranium anionic species separation from contaminated drinking water, Zinc oxide desulfurizer containing zinc-aluminum spinel, Multiple activation mechanisms of CaO-based sorbents promoted by pre-sintering-hydration, Effect of Metal Components on NO Removal Performance of Modified High-Content Iron Fly Ash, Adsorbent and method for producing the same, Ep: the epo has been informed by wipo that ep was designated in this application. Find notes, question papers for other subjects like Mathematics, Physics, Biology and various competitive exams as well. ); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY, UNITED STATES DEPARTMENT OF ENERGY, DISTRICT OF COLUMBIA, CONFIRMATORY LICENSE;ASSIGNOR:RESEARCH TRIANGLE INSTITUTE;REEL/FRAME:055029/0922, APPLICATION DISPATCHED FROM PREEXAM, NOT YET DOCKETED, DOCKETED NEW CASE - READY FOR EXAMINATION, RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER, NOTICE OF ALLOWANCE MAILED -- APPLICATION RECEIVED IN OFFICE OF PUBLICATIONS, RESEARCH TRIANGLE INSTITUTE, NORTH CAROLINA, 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, PUBLICATIONS -- ISSUE FEE PAYMENT RECEIVED, AWAITING TC RESP, ISSUE FEE PAYMENT VERIFIED, PUBLICATIONS -- ISSUE FEE PAYMENT VERIFIED, Zinc oxide-based sorbents using alkali metal hydroxides and processes for preparing and using same, Improvements in or relating to the treatment of gases containing sulphur, Desulfurizing agent and method for regenerating same, PROCESS FOR PREPARING A CATALYST BASED ON ZINC ALUMINATE AND CATALYST OBTAINED, Zinc oxide-based sorbents and processes for preparing and using same, Silicate-resistant desulfurization sorbent, For from gaseous hydrocarbon remove sulphur compound catalyst composition, manufacture their method and uses thereof, A kind of zinc oxide material and preparation method containing gahnite, Zinc oxide-based sorbents and process for preparing and using same, Composition useful as sulfur absorption for fluid streams, A kind of middle low temperature SCR denitration titanium molybdenum composite powder and preparation method thereof, TiO2 nanotube-supported V2O5 catalysts for selective NO reduction by NH3, Method for preparing adsorption material and method for extracting lithium from salt solution by using adsorption material, Method for preparing modified attapulgite sulfur-transfer additive, Manganese oxide-based and metallomanganese oxide-based ion-exchangers for removing mercury (+2) ions from liquid streams, A kind of preparation method of micron order tin dioxide powder, A novel process for comprehensive utilization of vanadium slag, Influence of monovalent cations and CuO nanoparticles on X-nanozeolite in uranium anionic species separation from contaminated drinking water, Multiple activation mechanisms of CaO-based sorbents promoted by pre-sintering-hydration, Layered manganese oxide molded product and manufacturing method thereof, High-temperature flue gas desulfurizer and preparation method thereof, Adsorbent and method for producing the same, Hydrotalcite-phase crystalline compound and process of manufacturing thereof using hydrotalcite former, Information on status: patent application and granting procedure in general. 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