Abstract: The present invention relates to fluorinated surfaces which exhibit sufficient hydrophilicity and sufficient electropositivity to bind DNA from a suspension containing DNA and permit elution of the DNA from the surface. Generally, the hydrophilic and electropositive characteristics are expressed at the fluorinated surface. Preferred fluorinated surfaces of the present invention include fluorinated Al(OH).sub.3, fluorinated SiO.sub.2 and fluorinated Celite. The fluorinated surfaces of the present invention are particularly useful in processes for purification of DNA from other cellular components. In these processes, a suspension of cellular components is placed in contact with the fluorinated surface, the fluorinated surface is washed to remove all cellular components other than DNA which are bound to the surface, and the bound DNA is eluted from the surface. Lower concentrations of chaotrope in the binding buffer are needed to bind DNA to the fluorinated surfaces.

Abstract: Bastnaesite and magnesium-containing materials can be chemically reacted by use of reactions wherein alumina is made into a sol by use of a mono-protonic acid and then reacted with a magnesium-containing ingredient (e.g., magnesium acetate) and a bastnaesite ingredient such that, upon spray drying and calcination of the resulting composition, the bastnaesite is chemically reacted with magnesia to form a bastnaesite/magnesia/alumina compound having SO.sub.x activity.

Abstract: The present invention relates to a process for making novel catalysts, catalyst supports, and adsorbers comprising synthetic hydrotalcite-like binders, having a sheet-like morphology and a sheet broadness to thickness ratio of at least 50 and a formula Mg.sub.1-x Al.sub.x (OH).sub.2.xA.sup.-. mH.sub.2 O where A.sup.- is a mono carboxylic anion of the form RCOO.sup.- where R is C.sub.n H.sub.2n+1 and n=0-5, and x and m are numbers satisfying the following conditions:0.2<=x<=0.40.0<=m<=4This hydrotalcite-like material is combined with an inorganic material to form shapes which have good mechanical strength. The process includes starting with a synthesis mixture having magnesium (divalent cation) to aluminum (trivalent cation) molar ratio between 1:1 and 10:1, mono carboxylic anion to aluminum (trivalent cation) molar ratio between 0.1:1 to 1.2:1 and optionally added other anions.

Abstract: A sorbent capable of removing trace amounts of oxygen (ppt) from a gas stream at a high temperature above 200.degree. C. comprising a porous alumina silicate support such as zeolite containing from 1 to 10 percent by weight of ion exchanged transition metal such as copper or cobalt ions and 0.05 to 1.0 percent by weight of an activator selected from a platinum group metal such as platinum. The activation temperature, oxygen sorption and reducibility are all improved by the presence of the platinum activator.

Abstract: Crystals of the Zeolite Analcime (Analcite) Na.sub.2 O.Al.sub.2 O.sub.3.4SiO.sub.2.2H.sub.2 O are provided having a largest dimension greater than 50 micron. A method for preparing such crystals by mixing aqueous solutions of aluminium sulphate and sodium metasilicate, allowing a gel to form then heating, is provided. The presence of an organic water-miscible base encourages an increased crystal size. The crystals retain water strongly and a use for them in long term immobilisation of tritiated waste water is provided.

Abstract: This invention is generally directed toward a catalyst system useful for polymerizing olefins. The method for preparing the catalyst of the invention provides for combining a bulky ligand transition metal catalyst with an activator that has been aged, optionally with a support. The catalyst system is useful in any polymerization process.

Abstract: Provided is an improved process for removing hydrogen sulfide from fluid streams by contacting a hydrogen sulfide contaminated fluid stream with a novel fluidizable sorbent composition comprising zinc oxide, alumina and silica. Further provided is a novel method for producing a fluidizable sorbent composition containing zinc oxide, alumina and silica.

Abstract: The present invention relates to fluorinated surfaces which exhibit sufficient hydrophilicity and sufficient electropositivity to bind DNA from a suspension containing DNA and permit elution of the DNA from the surface. Generally, the hydrophilic and electropositive characteristics are expressed at the fluorinated surface. Preferred fluorinated surfaces of the present invention include fluorinated Al(OH).sub.3, fluorinated SiO.sub.2 and fluorinated Celite. The fluorinated surfaces of the present invention are particularly useful in processes for purification of DNA from other cellular components. In these processes, a suspension of cellular components is placed in contact with the fluorinated surface, the fluorinated surface is washed to remove all cellular components other than DNA which are bound to the surface, and the bound DNA is eluted from the surface. Lower concentrations of chaotrope in the binding buffer are needed to bind DNA to the fluorinated surfaces.

Abstract: An alumina sorbent capable of adsorbing NOx and SOx from waste gases and being regenerated by heating above 650.degree. C. is made by incorporating an alumina stabilizing agent into the sorbent. A preferred method is to add the stabilizer when the alumina is precipitated. The precipitated powder is formed subsequently into a slurry, milled and spray dried to form the stabilized spheroidal alumina particles having a particle size of less than 500 microns. These particles are impregnated with an alkali metal or alkaline earth metal to form the stabilized sorbent. Alumina stabilizers include one or more of silica, lanthana, other rare earths, titania, zirconia and alkaline earths.

Abstract: A collapsed composition is described which is substantially composed of microcrystallites collectively of the formula:M.sub.2m.sup.2+ Al.sub.2-p M.sub.p.sup.3+ T.sub.r O.sub.7+r.swhere M.sup.2+ is a divalent metal, M.sup.3+ is a trivalent metal, and T is vanadium, tungsten, or molybdenum.The microcrystallites are so small as to be undetectable through conventional x-ray diffraction techniques, yet high resolution electron microscopy reveals that a substantial portion of the microcrystallites are composed of a solid solution having aluminum oxide molecularly dispersed in a divalent metal monoxide crystal structure. Another portion of the microcrystallites are constituted by a spinel phase. The collapsed composition is suitable as a sulfur oxide absorbent, having comparatively high capacity and comparatively fast absorption and desorption rates. The collapsed composition may be produced by heat treating a layered mixed hydroxide clay having interlayer anions in monometalate form.

Abstract: Bastnaesite materials and Mg[A] (and/or Al[B]) materials can be chemically reacted by use of reactions wherein a Al[B] ingredient such as alumina is made into a sol by use of a mono-protonic acid before Mg[A] (and/or Al[B]) materials is (are) reacted with the bastnaesite material.

Abstract: Ternary metal oxide solid solutions containing permutations of magnesium, nickel, and cobalt with trivalent metals such as aluminum, chromium, gallium, and iron show unusual resistance to rehydration. In addition, the ternary metal oxide solid solutions containing magnesium show unusual basic behavior with small incremental changes in magnesium content, especially where the magnesium represents under about 25 gram atom percent of all divalent metal cations. Such materials show promise as catalysts and adsorbents per se, and also have promise as hydrothermally stable carriers for catalytically active species.

Abstract: The treatment of cooking oil with a combination of alumina and amorphous silica is disclosed. This combination, preferably with a silica hydrogel and a hydrated alumina, reduces all contaminants known to degrade the oil without introducing metals or increasing undesirable soaps.

Abstract: A highly microporous adsorbent material is formed as a composite of a natural or synthetic clay or clay-like mineral matrix intercalated with an active carbon. The mineral is prepared and selected to have a selected interlayer spacing between microcrystalline sheets. An organic polymeric precursor is contacted therewith to fill the matrix interstices. Then the precursor is polymerized and carbonized to yield the adsorbent material in which the carbon is intercalated into the mineral matrix. The mineral can be naturally occurring smectite or synthetic hydrotalcite.

Abstract: Scavenger compositions useful for purifying process gas streams, such as process gas streams, such as hydrogen, nitrogen, noble gases, diborane, and hydride gases from Groups IVA-VIA of the Periodic Table, such as arsine, phosphine, silane, germane, hydrogen selenide, and hydrogen telluride, and mixtures thereof, to remove water, oxygen, and other oxidant and Lewis acid impurities therefrom, such scavenger comprising a porous, high surface area inert support having thereon an active scavenging species, formed by the deposition on the support of a Group IA metal and pyrolysis thereof at a selected elevated temperature on said support.

Abstract: An aggregated synthetic hydrotalcite having a substantially spheroidal shape and an average diameter of up to about 60 .mu.m is disclosed. The aggregates are composed of individual platy particles having plate diameters of from about 0.05 to about 10 .mu.m. The material has a low tapped density, a high pore volume and a high specific surface area.A process for producing the product is also disclosed. Product particle size is determined by controlling process parameters including reaction temperature and pH, stirring speed of the reaction mixture, and reactant addition rates and concentrations, including aqueous solutions of soluble magnesium and aluminum salts, which are mixed in a molar ratio of from about 2.5:1 to 4:1, and a basic solution containing excess carbonate and base to maintain the reaction mixture at a pH of from about 8.5 to about 9.5.

Abstract: A solid mass for the recovery of mercury, comprising a solid mineral support or dispersant, essentially copper and sulphur at least partly in the form of copper sulfide is produced by the following stages:a) at least one copper compound other than a sulphide is incorporated into a solid mineral dispersant or carrier,b) the product obtained in stage (a) is calcined in order at least partly to convert the copper compound or compounds which it contains into copper oxide (CuO and/or Cu.sub.2 O),c) the product obtained in stage (b) or in stage (a) if there has not been a stage (b) is brought into contact with elementary sulphur,d) the product resulting from stage (c) referred to as the precursor, is subjected to a thermal treatment in a non-oxidizing atmosphere and accompanied by gas scavenging, to a temperature and for a sufficient time to allow the formation of sulphide of the metal(s) present.

Abstract: A wastewater clarificant very excellent in the powers for removing BOD, COD and SS is provided. The clarificant comprises an aqueous solution containing a polynuclear complex salt that is obtained by subjecting to isochoric heating an aqueous solution containing a mixture of sulfates of a plurality of metals selected from the group consisting of potassium, iron, calcium, sodium, magnesium and aluminum. Preferably, the clarificant comprises an aqueous solution containing a polynuclear complex salt that is obtained by subjecting to isochoric heating an aqueous solution containing a mixture of sulfates of a plurality of metals selected from the group consisting of, in molar concentration, 0.02 to 0.08 of potassium, 0.11 to 1.31 of iron, 0.003 to 0.030 of calcium, 0.004 to 0.040 of sodium, 0.27 to 0.81 of magnesium and 0.370 to 1.300 of aluminum.

Abstract: The present invention produces very stable, covalently bonded separation substrates for separations application such as liquid and gas chromatography as well as capillary zone electrophoresis. An intermediate substrate is prepared which has hydride species on the substrate surface. These hydrides preferably are further derivatized by the catalytic addition of organic compounds bearing a terminal vinyl group. The final surface modification contains closely packed, direct carbon linkages that are stable.

Abstract: A stable, metallic hydride composition and a process for making such a composition. The composition comprises a uniformly blended mixture of a metal hydride, kieselguhr, and a ballast metal, all in the form of particles. The composition is made by subjecting a metal hydride to one or more hydrogen absorption/desorption cycles to disintegrate the hydride particles to less than approximately 100 microns in size. The particles are partly oxidized, then blended with the ballast metal and the kieselguhr to form a uniform mixture. The mixture is compressed into pellets and calcined. Preferably, the mixture includes approximately 10 vol. % or more kieselguhr and approximately 50 vol. % or more ballast. Metal hydrides that can be used in the composition include Zr, Ti, V, Nb, Pd, as well as binary, tertiary, and more complex alloys of La, Al, Cu, Ti, Co, Ni, Fe, Zr, Mg, Ca, Mn, and mixtures and other combinations thereof. Ballast metals include Al, Cu and Ni.

Abstract: A system and method are disclosed for removing hydrocarbons from a gaseous mixture, which comprises selecting a plurality of agents which are effective for adsorbing hydrocarbons at predetermined temperatures, wherein for at least two of the adsorbing agents, the temperatures at which the maximum adsorption rates for the hydrocarbons occur, are different from one another, and contacting the adsorbing agents with the gaseous mixture at the predetermined temperatures to cause adsorption of the hydrocarbons. A multistage catalyst system for converting NO.sub.x, CO, and hydrocarbons from a gaseous mixture to innocuous products is disclosed, which comprises the above described system for removing hydrocarbons as one stage, and a main body catalyst stage for converting NO.sub.x, CO, and hydrocarbons to innocuous products, wherein the gaseous mixture passes from one stage to the other.

Abstract: The present invention relates in general to highly siliceous zeolitic molecular sieve adsorbent compositions having reduced catalytic activity and to the process for preparing such compositions. The number of acid sites in the so-called silica molecular sieves is very low, but exhibit a disproportionately high acid activity. In a variety of adsorptive separation applications in which the hydrophobic character of these molecular sieves is important, undesirable catalytic conversion of one or more of the adsorbates is frequently encountered. This acid activity is effectively eliminated by incorporating a stoichiometric excess with respect to the aluminum content of the molecular sieve of an alkali metal compound into the molecular sieve followed by calcining the loaded silicalite at temperatures of at least 750.degree.C. The adsorbent is particularly useful in separations of materials which are subject to catalytically initiated reactions, e.g., olefins and alcohols.

Abstract: A composition having a strong air cleaning ability, comprising co-existent products comprised of a reaction product of at least one metal selected from Fe, Mn, Cr, Ni, Zn, Al and Cu and alloys containing these metal elements with tannic acid and/or gallic acid or a reaction product with at least one acid or ascorbic acid, citric acid, tartaric acid and gluconic acid containing tannic acid and/or gallic acid, and an unreacted metal as mentioned above co-existing with the reaction product, and in some cases, further containing a co-existent product comprising iron hydroxide and/or a sulfide, and a method of preparing same.

Abstract: A filter for removing contaminants from a gas contains a support material and, deposited on the support material, a first component which is an oxide, a hydroxide or a mixture of an oxide and hydroxide of Al, Si, Ti, Fe or Zn, containing at least about 0.5% by weight of water. The first component is deposited onto the filter preferably from a colloidal sol solution of a compound of the metal of that component. The first component acts as an adsorbent to remove contaminants from a gas, such as air. The filter may contain a second component, such as an alkali metal, alkaline earth metal, permanganate(s), or a mixture thereof. The filter may also contain a third component, such as an adsorbent, in the form of separate particles, e.g., activated charcoal, potassium permanganate, activated alumina, optionally treated with an alkali metal or alkaline earth metal compound(s), zeolites, and alumino-silicate compositions.

Abstract: A composition (being effective for removing chloride ions from liquids) comprises at least one hydrotalcite and 3-6 weight percent of at least one sodium polyphosphate. Preferably, this composition is prepared by a process comprising the step of calcining a mixture of at least one hydrotalcite and 3-6 weight percent of at least one sodium polyphosphate for about 10-20 hours at a temperature of about 370.degree.-480.degree. C.

Abstract: A zinc oxide-hydroxide complex produced by heating freshly prepared zinc hydroxide at a temperature from about 150.degree. C. to about 450.degree. C. is useful as an adsorbent for malodorous gases such as hydrogen sulfide, mercaptans and the like. The complex alone or its combination with aluminum dihydrogen tripolyphosphate may be incorporated into a synthetic thermoplastic resin for fabricating shaped plastic articles for deodorant uses.

Abstract: Disclosed is a method of producing a functionalized layer and an aluminum hydroxide layer on an aluminum substrate, the aluminum hydroxide layer located between the substrate and the functionalized layer. The method comprises the steps of subjecting an aluminum substrate to a hydrothermal treatment in an aqueous solution having a pH in the range of 2 to 14 to form a layer of aluminum hydroxide on said substrate and thereafter treating said aluminum substrate with a phosphorus-containing acid selected from phosphinic and phosphonic acid to form a functionalized layer on said aluminum hydroxide layer, the functionalized layer comprised of the reaction product of said acid and the layer of aluminum hydroxide.

Abstract: Processes for removing noxious sulfur oxides from gas streams, particularly from flue gases of coal-burning power plants, using heated layered double hydroxide (LDH) sorbents are described. The sorbent compositions contain metal components, incorporated into the sorbents either by isomorphous replacement of all or part of M.sup.II and/or M.sup.III ions in layers of LDH structures or by impregnation as a metal salt, to promote the oxidation of sulfur dioxide.

Abstract: A composition for use as a road base or levee fill. The composition comprises catalytic cracking catalyst particles in the size range of 1 to 200 microns and a binder the type and amount of which depend on the end use. Hydrated lime is employed as the binder in road base construction while hydrated lime, portland cement, fly ash or mixtures of fly ash and portland cement can be used in levee construction. The spent catalyst particles are present in amounts of 80% to 96% and the binder is present in amounts of 4% to 20%, both percentage ranges being determined according to the dry weight of the composition.

Abstract: A process for producing a hydrated and cured product of a lime-gypsum-coal ash mixture capable of constituting a high-performance desulfurizing agent, with a high yield and in a simplified manner is provided, which process comprises adding water to a mixture of lime, used desulfurizing agent and coal ash, followed by kneading the resulting mixture, then extruding the resulting kneaded material through a hole of 2 to 10 mm in diameter to obtain bullet-like materials, hydrating and curing said bullet-like materials, followed by drying.

Abstract: A scavenger for purifying inert gas mixtures to remove Lewis acid and oxidant impurities therefrom, comprising (i) an inert inorganic support, and (ii) an active scavenging species on the support, formed by deposition thereon of an organometallic precursor and pyrolysis thereof at a selected elevated temperature. The organometallic precursor is an alkyl metal compound comprising a metal of Group IA, IIA, and/or IIIA, wherein the pyrolysis temperature may range from about 150.degree. C. to about 250.degree. C., depending on the specific alkyl metal compound employed as the precursor. Also disclosed are: a corresponding method of making the scavenger; a process for purifying inert gases by contacting same with the scavenger; and a vessel containing a bed of the scavenger, useful as an apparatus for purifying inert gases.

Abstract: Agglomerates containing oxide, hydroxides, carbonates and/or basic carbonates of copper, and zinc and/or another element such as aluminium or silicon, are useful for removal of sulphur compounds from fluids, especially under non-reducing conditions. The agglomerates have surface area above 80 m.sup.2.g.sup.-1 and a calcined density below 1.5 g.cm.sup.-3. After ignition, the cupric oxide plus zinc oxide (if any) content of the agglomerates is at least 70% w/w. The proportion of the copper compound is such that the copper atoms constitute 30-97% of the total of the copper, zinc, and said other element atoms in the agglomerates.

Abstract: Disclosed is a composite adsorbent consisting of a molded body of homogeneous mixture comprising powdery active carbon and hydrous alumina of the pseudoboehmite type. This composite adsorbent has high mechanical strength and abrasion resistance. This composite adsorbent is excellent in the capacity of adsorbing organic components such as gasoline, and the desorption of the adsorbed components can be easily accomplished at a high desorption ratio. These excellent capacities are retained even if the adsorption-desorption cycle is repeated. Accordingly, this composite adsorbent is especially valuable as the adsorbent for an automobile canister.

Abstract: There is provided layered oxides of aluminum and phosphorus or arsenic having pendant organic groups which protrude into the inner layer region of these layered materials. These materials may be prepared by reacting a suitable organoarsenic or organophosphorus compound, such as phenylphosphonic acid, with a suitable aluminum compound, such as alumina, in the presence of a suitable solvent, such as a mixture of ethanol and water, under conditions of elevated temperature.

Abstract: A SiO.sub.2 -bound, substantially carbonate-free, calcium-containing zeolite A granulate in which the calcium content is 0.4 to 1 mole CaO/mole Al.sub.2 O.sub.3 and a process for the production such SiO.sub.2 -bound calcium exchanged zeolite A granulate in a CO.sub.2 -free atmosphere at temperatures of 350.degree. C. to 700.degree. C. The SiO.sub.2 -bound zeolite granulate A being useful as an adsorbent in the recovery of oxygen by the pressure change adsorption process.

Abstract: Agglomerates containing oxides, hydroxides, carbonates and/or basic carbonates of copper, and zinc and/or another element such as aluminum or silicon, are useful for removal of sulphur compounds from fluids, especially under non-reducing conditions. The agglomerates have surface area above 80 m.sup.2.g.sup.-1 and a calcined density below 1.5 g.cm.sup.-3. After ignition, the cupric oxide plus zinc oxide (if any) content of the agglomerates is at least 70% w/w. The proportion of the copper compound is such that the copper atoms constitute 30-97% of the total of the copper, zinc, and said other element atoms in the agglomerates.

Abstract: N-methyl pyrrolidone solvent (hereinafter NMP) used to extract aromatic components from lubricating oil distillates is purified by contacting the solvent with activated alumina.

Abstract: A scavenger, having utility for purifying a mixture comprising:(i) a primary component selected from one or more members of the group consisting of hydrogen selenide and hydrogen telluride, and(ii) impurities selected from one or more members of the group consisting of moisture and oxidants, comprising:(a) a support; and(b) associated with said support, one or more members of the group consisting of:(I) precursor compounds of the formula R.sub.3-x AlH.sub.x, wherein x is 0 or 1, and R is a hydrocarbon radical containing from 1 to 12 carbon atoms; and(II) aluminum chalconides of the formula Al.sub.2 M.sub.3, wherein M is selenium or tellurium.Illustrative supports useful in such scavenger include aluminosilicates, alumina, silica, carbon, and macroreticulate polymers. A process and apparatus are disclosed for purifying hydrogen selenide and/or hydrogen telluride, to remove moisture and/or oxidant impurities therefrom, in which a bed of the scavenger is employed.

Abstract: A process for purifying a gaseous mixture comprising arsine, phosphine, ammonia, and/or inert gases, to remove Lewis acid and/or oxidant impurities therefrom, comprising contacting the mixture with a scavenger including a support having associated therewith an anion which is effective to remove such impurities, such anion being selected from one or more members of the group consisting of: (i) carbanions whose corresponding protonated compounds have a pK.sub.a value of from about 22 to about 36; and (ii) anions formed by reaction of such carbanions with the primary component of the mixture.

Abstract: Disclosed is a method of making an ion exchange material. A ceramic material is ion implanted with sulfur, carbon, phosphorus, or nitrogen, which is oxidized to sulfate, carboxylate or carbonate, phosphate, or nitrate, respectively, or the nitrogen is reduced to amine amide. Alternatively, a mixture of ceramic powder and a binder containing sulfur, carbon, phosphorus, or nitrogen is heated in a nonoxidizing atmosphere to a temperature up to 1000.degree. C. The sulfur is then oxidized to sulfate, the carbon to carboxylate or carbonate, phosphorus to phosphate, and nitrogen to nitrate, or the nitrogen is reduced to amine or amide. Also disclosed is an ion exchange material made by these methods and a method of treating acidic aqueous solutions containing dissolved radioactive materials by passing them through an ion exchange column containing the ion exchange material.

Abstract: Hydrocarbon gases containing trace quantities of mercury are treated to remove the mercury by contacting the gases with a porous bed of aluminum which has been activated by contacting it with an aqueous solution of a soluble mercuric salt and subsequent drying of the activated bed in a non-oxidizing atmosphere.

Abstract: Novel sorbents comprising (a) an alumina substrate having a pore volume between 0.4 and 0.8 cc/g, and (b) an alkali or alkaline earth component, for example, sodium carbonate, wherein the amount of the alkali or alkaline earth component is between 50 and 400 .mu.g per m.sup.2 of the substrate. The sorbents of the present invention are outstandingly effective for the removal of nitrogen oxides, sulfur oxides and hydrogen sulfide from waste gas streams.

Abstract: Durable, porous sulfur sorbents useful in removing hydrogen sulfide from hot coal gas are prepared by water pelletizing a mixture of fine zinc oxide and fine iron oxide with inorganic and organic binders and small amounts of activators such as sodium carbonate and molybdenite; the pellets are dried and then indurated at a high temperature, e.g., 1800.degree. C., for a time sufficient to produce crush-resistant pellets.

Abstract: Novel adsorbent and substrate compositions are formed by mixing activated aluminas and synthetic hydrotalcite produced by reacting activated magnesia with an aqueous solution containing aluminate, carbonate, and hydroxyl ions. Activated magnesia used in this method is formed by heating a magnesium compound such as magnesium carbonate or magnesium hydroxide to a temperature between about 500.degree.-900.degree. C. The method is suited to producing synthetic hydrotalcite from industrial Bayer liquor. The synthetic hydrotalcite so formed can be heated to a temperature of about 500.degree.-600.degree. C. to form a highly porous and adsorbent product either before or after mixing with activated aluminas to form the composite of the present invention.

Abstract: Ion exchange resins in the base form, e.g., DOWEX MWA--1--OH ion exchange resin, which contain crystalline Al(OH).sub.3, e.g., gibbsite, and/or bayerite, and/or norstrandite, are treated with hot, concentrated LiX solutions (where X is anion) to prepare 3-layer crystalline LiX.2Al(OH).sub.3.nH.sub.2 O in the resin.

Abstract: Provided is a method for the preparation of alumina or silica-alumina catalyst carriers which comprises blending a precursor of alumina or silica-alumina carriers with polytetrafluoroethylene resin particles, warming the blend and subjecting the same to a compression and shearing operation in a blender, followed by drying and baking.

Abstract: Crystalline 2-layer LiOH.2Al(OH).sub.3.nH.sub.2 O, preferably supported by a porous substrate, is prepared by treating crystalline 2-layer LiX.2Al(OH).sub.3.nH.sub.2 O, where X is anion, with a LiOH solution or other hydroxide ion source. The so-formed crystalline 2-layer LiOH.2Al(OH).sub.3.nH.sub.2 O is particularly suitable for exchange of the OH ion with larger X' ions to produce other crystalline 2-layer LiX'.2Al(OH).sub.3.nH.sub.2 O.

Abstract: The bayerite form of crystalline alumina, Al(OH).sub.3, contained within a macroporous ion exchange resin is converted to the gibbsite form of Al(OH).sub.3 by reaction with hot MgX.sub.2, where X is halide, followed by water-washing the MgX.sub.2 portion from the product, thereby causing the conversion of bayerite to the gibbsite form of crystalline Al(OH).sub.3. The gibbsite form may then be reacted with hot LiX solution, where X is anion, to form crystalline 2-layer LiX.2Al(OH).sub.3.nH.sub.2 O.

Abstract: An adsorbent composition consisting essentially of(i) about 5 to about 95% by weight of a hydrotalcite compound represented by the following formula (1)(M.sup.2+).sub.x Al.sub.2 (OH).sub.2x+6-ny (A.sup.n-).sub.y.mH.sub.2 O (1)whereinM.sup.2+ represents Mg.sup.2+ and/or Zn.sup.2+,A.sup.n- represents an anion having a valence of n, andx, y and m are numbers which satisfy the following conditionsx.gtoreq.1, 0<y<2, m>0,or a product of calcination at a temperature of up to about 800.degree. C. of said hydrotalcite compound, and(ii) about 95 to about 5% by weight of activated carbon.