Abstract: Fine particulate silica gel having the following characteristics (1) to (3): (1) average particle size: from 1 to 200 &mgr;m; (2) oil absorption in accordance with JIS K5101: from 100 to 300 ml/100 g; and (3) hygroscopicity represented by moisture adsorption under a relative humidity of 90% at 25° C. in accordance with JIS Z0701: not more than 20 wt %.

Abstract: A solid combination of elemental sulfur and an inorganic support material prepared in an inert atmosphere to provide a composition for absorbing trialkyl arsines. The composition prepared thereby and the method for absorbing trialkyl arsines using the composition.

Abstract: This invention relates to metallocene catalyst compositions which are highly active for the polymerization of olefins, particularly prochiral &agr;-olefins. The catalyst compositions contain at least one metallocene, and least one activator and a support that has been fluorided using a fluoride containing compound.

Abstract: Methods, compositions and devices for purifying polypeptides and/or proteins using metal loaded ligand bound membranes by metal ion affinity chromatography are described.

Abstract: An adsorbent and a process are disclosed for drying gases in a pressure swing dryer. The adsorbent comprises a pre-formed alumina particle with a thin layer of colloidal silica disbursed on the surface of the preformed alumina particle.

Abstract: This invention relates to metallocene catalyst compositions which are highly active for the polymerization of olefins, particularly prochiral &agr;-olefins. The catalyst compositions contain at least one metallocene, and least one activator and a support that has been fluorided using a fluoride containing compound.

Abstract: A method for the production of silicon oxide particles includes the pyrolysis of a molecular stream with a silicon compound precursor, an oxygen source and a radiation absorbing gas. The pyrolysis is driven by a light beam such as an infrared laser beam. The method can be used in the production of nanoscale particles including highly uniform nanoscale particles.

Abstract: A method for preparing synthetic, semi-crystalline, porous inorganic oxide composition containing a reactive organic silane moiety which is on the surface of pore walls. The composition is prepared from a poly(oxyalkylene) based surfactant and a hydrolyzable organic silane. The surfactant is preferably a poly(ethylene) oxide, a poly(propylene) oxide polymer or mixtures thereof. The organic silane is preferably mercaptopropylsilane. The compositions are particularly useful as adsorbents, and catalysts.

Abstract: Attrition resistant, sorbent compositions for the removal of elemental sulfur and sulfur compounds, such as hydrogen sulfide and organic sulfides, from cracked-gasoline and diesel fuels are prepared by the impregnation of a sorbent support comprising zinc oxide, expanded perlite, and alumina with a promoter such as nickel, nickel oxide or a precursor of nickel oxide followed by reduction of the valence of the promoter metal in the resulting promoter metal sorbent support composition.

Abstract: A silica-polyamine based extraction material removes selected transition metal ions from solution in the presence of iron ions. The silica-polyamine base is a reaction product of a polyamine and a covalently anchored trifunctional hydrocarbylsilyl that yields non-crosslinked amino groups to which pyridine function group is attached. The extraction material is particularly useful in selectively removing copper from low concentration, low pH leach solutions separating copper from ferric iron or chloride ions. The product is a durable, high capacity extraction material that selectively captures copper at high flow rates and releases that copper into highly concentrated solutions.

Abstract: A gas adsorbent is made by dissolving a polymer in one or more first solvents to form a polymer solution; mixing an inorganic adsorbent with the polymer solution to form a precursor; molding the precursor; and leaching the first solvents from the precursor with a second solvent.

Abstract: An AgX-type zeolite having a silver exchange level of 20-70% and a Ar/O2 Henry's law selectivity ratio at 23° C. of 1.05 or greater has an optimum combination of selectivity for argon over oxygen at lower cost than higher silver exchange levels. This material can be used in oxygen VSA/PSA processes to produce oxygen at purities above 97%.

Abstract: An object of the present invention is to provide a composition for use in adsorption treatment which is easy to handle; a method for easily preparing the composition in the form of grains without inhibiting its adsorption ability; products such as an adsorption treatment device and a filter for air-cleaning formed with the composition; and a method of adsorption treatment. The composition for use in adsorption treatment of the present invention includes an adsorbing substance which is reactive with components to be adsorbed in the presence of moisture, a water-absorbing substance, and a binder, wherein the binder is 1.3 to 8 weight percent with respect to the water-absorbing substance.

Abstract: A composition and method of making a strength enhanced composition are described. The composition comprises zinc oxide, silica and colloidal oxide solution. The colloidal oxide solution is utilized as a binding agent to provide a strength enhanced absorbent composition that can be utilized in an absorption process for the purpose of removing sulfur contaminants from fluid streams.

Abstract: In a process for reacting an organic compound in the presence of a catalyst comprising, as active metal, at least one metal of transition group VIII of the Periodic Table, either alone or together with at least one metal of transition group I or VII of the Periodic Table, in an amount of from 0.01 to 30% by weight, based on the total weight of the catalyst, applied to a support containing macropores, the support comprises, as a support component, boron(III) oxide in an amount of from 10 to 100% by weight, based on the total weight of the support.

Abstract: Attrition resistant, sorbent compositions for the removal of elemental sulfur and sulfur compounds, such as hydrogen sulfide and organic sulfides, from cracked-gasoline and diesel fuels are prepared by the impregnation of a sorbent support comprising zinc oxide, expanded perlite, and alumina with a promoter such as nickel, nickel oxide or a precursor of nickel oxide followed by reduction of the valence of the promoter metal in the resulting promoter metal sorbent support composition.

Abstract: A macroporous adsorbent comprising pores having a pore volume (Vm) and a mean pore diameter (dm) such that: Vm≧1 cc.g−1 and dm≧1 &mgr;m, Vm and dm being determined by mercury porosimetry; their manufacturing process using a spheronization and freeze-drying technique; and their use for separating or purifying gases, such as air, synthesis gases or hydrocarbons, especially olefins.

Abstract: Disclosed is a carbon dioxide gas absorbent containing lithium silicate reacting with a carbon dioxide gas to form lithium carbonate and represented by the general formula, LixSiyOz, where x, y, z are integers meeting the requirement of x+4y−2z=0. The lithium content x in the general formula should desirably be at least 4.

Abstract: A sorbent material is provided comprising a material reactive with sulfur, a binder unreactive with sulfur and an inert material, wherein the sorbent absorbs the sulfur at temperatures between 30 and 200° C. Sulfur absorption capacity as high as 22 weight percent has been observed with these materials.

Abstract: An enhanced material formed from a carrier material having a high porosity. The carrier material is treated with a mixture of hydrocarbons to increase the adherence of the carrier material particles to one another to minimize atmospheric contamination of the carrier materials in use. The material has particular applicable to environments where such contamination would create problems, such as food processing and preparation environments, computer operations, electronic component manufacturing and other environments. The material meets the requirements of FDA regulations for Indirect Food Contact.

Abstract: Disclosed are amorphous precipitated silicas, silica gels, and amorphous carbons derived from biomass and methods of producing them with and without adhered or deposited amorphous carbons produced by acidifying a caustic silicate solution produced by caustic digestion of biomass ash containing silica with and without activated carbon, the ash being obtained from thermal pyrolysis of the biomass, the acidifying effective to produce a slurry of the precipitated silica and silica gels with and without adhered or deposited amorphous carbon, and separated from the slurry the precipitated silicas and silica gels with and without the adhered or deposited amorphous carbons. The properties of the precipitated silica with adhered or deposited carbon being within the range as utilized in rubber compositions thereby avoiding the blending of silica and carbon components for such use.

Abstract: This invention relates to metallocene catalyst compositions which are highly active for the polymerization of olefins, particularly prochiral &agr;-olefins. The catalyst compositions contain at least one metallocene, and least one activator and a support that has been fluorided using a fluoride containing compound.

Abstract: The present invention relates to a novel family of inorganic solids with a narrow and calibrated mesopore distribution which are agglomerated with a binder; these solids can advantageously be used as adsorbents for the industrial separation of gas-phase compounds having different boiling points.

Abstract: Disclosed is a carbon dioxide gas absorbent containing lithium silicate reacting with a carbon dioxide gas to form lithium carbonate and represented by the general formula, LixSiyOz, where x, y, z are integers meeting the requirement of x+4y−2z=0. The lithium content x in the general formula should desirably be at least 4.

Abstract: A process for removing hydrogen sulfide from a fluid stream by contacting a hydrogen sulfide-containing stream with a sorbent composition wherein said sorbent composition is produced by mixing at least one zinc component which is zinc oxide or a compound convertible to zinc oxide, at least one silica component where the silica component comprises silica or a compound convertible to silica, at least one colloidal metal oxide, and optionally at least one pore generator component so as to form a mixture, extruding the mixture, sphering the resulting extrudate to form spherical particles having a size of form about 0.5 to about 15 millimeters drying the resulting spherical particles, calcining the dried particles, steaming the resulting calcined particles, sulfiding the steamed particles by contacting them with sulfides or sulfur at a temperature of about 200° C. to 1400° C.

Abstract: The present invention relates to the use of absorbent materials for separating water from an emulsion comprising water and lipophilic fluid. The methods, systems, and compositions of the present invention expose the emulsion to absorbent materials such that water is absorbed out of the emulsion in order to facilitate the recovery of the lipophilic fluid.

Abstract: A method for the manufacture of a sorbent composition having an attrition-resistant coating suitable for use in the removal of hydrogen sulfide from sulfur-containing fluid streams. Also disclosed is a process for removing hydrogen sulfide from sulfur-containing fluid streams and a sorbent composition suitable for use in such process.

Abstract: An absorbing composition containing alumino silicate containing schistose particles having at least partially a layered structure with substantially parallel layers, whereby at least for 30 percent by weight of the alumino silicate containing schistose particles the distance between two structurally adjacent layers is greater than 5 &mgr;m, but less than 100 &mgr;m, wherein at least 25 percent by weight of the alumino silicate containing schistose particles consist of aluminum containing di-octahedric layers, wherein the particles are provided with metallic flakes, whereby these metallic flakes are at least partially bound onto and between two structurally adjacent layers of the alumino silicate containing schistose particles, and in which at least 50 percent by weight of these metallic flakes have a thickness of 2 to 5 &mgr;m, a maximum length or diameter between 6 and 60 &mgr;m, and a specific surface area greater than 100 m2/g.

Abstract: This invention relates to metallocene catalyst compositions which are highly active for the polymerization of olefins, particularly prochiral &agr;-olefins. The catalyst compositions contain at least one metallocene, and least one activator and a support that has been fluorided using a fluoride containing compound.

Abstract: Frangible, spray dried agglomerate catalyst supports are provided, e.g. of silica gel, which possess a controlled morphology of microspheroidal shape, rough, scabrous appearance, and interstitial void spaces which penetrate the agglomerate surface and are of substantially uniform size and distribution. The agglomerates also possess a 1-250 micron particle size, 1-1000 m2/gm. surface area, and an Attrition Quality Index (AQI) of at least 10. The agglomerates are derived from a mixture of dry milled inorganic oxide particles, e.g. silica gel, and optionally but preferably wet milled inorganic oxide particles, e.g. silica gel particles, (which preferably contain a colloidal segment of <1 micron particles) slurried in water for spray drying. The high AQI assures that the agglomerates are frangible and that polymerization performance is improved.

Abstract: A superabsorbent formulation is described for absorbing liquids (for example in an ostomy, incontinence or woundcare application), the formulation comprising superabsorbent (100 pbw), silica (3-20 pbw), water (0.5-8 pbw) and glycerol (5-40 pbw). The superabsorbent and silica are mixed together in a first production stage (10), to coat the superabsorbent particles with silica. The glycerol and water are added during a second production stage (12). The effect of the silica is to increase the amount of glycerol and water which can be taken up in the formulation, thereby producing a product with greater structural stability when consolidated (compressed).

Abstract: A composition for abatement of airborne pollution by volatile organic compounds (“VOCs”) has an upstream composition which contains a protective adsorbent, e.g., Y zeolite, which is effective for adsorbing large VOC molecules, e.g., toluene, and a protective oxidation catalyst intimately intermingled therewith. The downstream composition contains a second adsorbent, e.g., a silver-containing ZSM-5, which is effective for adsorbing relatively smaller VOC molecules, e.g., propylene, and a second oxidation catalyst intimately intermingled therewith. Oxidation of VOCs while they are still retained on the adsorbents is promoted at temperatures lower than would be required if the VOCs were desorbed into the gaseous phase. Apparatus is provided including a first contact member (24) coated with the upstream composition and positioned upstream of a second contact member (32) coated with the downstream composition.

Abstract: A method and apparatus for reducing the amount of unused ammonia (“ammonia slip”) in instances where ammonia is provided to SNCR and/or SCR processes for reducing NOx pollution in flue gas produced by a fossil fuel burning facility. Such a facility incorporates a rotary regenerative heat exchanger (i.e. an air preheater and/or a gas to gas preheater) for absorbing heat from the gas flow on one side of the heat exchanger, and releasing such absorbed heat to heat the gas flow on the other side of the heat exchanger. The invention herein includes absorbent/desorbent media carried by at least some of the elements of the heat exchanger. The media is active to adsorb at least a portion of the ammonia slip before the gas flow is exhausted to the environment, and to desorb essentially an equilibrium portion of such adsorbed ammonia into gas flow.

Abstract: A method of making frangible, spray dried agglomerate catalyst supports is provided, e.g. of silica gel, which possess a controlled morphology of microspheroidal shape, preferably a rough, scabrous appearance, and interstitial void spaces which penetrate the agglomerate. The agglomerates also possess a 4-250 micron particle size, 1-1000 m2/gm. surface area, and an Attrition Quality Index (AQI) of at least 10. The method comprises dry milling inorganic oxide particles, e.g. silica gel, wet milling the dry milled inorganic oxide particles (to preferably impart a colloidal segment of <1 micron particles), and spray drying the particles. The high AQI assures that the agglomerates are frangible and that polymerization performance is improved. The controlled morphology is believed to permit the constituent particles of the agglomerates to be more uniformly impregnated or coated with conventional olefin polymerization catalysts.

Abstract: The present invention provides a method of making a catalyst for improving the performance of liquid hydrocarbon fuel. The treating agent for improving the performance of liquid hydrocarbon fuel is made by preparing a resin or a rubber composition having 100 parts by weight of a resin or a rubber component, 15 to 60 parts by weight of a carbon source having a particle size of not more than 0.5 mm and containing anthracite in amount not less than 62.5%, to 85 parts by weight of a silicon dioxide source having a particle size of not more 0,5 mm and containing quartz sand in an amount not less than 8-% and 5 to 15 parts by weight of glass fiber having an average fiber length of 6 to 12 &mgr;m, press molding the composition to obtain a molded article, and aging the molded article.

Abstract: The present invention relates to methods of derivatizing semiconductor surfaces, particularly porous silicon surfaces with silicon-carbon units. The derivatization occurs through the direct addition of an organometallic reagent in the absence of an external energy source such as heat and photo- or electrochemical energies. The method of the invention allows the formation of unique intermediates including silicon hydride units bonded to metal ions. Because of these unique intermediates, it is possible to form previously inaccessible silicon-carbon units, for example where the carbon atom is an unsaturated carbon atom. Such inaccessible silicon-carbon units also include silicon-polymer covalent bond formation, in particular where the polymer is a conducting polymer. Thus, the present invention also provides a novel semiconductor surface/polymer junction having improved interfacial interactions.

Abstract: Optically active adsorbents based on network polymerized derivatives of dicarboxylic acids, diamines or diols which are chemically bonded to a carrier. The derivatives can be polymerized by radical polymerization or through hydrosilylation in the presence of a solid carrier. The optically active adsorbents are usable for chromatographic separation of racemic mixtures of enantiomers.

Abstract: Methods of improving the flow properties of one or more dry particulate cementitious materials are provided. The methods are basically comprised of dry-blending a particulate flow enhancing additive comprised of a particulate solid adsorbent material having a flow inducing polar molecule producing chemical adsorbed thereon with said cementitious materials.

Abstract: pH dependent ion exchange matrices are provided, with methods for making such matrices, and methods for using such matrices to isolate a target nucleic acid, such as plasmid DNA, chromosomal DNA, or RNA from contaminants, including proteins, lipids, cellular debris, or other nucleic acids. Each pH dependent ion exchange matrix of this invention comprises at least two different ion exchange functional groups, one of which is capable of acting as an anion exchanger at a first pH, and the other of which is capable of acting as a cation exchanger at a second, higher pH. The matrix has an overall neutral charge in a pH range between the first and second pH. The pH dependent ion exchange matrices of the present invention are designed to bind to the target nucleic acid at a pH wherein the overall charge of the matrix is positive, and to release the target nucleic acid as the pH of the surrounding solution is increased.

Abstract: Novel sorbent systems for the desulfurization of cracked-gasoline are provided which are comprised of a bimetallic promotor on a particulate support such as that formed of zinc oxide and an inorganic or organic carrier. Such bimetallic promoters are formed of at least two metals of the group consisting of nickel, cobalt, iron, manganese, copper, zinc, molybdenum, tungsten, silver, tin, antimony and vanadium with the valence of same being reduced, preferably to zero. Processes for the production of such sorbents are provided wherein the sorbent is prepared from impregnated particulate supports or admixed to the support composite prior to particulation, drying, and calcination. Further disclosed is the use of such novel sorbents in the desulfurization of cracked-gasoline whereby there is achieved not only removal of sulfur but also an increase in the olefin retention in the desulfurized product. Such sorbents can also be utilized for the treatment of other sulfur-containing streams such as diesel fuels.

Abstract: Particulate sorbent compositions which are suitable for the removal of sulfur from streams of cracked-gasoline or diesel fuel are provided which have increased porosity, improved resistance to deactivation through the addition of a calcium compound selected from the group consisting of calcium sulfate, calcium silicate, calcium phosphate or calcium aluminate to the support system comprised of zinc oxide, silica and alumina having thereon a promotor wherein the promotor is metal, metal oxide or metal oxide precursor with the metal being selected from the group consisting of cobalt, nickel, iron, manganese, copper, molybdenum, tungsten, silver, tin and vanadium or mixtures thereof and wherein the valence of such promotor has been substantially reduced to 2 or less. Process for the preparation such sorbent systems as well as the use of same for the desulfurization of cracked-gasolines and diesel fuels are also provided.

Abstract: Particulate sorbent compositions comprising a mixture of zinc oxide, silica, alumina and a substantially reduced valence nickel are provided for the desulfurization of a feedstream of cracked-gasoline or diesel fuels in a desulfurization zone by a process which comprises the contacting of such feedstreams in a desulfurization zone followed by separation of the resulting low sulfur-containing stream and sulfurized-sorbent and thereafter regenerating and activating the separated sorbent before recycle of same to the desulfurization zone.

Abstract: The present invention relates generally to mesoporous sorbent materials having high capacity, high selectivity, fast kinetics, and molecular recognition capability. The invention also relates to a process for preparing these mesoporous substrates through molecular imprinting techniques which differ from convention techniques in that a template molecule is bound to one end of bifunctional ligands to form a complex prior to binding of the bifunctional ligands to the substrate. The present invention also relates to methods of using the mesoporous sorbent materials, for example, in the separation of toxic metals from process effluents, paints, and other samples; detection of target molecules, such as amino acids, drugs, herbicides, fertilizers, and TNT, in samples; separation and/or detection of substances using chromatography; imaging agents; sensors; coatings; and composites.

Abstract: Organic/inorganic complex porous materials are disclosed having a main skeletal chain containing metal atoms, oxygen atoms, and organic groups. Preferably, the metal atoms, oxygen atoms and organic groups are bound by ionic bonds and/or covalent bonds, and the organic group is bound to at least two metal atoms in the main chain of the skeleton of the porous material. More preferably, 60% or more of the total pore volume in the porous material has a pore diameter in a range of ±40% of the pore diameter, as determined from the maximum peak in a pore size distribution curve. Alternatively, at least one peak is present at a diffraction angle that preferably corresponds to a d value of at least 1 nm in an x-ray diffraction pattern. Method of making such organic/inorganic complex materials are also disclosed.

Abstract: A pre-glass agglomeration fragrance delivery system comprising fused microspheres and a fragrance incorporated therein. The pre-glass agglomeration has an extended fragrance release time exceeding a year and a half, and uses microcapillary action to quickly uptake oils and alcohols. The pre-glass agglomeration provides a slow release of fragrance without the escape of any residual liquid. The pre-glass agglomeration may be replenished, an unlimited number of times, with fragrance containing oils and alcohols after the odor fades. The pre-glass agglomerations can be molded and may be colored or dyed.

Abstract: Nickel-copper catalysts supported on an amorphous silica-alumina acidic carrier, preferably containing a binder, and having an iso-electric point of ≧6.5 are used to hydroisomerize paraffins, particularly Fischer-Tropsch paraffins, boiling at 350° F.+ into lighter, more valuable products.

Abstract: A non-crystalline silica solid is obtainable by a process comprising the step of contacting in a liquid medium at least one silica precursor with at least one template comprising a polyethyleneimine or a mixture of two or more thereof.

Abstract: Compositions and methods for selectively binding metal ions from a source solution comprise using a polyhydroxypyridinone-containing ligand covalently bonded to a particulate solid support through a hydrophilic spacer of the formula SS-A-X-L(HOPO)n, where SS is a particulate solid support such as silica or a polymeric bead, A is a covalent linkage mechanism, X is a hydrophilic spacer grouping, L is a ligand carrier, HOPO is a hydroxypyridinone appropriately spaced on the ligand carrier to provide a minimum of six functional coordination metal binding sites, and n is an integer of 3 to 6 with the proviso that when SS is a particulate organic polymer, A-X may be combined as a single covalent linkage.

Abstract: A process for hydrotreating a hydrocarbon feedstock (1) involving the use of at least one hydrotreatment, particularly hydrodesulfurization, reactor (2) and a fractionation unit (3), which latter contains two distinct injection zones (4, 5) for the hydrocarbon feedstocks, a common zone (8) of vaporization of the light fractions and two distinct draw-off lines (6, 7) for the liquid bottoms; the hydrocarbon feedstock (1) being subjected to a preliminary treatment either in a first hydrodesulfurization reactor (20) the operating conditions of which (P, T, LHSV) may be different from those of the hydrotreatment reactor (2), or in a sweetening apparatus or else in a sulfur trap, the hydrocarbon feedstock being then injected into the first injection zone (4) of the fractionation unit (3), the liquid bottoms being removed through the draw-off line (6) of the injection zone (4) and passed into a hydrotreatment reactor (2), the effluents from said reactor (2) being injected into a second injection zone (5) of the

Abstract: The composition of the subject invention comprises a mixture of calcium silicate and citric acid and is utilized in a method for extending the useful life of the cooking oil by blending the calcium silicate with the citric acid, introducing the mixture to the cooking oil and allowing the mixture to mix in the oil through convection currents in the oil. The oil is filtered and the composition of the subject invention is added on a daily or other basis, dependent on use.