Abstract: A fluorinated cation exchange resin catalyst is prepared by contacting a polymer containing pendant acid groups, particularly the radical --SO.sub.3 X with elemental fluorine in the presence of a water-free halogenated hydrocarbon liquid and thereafter converting the resulting pendant --SO.sub.3 X radical to a free acid.

Abstract: An enhancement of the bulk and hand of carpeting and carpet fiber is made by treating with a terpolymer, particularly the terpolymer of (a) phenyl vinyl ether, (b) 2-(4-hydroxymethyl-phenoxy)ethyl vinyl ether, and (c) maleic anhydride.

Abstract: This invention concerns novel o,o'-bismaleimide resins which have good processibility, novel o,o'-diamines used to prepare the resins, and the novel o,o'-bismaleimide polymers prepared by curing these resins. The polymers have thermo-oxidative and tensile properties which rival conventional p,p'- and m,m'-bismaleimide resin systems.The o,o'-bismaleimide resins of this invention have the following structure: ##STR1## wherein Y--G--Y is a bridging group with Y selected from the group consisting of oxygen, sulfur, and selenium, and G selected from a number of structures having aromatic and/or siloxane character. R.sub.a and R.sub.b are independently selected from the group consisting of hydrogen, an alkyl containing up to 4 carbon atoms, the corresponding alkoxy groups, chlorine, and bromine, or R.sub.a and R.sub.b together form a fused 6-membered aromatic ring.

Abstract: Silica microspheres formed by hydrolysis of a silica precursor having a mean diameter in the range of about 0.1 to 10 .mu.m are provided with a thin surface layer, often a monolayer, of a metal to provide the appearance of a solid particle of the metal as its oxide. The microspheres are contacted with an aqueous or alcoholic solution of a metal compound to deposit the surface layer.

Abstract: Vinylidene chloride is removed from 1,1-dichloro-1-fluoroethane (HCFC-141b) by contacting the HCFC-141b in the vapor phase with chlorine in the presence of ultraviolet light providing an exposure up to about 50 watts-hour/kg.

Abstract: Mixed-metal oxide absorbents having superior CO.sub.2 and water removal capacity and superior regenerability are prepared from novel mixed-metal carbonate precursors or from mixed-metal oxides derived from those precursors. The precursors are prepared from a salt of silver and the salt of a second metal. The second metal may be selected from the group consisting of magnesium, iron, cobalt, nickel, zinc, and other metals for which the metal carbonate to metal oxide reaction occurs at a temperature of not greater than about 400.degree. C. The precursors have an unique x-ray diffraction pattern characteristic of the silver carbonate pattern rather than of the physical mixture of the silver carbonate and the carbonate of the second metal.

Abstract: A predetermined pattern of a dielectric polymer is formed on a substrate from a mixture of prepolymers which are the ethers of the oligomeric condensation product of (a) dihydric phenol and formaldehyde and (b) a dialdehyde and 3 to 4 moles of a phenol.

Abstract: A predetermined pattern of a dielectric polymer is formed on a substrate from a prepolymer which is an ether of the oligomeric condensation product of a dihydric phenol and formaldehyde having the formula ##STR1##

Abstract: The instant invention provides an olefin polymerization catalyst comprising chromium and titanium supported on silica. The catalyst is prepared with a low sodium ammonia-stabilized silica sol which has an average silicate particle size of from about 2 to about 6 nm. The catalyst produces polyethylene or a copolymer of ethylene and another olefin selected from the group consisting of the C.sub.3 to C.sub.8 mono 1-olefins, the polymer having a high melt index and a narrow molecular weight distribution.

Abstract: This application relates to a catalyst and a process using this catalyst to convert or destroy organic compounds including organohalogen compounds. A preferred catalyst contains as catalytic components titania, vanadium oxide, tungsten oxide, tin oxide and at least one noble metal selected from the group consisting of platinum, palladium and rhodium, characterized in that the vanadium oxide, tungsten oxide and noble metals are uniformly dispersed on the titania. The process of this invention comprises contacting the gas stream, which contains organohalogen compounds and other organic compounds, at a temperature of about 200.degree. to about 500.degree. C. with the catalyst described above in the presence of an oxidizing agent and water. The oxidizing agent can be oxygen or air.

Abstract: Chromium in solid waste residues may be immobilized by reduction of essentially all of the Cr(VI) to insoluble Cr(III). The Cr(VI) is separated from the solids by contacting with an acid to produce an aqueous solution having a pH of about 6.5 to 9.5, then adding sulfate-reducing anaerobic bacteria and, as required, a source of sulfates and nutrients for the growth of the bacteria. Where the solid residues are below the surface of the soil, a continuous recirculation may be established to extract Cr(VI), treat the resulting solution above grade to reduce Cr(VI) to Cr(III), and return the treated solution to the soil.

Abstract: The instant invention is a membrane useful for separating organic matter such as proteins from aqueous solutions which resists fouling and maintains a high flux during separation. The membrane is prepared by either drying a polysulfone composite membrane, or first treating a polysulfone composite membrane with aqueous methanol and then drying it. The membrane is then exposed to elemental fluorine in an inert gas in the substantial absence of oxygen at a temperature in the range of about -45.degree. to 70.degree. C. After fluorine treatment, the membrane is exposed to air. The fluorine content in the treatment mixture may be from 0.0125 to about 10 volume percent, preferably 0.025 to 2 volume percent. The fluorine treatment does not significantly alter the membrane pore size.

Abstract: Processes for using a thin film ultrafiltration membrane for the separation of low molecular weight solutes such as the separation of glucose from sucrose and higher molecular weight sugars and the separation of amino acids from oligopeptides and polypeptides. The membrane possesses desirable properties or characteristics, and may be prepared by casting a solution of a polyelectrolyte complex on a microporous support to form a thin film of polyelectrolyte complex on the surface of the support. The thickness of the membrane will range from about 600 to 3,000 A.

Abstract: A predetermined pattern of a dielectric polymer is formed on a substrate from a mixture of prepolymers which are the ethers of the oligomeric condensation product of (a) dihydric phenol and formaldehyde and (b) a dialdehyde and 3 to 4 moles of a phenol.

Abstract: Optical fiber coatings may be prepared from compositions containing a vinyl ether oligomer prepared by reacting an hydroxyl-terminated polyester or polyether, a diisocyanate, and a hydroxy monovinyl ether, with mono or multifunctional vinyl ether terminated monomers, which may be derived from esters or alcohols.

Abstract: This invention relates to a process for the preparation of a crystalline compound having an empirical formula LaCr.sub.x A.sub.1-x O.sub.4 .multidot.yH.sub.2 O where A is a metal selected from the group consisting of Mg, Sr, Ca and Ba, x ranges from 0.99 to about 0.7 and y ranges from 0 to 0.15. The process comprises adding a solution of the appropriate metal salts to a solution of ammonium hydroxide thereby precipitating a hydroxide gel intermediate, which is dried and calcined in air to yield the resultant crystalline compound which has a huttonite structure. Additionally, this invention relates to a process for the preparation of a ceramic powder having the empirical formula LaCr.sub.x A.sub.1-x O.sub.3, where A is a metal selected from the group consisting of Mg, Sr, Ca and Ba and x ranges from 0.99 to about 0.7. Finally, a ceramic composition having the empirical formula LaCr.sub.x S.sub.1-x O.sub.4 .multidot.yH.sub.2 O having a huttonite structure is also disclosed.

Abstract: A fluid feed mixture, either liquid or gaseous in nature, may be subjected to a gas enrichment separation process. The process is effected by contacting the mixture with the upstream face of a mixed matrix membrane which comprises an organic polymer having a solid particulate adsorbent incorporated therein, the permeability coefficient of the organic polymer being compatible with the permeability coefficient of the adsorbent. The permeate which emanates from the downstream face of the membrane comprises a fluid product mixture in which the proportion of the first fluid component of the feed mixture, which possesses a greater steady state permeability in relation to the second fluid component, is greater than the proportion present in the original fluid feed mixture.

Abstract: A predetermined pattern of a dielectric polymer is formed on a substrate from a prepolymer which is an ether of the oligomeric condensation product of a dihydric phenol and formaldehyde having the formula ##STR1##

Abstract: This invention relates to a high durability catalyst for treating automotive exhaust gas which produces a minimal amount of hydrogen sulfide and is essentially free of cerium oxide and which comprises a support consisting substantially of delta alumina, an effective amount of a promoter consisting essentially of barium oxide and, optionally, lanthanum oxide, and, effective amounts of the noble metals palladium and rhodium deposited on the support.In an additional embodiment of the invention,m the support may contain delta alumina, and, optionally zirconia, and the catalyst may contain an overlayer containing delta or gamma alumina, and optionally, zirconia. Effective amounts of the noble metals palladium and rhodium may be deposited on the support and/or on the overlayer.In another aspect, the invention resides in a process for treating the exhaust gases from automotive engines to remove carbon monoxide, hydrocarbons, and nitrogen oxides, and to minimize the production of hydrogen sulfide.

Abstract: A predetermined pattern of a dielectric polymer is formed on a substrate from a mixture of prepolymers which are ethers of the reaction products of (a) a dicyclopentadiene and a phenol and (b) a dialdehyde and 3 to 4 moles of a phenol.