Abstract: An alkali metal or ammonium bisulfite or metabisulfite added incrementally to a polymerizing aqueous solution of dimethyldiallylammonium halide enables control of the intrinsic viscosity of the resulting polymer within desired limits without adverse effect on monomer conversion.

Abstract: Benzene is admixed and reacted continuously with a mixed acid containing 3-7.5% nitric acid, 58.5-66.5% sulfuric acid, and 28-37% water under pressure sufficient to maintain benzene in liquid state until complete conversion of nitric acid is achieved to provide mononitrobenzene containing less than 500 ppm dinitrobenzene.

Abstract: Modification of a polyacrylamide to provide a content of N-hydroxymethyl groups thereon results in a selective flocculant which is effective in separating mineral values from an ore or mixture.

Abstract: The use of a secondary alcohol or an ethoxylated secondary alcohol in conjunction with conventional fatty acid in the flotation of non-sulfide minerals eliminates or reduces requirements for fuel oil usage.

Abstract: An improved carbon-supported hydrodesulfurization catalyst is obtained when the support first has deposited thereon a molybdenum compound convertible to MoS.sub.2, said molybdenum compound is converted to MoS.sub.2, and subsequently additional molybdenum compound, if necessary, and a metal compound selected from nickel and cobalt compounds are deposited thereon.

Abstract: Acrylic fibers of a fiber-forming first acrylonitrile polymer containing at least 50% acrylonitrile, a flame retardant amount of a halogen-containing vinyl monomer, and any balance of a halogen-free vinyl monomer having heterogeneously dispersed therein a small amount of an incompatible, halogen-free, second acrylonitrile polymer containing at least 70% acrylonitrile and one or more halogen-free vinyl monomers. The fibers are prepared by wet-spinning an intimate mixture of the polymers separately dissolved in aqueous inorganic solutions of the same salt following conventional procedures but including a hot-wet relaxation of the stretched wet-gel filaments prior to drying.

Abstract: Carbon particulates comprising carbon black spheres and a carbon binder having large pores as well as desirable pore size distributions are disclosed which are useful as selective adsorbants. A method of preparation and various uses are also disclosed.

Abstract: Improved recovery of non-sulfide minerals is provided in froth foltation by use of alcohol ethoxylate partial esters of polycarboxylic acids as collectors.

Abstract: Acrylic acid polymers of specified composition and solution viscosity are selective flocculants for iron values derived from hematitic ores in the presence of non-ferrous minerals.

Abstract: An anionic polymer of acrylamide having a skewed molecular weight distribution such that about 60% of said polymer has a molecular weight of about 500 to 2,000 and about 10% of said polymer has a molecular weight of about 4,000 to 12,000 has been discovered. The process of manufacturing this skewed molecular weight distribution anionic polymer is described. Its use as a scale inhibitor for controlling the deposition of adherent scales on the walls of vessels or pipes, and as an anti-precipitant for keeping alkaline earth cations in solution is also described. The use of the anionic polymer of acrylamide consisting of a skewed molecular weight could be used in recirculating water systems, boilers, and in evaporative and reverse osmosis desalination systems.

Abstract: Under specified conditions of reaction, a substantially pure aqueous solution of diallyldimethylammonium fluoride monomer can be polymerized to provide corresponding polymers having an intrinsic viscosity of at least about 0.1 deciliter per gram measured in 1.0 N NaCl solutions.

Abstract: An improved process for suppression of oxides of nitrogen arising from heat treatment of catalyst materials containing a source of such oxides is provided which comprises separately introducing the catalyst material and urea into the heating zone and then effecting heat treatment.

Abstract: High molecular weight poly(allyltrialkylammonium) salt flocculants are obtained by preparing a preliminary poly(N,N-dialkylacrylamide), reducing the preliminary polymer to form an intermediate poly(allyldialkylamine), and quaternizing the intermediate polymer to form the final polyquaternary salt.

Abstract: A process for recovery of iron from an iron mud containing a mixture of gypsum and ferric hydroxide, which comprises contacting said gypsum and ferric hydroxide mixture with sulfuric acid of a concentration between 93 and 98% for a period of 1 to 12 hours, removing the undissolved material and recovering the iron as a 25 to 50% ferric sulfate solution.

Abstract: Reductive deposition of a platinum metal on a preformed porous carbon support provides increased intensity ratios of support/platinum metal as the average pore radius of the carbon support increases.

Abstract: A hydrodesulfurization catalyst consisting essentially of a carbon support carrying thereon at least 10 and up to 20 weight percent of a first metal selected from tungsten and molybdenum and from about 2 to 10 weight percent of a second metal selected from cobalt and nickel, said metals being in the form of their sulfides and said catalyst having an average pore radius of at least 25 angstrom units and a compacted bulk density of about 0.3-0.8 gram per cc. provide advantages in the hydrodesulfurization of petroleum residuum.

Abstract: Carbon particulates comprising carbon black spheres and a carbon binder having large pores as well as desirable pore size distribution are disclosed which serve as catalyst supports. The support carrying an effective amount of an activator is an active catalyst composition for a variety of reactions including reduction reactions.

Abstract: Carbon particulates comprising carbon black spheres and a carbon binder having large pores as well as desirable pore size distributions are disclosed which are useful as selective adsorbants. A method of preparation and various uses are also disclosed.

Abstract: Shaped catalyst particles having a polylobal cross-section are utilized in hydrotreating a petroleum residuum to obtain a desulfurized product. The catalyst particles have a surface area greater than 150 m.sup.2 /g and a catalyst pore volume of 0.35-0.85 cc/g resulting from a major portion of pores of diameters in the range 40-90A.

Abstract: Vulcanizable elastomeric compositions are disclosed which are the reaction products of 80 to 90 mole percent of a mixture of thiodiethanol and one or more aliphatic or cycloaliphatic diols and 20 to 10 mole percent of an aromatic or cycloaliphatic dicarboxylic acid wherein the diol content is at least 50 mole percent thiodiethanol and about 1 to 10 mole percent of a diol providing pendant allylic unsaturation.