Abstract: The invention relates to a method of extracting gold from a gold-containing material. The invention provides a process of extracting precious metals from a precious metal-containing material comprising mixing the material in a finely-divided state with an alkaline cyanide solution to form a mixture and recovering the metal from solution by known methods characterized in that said process is carried out in the presence of peroxymonosulfuric acid or salt thereof and, where necessary, adding oxygen or a source thereof to said mixture to provide a dissolved oxygen level of at least about 6 ppm.In a preferred embodiment the process is used in conjunction with a carbon-in-pulp plant. In the preferred process ore slurry 2 is passed through a valve means 3a to a wood screen 5 via line 4a. The slurry is separated from waste wood splinters 5a under gravity to a reservoir 6 where it is combined with an alkaline cyanide solution 7 introduced via line 4b and metering pump 8a.

Abstract: Separation of an aliphatic aminonitrile or an aliphatic diamine from a mixture containing the corresponding cyclic, aliphatic, mono-unsaturated amine by adding caustic compound to the mixture and then distilling the aminonitrile or the diamine at a temperature less than 170.degree. C. and at a pressure of less than 1 atmosphere.

Abstract: Copolyamides are prepared by the non-catalytic polymerization of an omega-aminonitrile with a mixture of a diamine and a dicarboxylic acid. Not more than 40% by weight of the product is derived from the omega-aminonitrile.

Abstract: Hydrogenation of a polyene to a monoene using a ruthenium catalyst that is promoted with a sterically-hindered tertiary amine.

Abstract: Partial hydrogenation of 1,5,9-cyclododecatriene to form cyclododecene using ruthenium catalyst and a solvent selected from the group consisting of esters and ethers having a boiling point higher than 245 degrees C.

Abstract: Preparation of polyester resins from dimethylterephthalate by forming bis(2-hydroxyethyl) terephthalate, and using a portion of this product as solvent for one or more dicarboxylic acids and one or more dihydric alcohols, reacting the acids and alcohols, and combining the portions, and polymerizing the mixture.

Abstract: A process for the manufacture of adipic acid by reacting 1,3-butadiene or an allylic butenol or the like with carbon monoxide and water using a rhodium catalyst and an HI or HBr promoter, removing adipic acid from the reaction mixture, and reacting at least part of the remaining portion of the reaction mixture to form additional adipic acid.

Abstract: Purification of 6-aminocapronitrile by heating a mixture containing same and THA and converting the THA to higher boiling compounds, and then distilling the 6-aminocapronitrile. The time required to convert the THA is reduced if an organic carbonyl compound is present in the mixture during heating.

Abstract: A mixture containing 6-aminocapronitrile is purified by reacting the tetrahydroazepine contained therein with a methylene compound, and then distilling the 6-aminocapronitrile from the resulting mixture.

Abstract: Process for producing 2-alkylhexahydropyrimidines from 1,3-diamines and alkyl nitriles using a hydrogenation catalyst.

Abstract: Preparation of 3-pentenoic acid from butadiene, water and carbon monoxide in an organic acid solvent in the presence of a rhodium catalyst and a bromide or iodide promoter.

Abstract: Acetic acid is recovered from the mother liquor used to oxidize para-xylene to terephthalic acid by adding at least one organic compound having a melting point below 140.degree. C. and an atmospheric boiling point above 230.degree. C.

Abstract: Purification of 6-aminocapronitrile by reduction of tetrahydroazepine with a hydride, and then distilling the 6-aminocapronitrile at a pot temperature of less than about 200.degree. C.

Abstract: A fluorescent resin suitable for use as a paper strength enhancing additive having the formula: ##STR1## where each R is independently selected from the class consisting of methyl and hydrogen, X is a halogen selected from the group consisting of Cl, Br and I, and n is the integer 8 or a larger integer.

Abstract: Process for preparing a new compound: [hexakis(pentenenitrilo)nickel II]bis[.mu.-(cyano)bis(triphenylborane)(I)] which is useful as a promoter in the hydrocyanation of 3 or 4-pentenenitrile.