American Cyanamid Company

Cytec Technology Corporation

Cytec Technologies Corp.

John H Bright

Robert G Lees

Jeno G Szita

Lon-Tang Wilson Lin

Barry A Lawless

Christos Savides

Joseph Lawrence Schmitt, Jr

Erwin Klingsberg

John P Dundon

Described is a liquid, partially alkoxymethylated melamine crosslinker composition having from about 2.6 to about 4.6 moles of combined formaldehyde per mole of melamine, from about 1.4 to about 4.4 moles of alkyl per mole of melamine, from about 1.3 to about 3.4 moles of NH per mole of melamine, a free formaldehyde level of less than about 0.5 weight percent based on 100 percent solids, and an N-methylol level of less than about 6.0 weight percent; processes for its preparation; a low formaldehyde emitting curable composition containing the crosslinker; as well as a method of coating a substrate and substrates so coated.

Low formaldehyde emitting crosslinking agents, process of preparation and curable compositions thereof

Low formaldehyde emitting crosslinking agents, process of preparation

The present invention relates to the selective extraction of rhenium metal from aqueous sulfuric acid solutions. More particularly, it relates to the selective extraction of rhenium metal from sulfuric acid leach solutions, resulting from the leaching of spent petroleum reforming catalysts, by the use of tertiary phosphine oxide extraction compounds.

Selective extraction of rhenium from aqueous sulfuric acid solutions

Yield of methyl-6-methoxy-1-naphthalene carboxylate is increased by reacting dimethyl sulfate with 6-hydroxy-1-naphthoic acid in organic solvent having flash point greater than 10.degree. C. and that is insoluble in water, in presence of mixed carbonates and hydroxides of alkali metal.

Process for the preparation of 6-methoxy-1-naphthoic acid, methyl esters

A method for the extraction of lower alcohols from aqueous solutions by contacting said solutions with various phosphine oxides, in the presence or absence of alkali or alkaline earth metal salts, is disclosed.

Extraction of alcohols with phosphine oxides

A method for the extraction of certain amino acids from aqueous solutions by contacting said solutions with various dithiophosphinates in conjunction with a polar diluent is disclosed.

Extraction of amino acids from aqueous solution with dithiophosphinates

A method for removing halogenated hydrocarbons from water is disclosed. The method comprises contacting said aqueous solution with a phosphine oxide either alone or on a solid support.

Extraction of halocarbons from aqueous solutions

A process for the extraction of phenolic compounds from aqueous solutions is disclosed. The process comprises contacting said aqueous solution with an organic solution comprising at least one tertiary phosphine oxide and a high boiling organic solvent.

Extraction of phenols from aqueous solutions

3-Nitrobenzoic acid is recovered from a mixture of 2-, 3- and 4-nitrobenzoic acids by basifying to a pH of 8-12 and then adding an acid to reduce the pH to 1.5-3.5 to precipitate the desired compound.

Process for recovering 3-nitrobenzoic acid

N,N-Dimethylaminobenzoic acids are prepared by a two-step process of reductively alkylating nitrobenzoic acid in methanol in the presence of a palladium catalyst.

Process for preparing N,N-dimethylaminobenzoic acids

Aryl[4,4'-bis(di-loweralkylamino)benzhydryl]-sulfones are prepared by reacting a 4-di(loweralkylamino)benzaldehyde with a di(loweralkyl)aniline and an aryl sulfinate.

Process for preparing

A process is provided for preparing bis(hydroxymethyl)methylphosphine oxide, comprising (1) thermally rearranging tris(hydroxymethyl)phosphine at elevated temperatures in the presence of a catalytic amount of a strong, non-oxidizing acid, having an ionization constant greater than 10.sup.-3, or a source thereof, to obtain the desired bis(hydroxymethyl)methylphosphine oxide, and (2) recovering the latter compound from the reaction mixture.

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Kendall Park, NJ, United States of America

John H Bright