Tenneco Chemicals, Inc.

Eugene P Di Bella

Donald A Keyworth

Marvin Rosen

Organic phosphates are prepared in good yields by contacting the corresponding organic phosphite with an oxygen-containing gas that is preferably oxygen in the presence of a catalyst that comprises nitrogen dioxide in amounts that will provide at least 0.40 mole of oxygen and from 0.01 mole to 0.25 mole of nitrogen dioxide catalyst per mole of phosphite at a temperature in the range of -30.degree. C. to 120.degree. C.

Process for the production of organic phosphates

Organic phosphates are prepared in good yields by contacting the corresponding organic phosphites with nitric acid in the amount of at least 0.40 mole of nitric acid per mole of phosphite at a temperature in the range of 0.degree. to 60.degree. C.

Process for the production of organic phosphates by nitric acid

1,1,2,3,4,4-Hexabromobutene 2 is used to impart flame-retardance to polyolefins and other thermoplastic organic polymers that are normally susceptible to burning.

Flame-retardant resinous compositions

A process for the removal of mercury from aqueous solutions that have dissolved therein mercuric salts, organomercury compounds, or mixtures thereof comprises (a) contacting the solutions with an amount of hypophosphorus acid, phosphorous acid, or a water-soluble salt of hypophosphorus acid or phosphorous acid that is sufficient to reduce the mercuric and organomercuric ions in the solution to mercury and (b) separating the precipitated mercury from the solution.

Process for the removal of mercury from aqueous solutions

Monochlorotoluene that contains at least 45 percent of para-chlorotoluene is prepared by contacting toluene with chlorine in the presence of a catalyst system that contains a ferrocene compound and a sulfur compound.

Chlorination of toluene

Dichlorotoluene that contains at least 55 percent of 2,5-dichlorotoluene is prepared by contacting ortho-chlorotoluene with chlorine in the presence of a chlorination catalyst that is either a metal sulfide or a mixture of a ring-chlorination catalyst and a co-catalyst that is a sulfur compound to form a reaction mixture containing ortho-chlorotoluene, dichlorotoluene, and trichlorotoluene and separating dichlorotoluene from the reaction mixture.

Process for the production of 2,5-dichlorotoluene

Dichlorotoluene that contains at least 35 percent of 3,4-dichlorotoluene is prepared by contacting para-chlorotoluene with chlorine in the presence of a chlorination catalyst that is either a metal sulfide or a mixture of a ring-chlorination catalyst and a co-catalyst that is a sulfur compound to form a reaction mixture containing para-chlorotoluene, dichlorotoluene, and trichlorotoluene and separating dichlorotoluene from the reaction mixture.

Process for the production of 3,4-dichlorotoluene

Substituted indazoles that have the structural formula ##SPC1## Wherein X represents halogen, trihalomethyl, nitro, -SO.sub.2 R, cyano, acoyl, acoylamino, aroylamino, or -COOR'; R represents hydroxyl, halogen, alkyl, haloalkyl, alkylamino, phenyl, or substituted phenyl; R' represents hydrogen, halogen, alkyl, haloalkyl, phenyl, or substituted phenyl; and n represents a number in the range of 1 to 4 are prepared by the direct nitrosation of the corresponding 2-methylacetanilide with an alkali metal nitrite or alkaline earth metal nitrite under conditions of controlled acidity in the presence of a dehydrating agent at a temperature in the range of 50.degree. to 120.degree. C.

Process for the preparation of substituted indazoles

An emulsion suitable for use as a flame-retardant for textile materials is prepared by dissolving 1,1,2,3,4,4-hexabromobutene-2 in an N-alkylpyrrolidinone in which the alkyl group has from 1 to 5 carbon atoms to form a solution containing from 15 to 50% by weight of 1,1,2,3,4,4-hexabromobutene-2, diluting this solution with an aromatic hydrocarbon, and mixing the resulting solution with a non-ionic emulsifying agent and water to form the emulsion.

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Piscataway, NJ, United States of America

Eugene P Di Bella