E.i. Dupont De Nemours and Company

Morris Rapoport

Willie Jon Barnette

William Randolph Leyendecker

Jesse Oris White

Farland E Henry

Hydrocyanation of butadiene using a mixed ligand zerovalent nickel catalyst wherein the mixture of phosphite ligands there is 10 to 65 mol percent phenyl, and a complemental amount of meta- and para-tolyl.

Hydrocyanation of butadiene

Process for production of dinitriles using zero-valent nickel catalysts having low ligand ratio, and low amounts of zinc halide as the promoter.

Continuous hydrocyanation process using zinc halide promoter

Process for recovery of zerovalent nickel organophosphorus containing catalyst from a hydrocyanation product stream by controlling the level of unreacted mononitriles in the stream causing the thus treated stream to form two phases and recovering catalyst from the heavier phase.

Recovery of zerovalent nickel complexes

An improved process for the production of dinitriles, e.g., adiponitrile, by the hydrocyanation of 3- and/or 4-pentenenitriles using a zero-valent nickel complexed with a phosphorus containing ligand as a catalyst with a molar ratio of total ligand to nickel of about 5.0-7.8.

Hydrocyanation of olefins

Use of ammonia to control interfacial rag formation when olefin hydrocyanation products are contacted with a hydrocarbon.

Treatment of olefin hydrocyanation products

An improved process for the production of dinitriles, e.g., adiponitrile, by the hydrocyanation of 3 and/or 4-pentenenitriles by control of temperature and the amount of hydrogen cyanide relative to the other compounds participating in the reaction.

An improved process for the production of dinitriles, e.g., adiponitrile, by the hydrocyanation of 3 and/or 4-pentenenitriles by staging the introduction of hydrogen cyanide to the reaction.

Preparation of cyclohexyl hydroperoxide substantially free of other peroxides by oxidation of cyclohexane containing a cyclohexane soluble cobalt salt in a zoned oxidation process in which an oxygen containing gas is fed to each zone in the oxidation section in an amount in excess of that which will react under the conditions of that zone.

Growing community of inventors

Orange, TX, United States of America

Morris Rapoport