Invista North America S.a.r.l.

Ron Ozer

Thomas Foo

Paul S Pearlman

Ronald James McKinney

James Michael Garner

Sigridur Soley Kristjansdottir

The invention provides a hydrocyanation process to produce adiponitrile and other dinitriles having six carbon atoms, in the presence of catalyst composition comprising a zero-valent nickel and at least one bidentate phosphorus-containing ligand wherein the bidentate phosphorus-containing ligand gives acceptable results according to at least one protocol of the 2-Pentenenitrile Hydrocyanation Test Method.

Hydrocyanation of pentenenitriles

The invention provides an integrated, continuous process for the production of 3-pentenenitrile, the refining of 3-pentenenitrile, and the refining of 2-methyl-3-butenenitrile, the process comprising:

Process for making and refining 3-pentenenitrile, and for refining 2-methyl-3-butenenitrile

The invention provides a continuous process for the production of 3-pentenenitrile, comprising:

Process for making 3-pentenenitrile by hydrocyanation of butadiene

A hydrocyanation process produces adiponitrile and other dinitriles having six carbon atoms. The process involves forming a reaction mixture in the presence of at least one Lewis acid. The reaction mixture includes ethylenically unsaturated nitrites having five carbon atoms, hydrogen cyanide, and a catalyst precursor compositions. The reaction mixture is continuously fed while controlling the overall feed molar ratio of 2-pentenenitriles to all unsaturated nitriles and the overall feed molar ratio of hydrogen cyanide to all unsaturated nitrites. In the reaction product mixture, including adiponitrile, the ratio of the concentration of 2-pentenenitriles to the concentration of 3-pentenenitriles from about 0.2/1 to about 10/1. Included in the catalyst precursor composition is a zero-valent nickel and at least one multidentate phosphorus-containing ligand. The multidentate phosphorus-containing ligand may be a phosphite, a phosphonite, a phosphinite, a phosphine, and a mixed phosphorus-containing ligand or a combination of such members.

Hydrocyanation process with reduced yield losses

The invention provides a continuous process for the production of 3-pentenenitrile comprising: wherein Rand Rare independently selected from the group consisting of Cto Chydrocarbyl, and R, R, R, R, Rand Rare independently selected from the group consisting of H and Cto Chydrocarbyl; and

A hydrocyanation process produces adiponitrile and other dinitriles having six carbon atoms. The process involves forming a reaction mixture in the presence of at least one Lewis acid. The reaction mixture includes ethylenically unsaturated nitriles having five carbon atoms, hydrogen cyanide, and a catalyst precursor composition. The reaction mixture is continuously fed while controlling the overall feed molar ratio of 2-pentenenitriles to all unsaturated nitriles and the overall feed molar ratio of hydrogen cyanide to all unsaturated nitriles. In the reaction product mixture, including adiponitrile, the ratio of the concentration of 2-pentenenitriles to the concentration of 3-pentenenitriles is from about 0.2/1 to about 10/1. Included in the catalyst precursor composition is a zero-valent nickel and at least one bidentate phosphite ligand.

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Wilmington, DE, United States of America

Ron Ozer