Mark A Harper

US Patent:

6680403, Jan 20, 2004

Filed:

Oct 25, 2001

Appl. No.:

10/030369

Inventors:

Alex Sergey Ionkin - Newark DE
Stanislaw Bodgan Ziemecki - Wilmington DE
Mark J. Harper - Lewes DE
Theodore Augur Koch - Wilmington DE
Henry Edward Bryndza - Avondale PA

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C07C25504

US Classification:

558459

Abstract:

Provided is a selective hydrogenation process for producing aminonitriles by contacting the corresponding dinitriles with a hydrogen-containing fluid in the presence of a hydrogenation catalyst, a solvent and an additive for improving the yield of and/or selectivity to the aminonitrile. The additive comprises a carbon monoxide; a tetraalkylammonium hydroxide compound; a tetraalkylphosphonium hydroxide compound; a multi-centered metal carbonyl cluster; an organic isonitrile; a cyanide compound having at least one cyano group bound to other than a carbon atom; and afluoride compound.

US Patent:

59861274, Nov 16, 1999

Filed:

Mar 15, 1999

Appl. No.:

9/268148

Inventors:

Alex Sergey Ionkin - Newark DE
Stanislaw Bogdan Ziemecki - Wilmington DE
Mark Jay Harper - Lewes DE
Theodore Augur Koch - Wilmington DE

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C07C25500

US Classification:

558459

Abstract:

A process for selectively hydrogenating a dinitrile to an aminonitrile is provided. The process comprises contacting a dinitrile with a hydrogen-containing fluid in the presence of a solvent comprising an alcohol or liquid ammonia, at least one metal catalyst, and a carbonyl group-containing additive such as, for example, organic amides, organic esters, salts of carboxylic acids or urea.

US Patent:

60872969, Jul 11, 2000

Filed:

Nov 5, 1998

Appl. No.:

9/186987

Inventors:

Mark Jay Harper - Middletown DE

Assignee:

E. I. du Pont de Nemours & Co. - Wilmington DE

International Classification:

B01J 2500
C07C25504

US Classification:

502301

Abstract:

The present invention relates to a Raney catalyst comprising iron, cobalt, a third metal wherein the third metal is selected from the group consisting of nickel, rhodium, ruthenium, palladium, platinum, osmium, iridium and mixtures of any of these metals.

US Patent:

61566942, Dec 5, 2000

Filed:

Nov 5, 1998

Appl. No.:

9/186839

Inventors:

Mark Jay Harper - Middletown DE

Assignee:

E. I. Dupont De Nemours & Company - Wilmington DE

International Classification:

B01J 2502
B01J 2340
C07C25500
C07C 6952
C07C20900

US Classification:

502301

Abstract:

The present invention relates to a Raney catalyst comprising iron, cobalt, a third metal wherein the third metal is selected from the group consisting of nickel, rhodium, ruthenium, palladium, platinum, osmium, iridium and mixtures of any of the metals of this group.

US Patent:

63316242, Dec 18, 2001

Filed:

Apr 5, 2000

Appl. No.:

9/543766

Inventors:

Theodore Augur Koch - Wilmington DE
Alan Martin Allgeier - Wilmington DE
Mark Jay Harper - Lewes DE
Sourav Kumar Sengupta - Wilmington DE

Assignee:

E.I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C07D20102

US Classification:

540538

Abstract:

A process for the production of 6-aminocaproamide comprising reacting 5-cyanovaleramide with hydrogen in the presence of a metal catalyst. The 6-aminocaproamide is useful, for example, in the production of caprolactam and nylon 6.