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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 4754070 B1

PDFFull Text
Date of Patent:
Jun. 28, 1988

Filed:

Jan. 23, 1986

Hydrogenation of methylenedianiline to produce

Applicant:
Inventors:

Jeremiah P Casey, Emmaus, PA (US);

Michael J Fasolka, Pennsburg, PA (US);

Assignee:

Air Products and Chemicals, Inc., Allentown, PA (US);

Attorneys:

Brewer; Russell L.

Simmons; James C.

Marsh; William F.

Primary Examiner:

Glennon H Hollrah

Assistant Examiner:

John A Sopp

Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564451 ; 564452 ;
Abstract

This invention relates to an improved hydrogenation process wherein methylenedianiline is reduced to form bis(para-aminocyclohexyl)methane (PACM). The process contemplates contacting methylenedianiline and hydrogen in the presence of a two component metal catalyst comprising rhodium and ruthenium under mild hydrogenation conditions. Use of the mixed metal catalyst system allows one to obtain a preselected isomer ratio having from about 5-40% by weight, typically 14-28% by weight of the trans,trans- configurational isomer.

Find Patent Forward Citations

Casey, Jeremiah. (1988). Hydrogenation of methylenedianiline to produce (U.S. Patent No. 4754070). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4754070

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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