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.:
Date of Patent:
Dec. 07, 1993
Filed:
Jun. 11, 1990
Otto Immel, Krefeld, DE;
Dietrich Liebsch, Leverkusen, DE;
Hans-H Schwarz, Krefeld, DE;
Stephan Wendel, Leverkusen, DE;
Peter Fischer, Odenthal-Osenau, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
This invention relates to a process for the preparation of an iron catalyst used for the hydrogenation of organic compounds comprising partially oxidizing iron or an iron alloy in particulate form at an elevated temperature in the presence of gaseous oxygen until a weight gain of from 5% to 32% is obtained; and then reducing the partially oxidized iron or iron alloy at an elevated temperature in a stream of hydrogen. The invention also relates to a process for the preparation of primary amines comprising catalytically hydrogenating nitriles corresponding to said primary amines in the presence of an iron catalyst of the invention.