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:
Nov. 26, 1996
Filed:
Aug. 04, 1994
Applicant:
Inventors:
Dietrich Maschmeyer, Marl, DE;
Gerhard Thelen, Nottuln, DE;
Assignee:
Huels Aktiengesellschaft, Marl, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
502327 ; 502326 ; 502332 ; 502355 ;
Abstract
A catalyst for preparing bis-para-aminocyclohexylmethane by hydrogenation of methylenedianiline, comprising ruthenium or rhodium in an amount of from 0.05 to 8% by weight, applied in a layer thickness of from 5 to 150 .mu.m to a support comprising a calcined and surface-rehydrated transition alumina, wherein a suspension of 10 g of the transition alumina in 300 ml of water at 25.degree. C. has an equilibrium pH of at least 8.2 after 60 minutes and after addition of 10 ml of 0.1N hydrochloric acid to this suspension it has a pH of at least 6.0 after 30 minutes.