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:
Jul. 18, 1978
Filed:
May. 07, 1976
Hans Juergen Nienburg, Heidelberg, DE;
Rudolf Kummer, Frankenthal, DE;
BASF Aktiengesellschaft, Ludwigshafen am Rhein, DE;
Abstract
An improved process for the production of aliphatic or cycloaliphatic dialdehydes or acetals of the same by reaction of an aliphatic or cycloaliphatic conjugated diene with carbon monoxide and hydrogen in the presence of a rhodium catalyst which is modified with a tertiary phosphine or phosphite at a temperature of from 70.degree. to 160.degree. C and at a pressure of from 100 to 600 atmospheres, the improvement consisting in using as catalyst a rhodium complex which contains carbon monoxide, a tertiary organic phosphine or tertiary organic phosphite and a halogen atom as ligands. Aliphatic and cycloaliphatic dialdehydes or the acetals of the same are suitable for the production of the corresponding diols which may be used in the production of polymers and particularly of polyurethanes.