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:
Jun. 14, 1983
Filed:
Jul. 21, 1980
Applicant:
Inventors:
Helmut Westernacher, Haltern, DE;
Franz Schamann, deceased, late of Marl, DE;
Assignee:
GAF Huls Chemie GmbH, Marl, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
252412 ; 252416 ; 568855 ;
Abstract
A process for regenerating suspended heavy metal catalysts used in the synthesis of butynediol from acetylene and formaldehyde. The aqueous catalytic slurry removed from the reaction mixture is raised to a temperature of about 200.degree. to 500.degree. C., where appropriate with air supplied, and is left at this temperature with air being supplied, until the carbon content of the catalytic substance is about 0.5 to 3%.