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:
Apr. 17, 1990
Filed:
May. 26, 1989
Applicant:
Inventors:
Norbert Breitkopf, Oberhausen, DE;
Wolfgang Hofs, Oberhausen, DE;
Heinz Kalbfell, Schermbeck, DE;
Franz Thonnessen, Oberhausen, DE;
Peter Lappe, Dinslaken, DE;
Helmut Springer, Oberhausen, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
568854 ; 568853 ;
Abstract
Preparation of 2,2-dimethylpropanediol-1,3 by the aldol addition of isobutyraldehyde and formaldehyde using tri-n-propylamine as a catalyst, followed by hydrogenation of the reaction mixture, and subsequent distillation of the hydrogenation product in the presence of isobutanol and water.