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. 08, 1992
Filed:
Apr. 24, 1992
Applicant:
Inventors:
Wolfgang Ruppert, Bickenbach, DE;
Willi Ploesser, Seeheim-Jugenheim, DE;
Assignee:
Rohm GmbH, Darmstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07B / ;
U.S. Cl.
CPC ...
562521 ; 560233 ;
Abstract
Methods of improving the yield in the continuous preparation of isobutyric acid from propene, carbon monoxide, and water under pressure in liquid hydrogen fluoride as a Koch catalyst by mixing the propene with excess carbon monoxide, preferably carbon monoxide reintroduced from the process and freed of HF, and introducing the mixture into the reactor.