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:
Mar. 06, 1979
Filed:
Jun. 13, 1978
Applicant:
Inventors:
John R Bamforth, Middlesbrough, GB;
Raymond Higgins, Middlesbrough, GB;
Assignee:
Imperial Chemical Industries Limited, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2606 / ;
Abstract
Compounds of formula R.sub.1 R.sub.2 C .dbd. CR.sub.3 CHR.sub.4 R.sub.5 wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are selected individually from hydrogen, akyl, aryl, cyano, cyclohexyl, halide groups and substituted derivatives of these groups are oxidatively dimerized in the presence of a partially reduced bismuth oxide catalyst, the average degree of reduction of bismuth oxide being 1 to 70%, and in the presence of oxygen, the oxygen conversion being in the range 90 to 99%.