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:
Aug. 23, 1977
Filed:
Sep. 29, 1975
Applicant:
Inventors:
Hans-Josef Buysch, Krefeld-Bockum, DT;
Jurgen Heuser, Krefeld, DT;
Assignee:
Bayer Aktiengesellschaft, , DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
2606 / ; 260592 ;
Abstract
An improved process for the preparation of an .alpha.,.alpha.,.alpha.',.alpha.'-tetramethyl-phenylene-biscarbinol by the oxidation of at least one diisopropyl benzene with air or oxygen at elevated temperatures in the presence of an aqueous solution of a strong alkali, the improvement comprises carrying out the oxidation with a carbinol content of at least 52% by weight in the organic phase and an alkali concentration of at least 8% by weight based on the aqueous phase and 1 to 10% by weight based on the organic phase.