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:
Jan. 22, 1991
Filed:
Nov. 21, 1989
Applicant:
Inventors:
Johan G Bitter, Amsterdam, NL;
Johannes L den Boestert, Amsterdam, NL;
Wilhelmus J Weeres, Amsterdam, NL;
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568758 ; 568749 ; 568756 ;
Abstract
The invention relates to a process for the separation of a phenol from a mixture obtained by the carboxylation of the phenol and containing phenol, phenolate and the carboxylation products thereof, which process comprises separation carried out by selectively absorbing the phenol into the wall of a membrane, solubilizing the phenol in the membrane matrix, diffusing the phenol through the membrane and desorbing the phenol from the other wall.