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. 25, 1978
Filed:
Oct. 14, 1976
Applicant:
Inventor:
Samuel N Holter, Pittsburgh, PA (US);
Assignee:
Koppers Company, Inc., Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2606 / ; 260625 ;
Abstract
Mono-substituted alkylresorcinol isomers, predominantly the 5-alkylresorcinol isomer, are produced by reacting resorcinol and an aliphatic alcohol having 1-3 carbon atoms in the vapor phase in the presence of an acidic catalyst and by separating the resulting mono-substituted alkylresorcinol isomers from other alkylated hydroxyaromatic compounds and unreacted resorcinol. The molar ratio of alcohol to resorcinol is in the range of greater than 1:1 to 3:1. The reaction time in a batch operation and the liquid hourly space velocity in a continuous operation are controlled so not to allow the mono-substituted alkylresorcinol to undergo further alkylation.