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:
Oct. 19, 1976
Filed:
Oct. 21, 1974
Frank L Slejko, Bristol, PA (US);
James S Clovis, Morrisville, PA (US);
Rohm and Haas Company, Philadelphia, PA (US);
Abstract
This invention discloses an improved process for the manufacture of .alpha.,.beta.-unsaturated carboxylic acid esters from a .beta.-alkoxycarboxylic acid ester prepared by contacting an olefin having 2 to about 15 carbon atoms with an alcohol and carbon monoxide, where this alkoxycarbonylation reaction is performed with mutually independent improvements which include (A) reacting the compounds in the presence of a catalyst having as the major catalytic agent a salt of a platinum group metal and as a co-catalyst a salt of a metal selected from the group consisting of mercury (II) and tin (II), with a reoxidizing agent which is a salt of a multivalent metal having an oxidation potential more positive than the platinum group metal salt, (B) performing the reaction in an improved solvent system comprising the monohydric alcohol, the .beta.-alkoxycarboxylic acid ester and a solvent having a boiling point higher than that of the .beta.-alkoxycarboxylic acid ester, (C) reoxidizing the catalyst prior to isolation of the .beta.-alkoxycarboxylic acid ester from the reaction medium, and (D) cracking the .beta.-alkoxycarboxylic acid ester to the corresponding .alpha.,.beta.-unsaturated carboxylic acid ester.