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:
Dec. 05, 1978
Filed:
Jan. 18, 1978
Luigi Cassar, Novara, IT;
Marco Foa, Novara, IT;
Montedison S.p.A., Milan, IT;
Abstract
This invention relates to a process for preparing phenylacetic acid. In particular, the present invention relates to a catalytic process for the synthesis of the alkaline salts of phenylacetic acid by carbonylation of benzyl halides in a diphase system in the presence of cobalt carbonyl complexes. More particularly, the present invention relates to a process for preparing alkaline salts of phenylacetic acid by reacting a benzyl halide selected from chloride and bromide with carbon monoxide in the presence of a catalyst consisting in a salt of cobalt hydrocarbonyl, characterized in that the reaction is conducted in an aqueous/organic diphase system consisting of (a) an aqueous solution of an inorganic alkaline base, and (b) the benzyl halide in an organic solvent, in the presence of a catalyst system composed by a quaternary alkylammonium salt and by a cobalt hydrocarbonyl salt, at atmospheric pressure and at a temperature ranging from 20.degree. to 70.degree. C about.