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:
Feb. 28, 1989
Filed:
Oct. 01, 1986
Applicant:
Inventors:
Bernard Durand, Claix, FR;
Jean-Jacques Masini, Chaponost, FR;
Assignee:
Atochem, Puteaux, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
570258 ;
Abstract
Residual aqueous phases, emanating from the synthesis of methyl chloride by reacting methanol with hydrochloric acid, are conveniently demethanolized by maintaining same in liquid phase and in the absence of catalyst, at a temperature of from 50.degree. to 150.degree. C. and under a pressure of less than about 8 bars. The methanol recovered is in the form of a crude methyl chloride which is advantageously recycled to the CH.sub.3 OH/HCl reaction zone.