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:
Nov. 16, 1993
Filed:
Jun. 12, 1992
Applicant:
Inventors:
Assignee:
The British Petroleum Company p.l.c., London, GB;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C07C / ;
U.S. Cl.
CPC ...
203 53 ; 203 61 ; 203 93 ; 203 94 ; 203 96 ; 203 97 ; 203 98 ; 203 99 ; 203D / ; 203D / ; 560248 ; 568411 ; 570262 ; 570263 ;
Abstract
A process for removing acetone from an acetone/methyl acetate/methyl iodide mixture utilizing extractive distillation with water being introduced to the distillation zone above the point of introduction of the mixture and acetic acid being introduced at or above the point of introduction of the mixture. In a preferred embodiment the mixture is subjected to an initial extraction with an aqueous extractant to remove most of the methyl iodide. The process is particularly applicable to removing acetone by-product in carbonylation processes for the production of acetic anhydride.