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. 09, 1982
Filed:
Oct. 01, 1980
Applicant:
Inventor:
Nicolas Hardy, Jemeppe-sur-Sambre, BE;
Assignee:
Propylox (Societe Anonyme), Brussels, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
562606 ; 203 60 ; 203 61 ; 203 63 ; 203 67 ; 260415 ; 260419 ; 562607 ; 562608 ; 562609 ;
Abstract
A process for the recovery of carboxylic acids from mixtures containing glycol esters derived from these acids. The process comprises reacting these mixtures at boiling with water to form carboxylic acid and entraining the carboxylic acid formed by means of the water by azeotropic distillation, so as to separate off a mixture of carboxylic acid and water. This mixture is subjected to extractive distillation by means of an organic solvent which is insoluble in water and in which water is insoluble. A mixture of water and organic solvent is thereby separated from a solution of carboxylic acid in the organic solvent.