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:
Jul. 03, 1984
Filed:
Apr. 01, 1982
Harley F Hardman, Lyndhurst, OH (US);
John G Frye, Jr, Euclid, OH (US);
Terry J Mazanec, Solon, OH (US);
The Standard Oil Company (Sohio), Cleveland, OH (US);
Abstract
A continuous process for the production of alkyl esters from carboxylic acids wherein an aqueous stream containing a first carboxylic acid, RCO.sub.2 H, is contacted with an organic stream comprising a carboxylic acid ester, R'CO.sub.2 R', so that the organic stream is enriched with RCO.sub.2 H. The RCO.sub.2 H enriched organic stream is separated from the aqueous stream and is contacted with a catalyst to obtain a second carboxylic acid, R'CO.sub.2 H, and a product carboxylic acid ester, RCO.sub.2 R'. The product ester, RCO.sub.2 R', is separated from the second acid, R'CO.sub.2 H, the reactant ester, R'CO.sub.2 R', and the first acid, RCO.sub.2 H, and the second acid, R'CO.sub.2 H, is esterified to obtain the reactant ester, R'CO.sub.2 R', which is recycled to the initial part of the process. In this process R is aliphatic or aromatic, R' is alkyl and R' is aliphatic with at least about 4 carbon atoms. When the reactant ester is a bifunctional polymer having both sulfonic acid and R' carboxylic acid ester pendant functional groups, this process may be performed in the absence of a catalyst.