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:
May. 15, 2001
Filed:
Apr. 26, 1999
Malcolm J. Cunnington, East Yorkshire, GB;
Mohammed Hussain Khan, Hants, GB;
Witold Franciszek Pacynko, East Yorkshire, GB;
BP Chemicals Limited, London, GB;
Abstract
This invention is a process for the removal of acetaldehyde impurities from ethyl acetate formed by reacting acetic acid with ethylene over a catalyst by refining a crude mixture of ethyl acetate, diethyl ether, acetaldehye and water in a column (C) so as to remove (a) refined ethyl acetate as a base product to be further purified, and (b) light ends mixture comprising diethyl ether and acetaldehyde overhead to be fed to an aldehyde removal column; a purge comprising acetaldehyde is removed at or near the top of the aldehyde removal column. The process is a very important step in the commercial manufacture of ethyl acetate because the presence of acetaldehyde is detrimental to the esterification catalyst.