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:
Apr. 26, 1988
Filed:
Mar. 31, 1987
Applicant:
Inventors:
Ernesto Vera-Castaneda, Webster, TX (US);
Diane A Montevideo, Given, WV (US);
David J Miller, Charleston, WV (US);
John E Logsdon, Houston, TX (US);
David R Bryant, South Charleston, WV (US);
Assignee:
Davy McKee (London) Limited, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C07C / ;
U.S. Cl.
CPC ...
203 74 ; 203 77 ; 203 81 ; 203 89 ; 203D / ; 549326 ; 560190 ; 560191 ; 560204 ; 568864 ;
Abstract
A method of producing substantially pure dialkyl maleate by separating monoalkyl maleate from dialkyl maleate in a short residence time distillation zone while minimizing reversion of the monoalkyl maleate to alkanol and maleic anhydride and without having to neutralize the monoalkyl maleate.