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:
Feb. 01, 2005
Filed:
Oct. 24, 2000
Hiroshi Uchida, Oita, JP;
Tomoyoshi Higashi, Oita, JP;
Etsuko Kadowaki, Oita, JP;
Takashige Miyanari, Oita, JP;
Wataru Oguchi, Oita, JP;
Hiroshi Uchida, Oita, JP;
Tomoyoshi Higashi, Oita, JP;
Etsuko Kadowaki, Oita, JP;
Takashige Miyanari, Oita, JP;
Wataru Oguchi, Oita, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
A process for producing an ester comprising reacting a carboxylic acid and ethylene in the presence of an acid catalyst in a vapor phase, wherein the concentration of olefin having 3 or more carbon atoms in the starting materials is controlled to 10,000 ppm or less in terms of the molar ratio to the total of the olefin and ethylene. The deterioration of the catalyst can be remarkably prevented from proceeding and a continuous and stable operation can be performed for a long time.