Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Reexamination Certificate
2005-02-01
2005-02-01
Richter, Johann (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
Reexamination Certificate
active
06849759
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.
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Higashi Tomoyoshi
Kadowaki Etsuko
Miyanari Takashige
Oguchi Wataru
Uchida Hiroshi
Richter Johann
Showa Denko K.K.
Sughrue & Mion, PLLC
Zucker Paul A.
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