Organic compounds -- part of the class 532-570 series – Organic compounds – Carbonate esters
Reexamination Certificate
2003-02-03
2008-08-26
Shiao, Rei-Tsang (Department: 1626)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbonate esters
C558S274000
Reexamination Certificate
active
07417161
ABSTRACT:
The present invention relates to a continuous method for the preparation of an aromatic carbonate by reacting a dialkyl carbonate and an aromatic hydroxy compound in the presence of a heterogeneous catalyst, and a reaction apparatus for the same. The continuous method comprises the step of reacting dialkyl carbonate and an aromatic hydroxy compound in the presence of the heterogeneous catalyst in a loop-type, catalyst-containing reaction apparatus, wherein a reactor equipped with a filter in which the catalyst is contained is connected with a heat exchanger portion for providing necessary heat during the reaction, reaction solution is circulated between the catalyst-containing portion and heat exchanger via a circulation pump, and by-products can be eliminated via a distillation column connected with the reactor.
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PCT International Search Report; International application No. PCT/KR03/00237; International filing date: Feb. 3, 2003; Date of Mailing: Apr. 18, 2003.
PCT International Preliminary Examination Report; International application No. PCT/KR2003/000237; International filing date: Feb. 3, 2003; Date of Completion: Jun. 2, 2004.
Hong Mi-Jeung
Hong Moo-Ho
Kwak Ja-Hun
Woo Boo-Gon
Lerner David Littenberg Krumholz & Mentlik LLP
LG Chem. Ltd.
Shiao Rei-Tsang
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