Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2007-04-03
2007-04-03
Dentz, Bernard (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
active
10558742
ABSTRACT:
A process for producing an alkylene carbonate, which comprises reacting an alkylene oxide with carbon dioxide in the presence of a catalyst in a reactor to obtain a reaction mixture containing an alkylene carbonate, the reactor communicating with a process-side channel of a heat exchanger through a piping to form a circulation circuit, wherein the process is characterized in that it further comprises, during or after the reaction, flowing a process liquid through the circulation circuit including the reactor and the process-side channel of the heat exchanger while flowing a heat exchange medium having a temperature of from 140° C. to 200° C. through the heat exchange-side channel of the heat exchanger, thereby maintaining the inner temperature of the process-side channel at 135° C. to 200° C.
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International Search Report mailed Sep. 21, 2004.
Okamoto Hiroshige
Someya Ken
Asahi Kasei Chemicals Corporation
Dentz Bernard
Staas & Halsey , LLP
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