Process for the preparation of propylene carbonate

Details Process for the preparation of propylene carbonate Process for the preparation of propylene carbonate

2004-06-29

2010-06-01

Wilson, James O (Department: 1624)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbonate esters

Reexamination Certificate

active

07728164

ABSTRACT:
The invention relates to a process for the preparation of propylene carbonate, which process involves contacting propylene oxide with carbon dioxide at a temperature of from 150° C. to 250° C. in the presence of a recycled tetraalkylphosphonium bromide catalyst.

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International Search Report dated Oct. 20, 2004 (PCT/EP2004/051270).
International Preliminary Examination Report dated Oct. 14, 2005 (PCT/EP2004/051270).

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