Process for producing carbonic ester

Details Process for producing carbonic ester Process for producing carbonic ester

2003-08-06

2008-11-04

Shiao, Rei-Tsang (Department: 1626)

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

Organic compounds

Carbonate esters

C558S270000

Reexamination Certificate

active

07446218

ABSTRACT:
A method for producing a carbonic ester, comprising: (1) performing a reaction between an organometal compound mixture and carbon dioxide, the organometal compound mixture comprising a reactive organometal compound and an unregenerable unreactive compound derived from the reactive organometal compound, to thereby obtain a reaction mixture containing a carbonic ester, the unregenerable unreactive compound, and a regenerable metamorphic organometal compound derived from the reactive organometal compound, (2) separating the reaction mixture into a first portion containing the carbonic ester and the unregenerable unreactive compound, and a second portion containing the regenerable metamorphic organometal compound, and (3) reacting the second portion of the reaction mixture with an alcohol to form an organometal compound mixture and water and removing the water from the organometal compound mixture, the organometal compound mixture comprising a reactive organometal compound and an unregenerable unreactive compound derived from the reactive organometal compound.

REFERENCES:
patent: 5543546 (1996-08-01), Tsuneki et al.
patent: 2005/0080274 (2005-04-01), Miyake et al.
patent: 2001-247519 (2001-09-01), None
Itakura et al., 1999, CAS: 130:168016.
Ko et al., 1995, CAS: 122:290332.
Yamazaki et al., CAS: 90:168087.

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