Title:
PROCESS FOR THE PREPARATION OF AROMATIC CARBONATE
Document Type and Number:
WIPO Patent Application WO/1997/011049
Kind Code:
A1
Abstract:
A process for the preparation of an aromatic carbonate by subjecting a starting compound selected from the group consisting of dialkyl carbonates, alkyl aryl carbonates and mixtures thereof and a reactant selected from the group consisting of aromatic mono-hydroxyl compounds, alkyl aryl carbonates and mixtures thereof to transesterification in the presence of a metal-containing catalyst, characterized in that the transesterification is conducted while keeping the weight ratio (WR) of at least one substance having an aromatic group selected from the group consisting of specific aromatic polyhydroxyl compounds resulting from the starting compound, the reactant and/or by-products of the transesterification and residues of them to the metal constituting the catalyst-containing liquid mixture of the transesterification system. According to this process, undesirable phenomena such as the deposition of the catalyst in reactors or pipes and the adhesion of the catalyst to them can be inhibited to thereby permit a stable preparation of an aromatic carbonate for a long period.
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Inventors:
KOMIYA KYOSUKE (JP)
TOJO MASAHIRO (JP)
FUKUOKA SHINSUKE (JP)
TOJO MASAHIRO (JP)
FUKUOKA SHINSUKE (JP)
Application Number:
PCT/JP1996/002734
Publication Date:
March 27, 1997
Filing Date:
September 20, 1996
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
KOMIYA KYOSUKE (JP)
TOJO MASAHIRO (JP)
FUKUOKA SHINSUKE (JP)
KOMIYA KYOSUKE (JP)
TOJO MASAHIRO (JP)
FUKUOKA SHINSUKE (JP)
International Classes:
C07C68/06; (IPC1-7): C07C69/96; C07C68/06
Foreign References:
| JPH049358A | 1992-01-14 | |||
| JPH04224547A | 1992-08-13 | |||
| JPH04230242A | 1992-08-19 | |||
| JPH04235951A | 1992-08-25 | |||
| JPH06116210A | 1994-04-26 | |||
| JPH07227546A | 1995-08-29 |
Other References:
See also references of EP 0855384A4
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