发明名称 |
PROCESS FOR CONTINUOUS PRODUCTION OF DIALKYL CARBONATE AND DIOL |
摘要 |
A method for continuously producing a (A) dialkyl carbonate and a (B) diol, comprising continuously feeding a cyclic carbonate and an aliphatic monohydric alcohol to a continuous multi-stage distillation column to thereby effect a transesterification therebetween, thereby continuously producing a dialkyl carbonate and a diol, while continuously withdrawing a low boiling point mixture containing the produced dialkyl carbonate (A) in a gaseous form from an upper portion of the distillation column and continuously withdrawing a high boiling point mixture containing the produced diol (B) in a liquid form from a lower portion of the distillation column, wherein the transesterification is performed under conditions wherein: (a) the reaction pressure of the column bottom is 5 x 10<4> Pa or less; (b) the reaction temperature of the column bottom is in the range of from -20 DEG C to less than 60 DEG C; and (c) the distillation column has an F-factor in the range of from 0.2 to 5.0, the F-factor being represented by the following formula (1): <MATH> wherein ug represents the gas velocity (m/s) in the distillation column and rho g represents the gas density (kg/m<3>) in the distillation column. <IMAGE> |
申请公布号 |
EP1086940(A4) |
申请公布日期 |
2004.04.07 |
申请号 |
EP19990923989 |
申请日期 |
1999.06.10 |
申请人 |
ASAHI KASEI KABUSHIKI KAISHA |
发明人 |
TOJO, MASAHIRO;OONISHI, KAZUHIRO |
分类号 |
C07C27/02;C07C29/128;C07C68/06 |
主分类号 |
C07C27/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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