发明授权
- 专利标题： VERFAHREN ZUR KONTINUIERLICHEN HERSTELLUNG VON POLYESTERN ODER COPOLYESTERN
- 专利标题（英）： Method for continuos production of polyesters or copolyesters
- 专利标题（中）： PROCESS聚酯或共连续生产
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申请号： EP01271410.1申请日： 2001-11-27
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公开(公告)号： EP1345980B1公开(公告)日： 2005-05-25
- 发明人: REISEN, Michael , WILHELM, Fritz
- 申请人： Zimmer AG
- 申请人地址： Borsigallee 1 60388 Frankfurt DE
- 专利权人： Zimmer AG
- 当前专利权人： Zimmer AG
- 当前专利权人地址： Borsigallee 1 60388 Frankfurt DE
- 代理机构： Meyer-Dulheuer, Karl-Hermann, Dr.
- 优先权： DE10064361 20001221; DE10127147 20010602
- 国际公布： WO2002050159 20020627
- 主分类号： C08G63/78
- IPC分类号： C08G63/78 ; C07C67/02 ; C07C67/03 ; B01D3/00
摘要：
The invention relates to a method for the production of polyesters or copolyesters, wherein continuos esterification of dicarboxylic acid esters and diols or continuos interesterification of dicarboxylic acid esters with diols is carried out in n reaction pressure levels connected one after the other, wherein the pressure in the first reaction pressure level, which is higher relative to the other reaction pressure levels, drops successively from one reaction pressure level to the other, the vapor flows of the individual reaction pressure levels are jointly rectified in a rectifying column and the diol components falling to the bottom of the rectifying column are fed back again at least to the first reaction level. In order to reduce the degree of complication of said process, at least the last reaction pressure level has a negative pressure, the pressure in the rectifying column is higher than the pressure in the last reaction pressure level and the vapors coming out of the last reaction pressure level are compressed to the pressure prevailing in the rectifying column.
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