发明名称 |
Process for the cleavage of bisphenol A |
摘要 |
<p>A cleavage method of bisphenols capable of yielding a product containing high-purity isopropenylphenol and phenol is disclosed, including (1) a cleavage step of supplying the mixture containing bisphenols together with chroman derivatives and flavan derivatives formed as by-products in the production process of bisphenols to a cleaving vessel and carrying out a cleavage reaction in the presence of a basic or acidic catalyst at a temperature of from 150 to 260 DEG C under a reduced pressure condition of not higher than 300 mmHg, (2) a distillation step of supplying the cleavage step product formed in the cleavage step in a vapor state to a distillation column and distilling at a temperature of from 130 to 200 DEG C under a reduced pressure condition of not higher than 300 mmHg, and (3) a reflux step of condensing the distillate from the distillation step, refluxing a part thereof to the distillation step at a reflux ratio of from 0.01 to 3, and discharging out the residue from the system.</p> |
申请公布号 |
EP1110937(B1) |
申请公布日期 |
2004.09.29 |
申请号 |
EP20000940938 |
申请日期 |
2000.07.04 |
申请人 |
MITSUI CHEMICALS, INC. |
发明人 |
ONO, YUZO;TERADA, KOUICHIROU;MIZUMA, KIYOSHI;SHIBASAKI, MIKIO |
分类号 |
C07B61/00;C07C37/52;C07C37/74;C07C39/04;C07C39/18;C07C39/19;(IPC1-7):C07C37/52 |
主分类号 |
C07B61/00 |
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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