发明名称 |
PROCESS FOR CONTINUOUS PURIFICATION OF BISPHENOLS |
摘要 |
The invention relates to a process for the continuous purification of crude bisphenol which comprises (1) forming a single liquid phase comprising a hot mixture of crude bisphenol and water in a ratio substantially of from 75% to 85% weight of crude bisphenol to 15% to 25% weight water; (2) continuously feeding this mixture together with a stream of warm water to a first crystallization zone at a temperature sufficient to maintain a bisphenol-rich liquid phase, a water-rich phase and a crystalline phase comprising 70% to 95% of the total bisphenol in the mixture; (3) passing the three-phase mixture of bisphenol and water to a second crystallization zone operated at 85 .degree.C to 97 .degree.C until 90% t o 99% of the total bisphenol is crystallized; and (4) recovering the purified bisphenol crystals.
|
申请公布号 |
CA2005470(C) |
申请公布日期 |
1999.04.27 |
申请号 |
CA19892005470 |
申请日期 |
1989.12.14 |
申请人 |
|
发明人 |
DONG, WALTER;VAN SHAW, PAUL;BUECHELE, JAMES L. |
分类号 |
C07C37/84;C07C39/16;(IPC1-7):C07C37/84 |
主分类号 |
C07C37/84 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|