| 发明名称 |
|
| 摘要 |
<p>Impure bisphenol-A is purified by fractional melt crystallization in a falling film dynamic crystallizer. Surprisingly bisphenol-A is frozen out in its orthorhombic crystalline form. Whereas in normal melt crystallization thermal and catalytic degradation would be a problem, fractional melt crystallization in a falling film dynamic crystallizer causes no serious degradation, because it requires relatively little time. <IMAGE></p> |
| 申请公布号 |
JP2949163(B2) |
申请公布日期 |
1999.09.13 |
| 申请号 |
JP19910254309 |
申请日期 |
1991.09.06 |
| 申请人 |
ZURUTSUAA HIEMUTETSUKU AG |
发明人 |
GEIROODO EMU KITSUSHINJAA;NIKORASU PII UIN |
| 分类号 |
C07C37/84;C07C39/16;(IPC1-7):C07C39/16 |
主分类号 |
C07C37/84 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
