| 发明名称 |
Purification of crude 9,9-bis-(4-hydroxyphenyl)-fluorene |
| 摘要 |
Certain impurities found in 9,9-bis(4-hydroxyphenyl)-fluorene are removed by treatment of the latter with a methanol-water mixture and thereafter isolating the purified fluorene.
|
| 申请公布号 |
US4049721(A) |
申请公布日期 |
1977.09.20 |
| 申请号 |
US19760720744 |
申请日期 |
1976.09.07 |
| 申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
CORN, JR., JOHN E.;KLOPFER, HOWARD J. |
| 分类号 |
C08G64/06;(IPC1-7):C07C37/24 |
主分类号 |
C08G64/06 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
