Invention Grant
US5969167A Method for making tris(hydroxyphenyl) compounds using ion exchange resins
失效
使用离子交换树脂制备三（羟基苯基）化合物的方法
- Patent Title: Method for making tris(hydroxyphenyl) compounds using ion exchange resins
- Patent Title (中): 使用离子交换树脂制备三（羟基苯基）化合物的方法
-
Application No.: US953057Application Date: 1997-10-17
-
Publication No.: US5969167APublication Date: 1999-10-19
- Inventor: Swaminathan Sivaram , Vishnu R. Ranade , Srinivasan Chakrapani , Prakash P. Wadgonkar , Paul D. Sybert , Gaylord M. Kissinger , Ashok K. Mendiratta
- Applicant: Swaminathan Sivaram , Vishnu R. Ranade , Srinivasan Chakrapani , Prakash P. Wadgonkar , Paul D. Sybert , Gaylord M. Kissinger , Ashok K. Mendiratta
- Applicant Address: MA Pittsfield
- Assignee: General Electric Company
- Current Assignee: General Electric Company
- Current Assignee Address: MA Pittsfield
- Main IPC: B01J31/08
- IPC: B01J31/08 ; C07B61/00 ; C07C37/20 ; C07C39/15 ; C09B11/04
Abstract:
An improved method for the preparation of tris(4-hydroxyphenyl) compounds is provided. In particular, an improved method for preparing 1, 1, 1-tris(4'-hydroxyphenyl)ethane is provided which comprises heating a mixture comprising phenol and 4-hydroxy acetophenone in the presence of effective amounts of an ion exchange catalyst and a mercaptan as a copromoter such that the resulting 1, 1, 1-tris(4'-hydroxyphenyl)ethane is substantially free of various reaction impurities.
Public/Granted literature
- US4209387A Contour and width gauge for paneled containers Public/Granted day:1980-06-24
Information query
