Title:
METHOD FOR PREPARING BISPHENOL A
Document Type and Number:
WIPO Patent Application WO/2005/030687
Kind Code:
A1
Abstract:
The present invention discloses a method for preparing bisphenol A, which comprising the following steps: sending phenol and acetone to reaction zone with condensation catalysts to give a stream containing bisphenol A; sending this stream to rectification zone to obtain a fraction mainly containing bisphenol A and phenol; and delivering this fraction to crystalization zone to get the product of bisphenol A; which is characterized in that, in addition to the stream containing bisphenol A, a water-depleted fraction, which mainly contains phenol, bisphenol A and acetone, is obtained in the rectification zone and is recycled to the reaction zone after being cooled down. Through the recirculating of the water-depleted fraction, the water content in the reaction zone can be reduced, the activity of catalysts can be maintained and the exotherm of the reaction can be controlled. Accordingly, the conversion of acetone and the selectivity of the reaction will be improved.
Inventors:
HONG DINGYI (CN)
ZHOU JIDONG (CN)
QIN JINLAI (CN)
LI YUELEI (CN)
YAO ZHENWEI (CN)
ZHANG HONGJIANG (CN)
LIU CUIYUN (CN)
FAN WEIHUA (CN)
ZHOU JIDONG (CN)
QIN JINLAI (CN)
LI YUELEI (CN)
YAO ZHENWEI (CN)
ZHANG HONGJIANG (CN)
LIU CUIYUN (CN)
FAN WEIHUA (CN)
Application Number:
PCT/CN2004/001097
Publication Date:
April 07, 2005
Filing Date:
September 24, 2004
Export Citation:
Assignee:
CHINA PETROLEUM & CHEMICAL (CN)
HONG DINGYI (CN)
ZHOU JIDONG (CN)
QIN JINLAI (CN)
LI YUELEI (CN)
YAO ZHENWEI (CN)
ZHANG HONGJIANG (CN)
LIU CUIYUN (CN)
FAN WEIHUA (CN)
HONG DINGYI (CN)
ZHOU JIDONG (CN)
QIN JINLAI (CN)
LI YUELEI (CN)
YAO ZHENWEI (CN)
ZHANG HONGJIANG (CN)
LIU CUIYUN (CN)
FAN WEIHUA (CN)
International Classes:
C07C37/20; C07C37/74; C07C37/84; C07C39/16; (IPC1-7): C07C39/16; C07C37/20
Foreign References:
| CN1118155A | 1996-03-06 | |||
| US5087767A | 1992-02-11 | |||
| CN1390819A | 2003-01-15 | |||
| CN1406218A | 2003-03-26 | |||
| CN1118155A | 1996-03-06 | |||
| CN1077187A | 1993-10-13 | |||
| CN1080914A | 1994-01-19 | |||
| US5087767A | 1992-02-11 | |||
| US3049569A | 1962-08-14 | |||
| CN1390187A | 2003-01-08 | |||
| CN1300729A | 2001-06-27 | |||
| CN118155A |
Other References:
QI XIWANG; CHEN HONGFANG, PETROCHEMICAL INDUSTRY, vol. 25, no. 9, 1996, pages 620 - 624
See also references of EP 1669339A4
See also references of EP 1669339A4
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (Vantone New World Plaza 2 Fuchengmenwai Street, Beijing 7, CN)
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