Title:
ビスフェノールAの精製方法
Document Type and Number:
Japanese Patent JP2006516025
Kind Code:
A
Abstract:
Bisphenol-A is purified in a process which comprises the following steps: a) cooling a liquid mixture comprising bisphenol-A and water in a bisphenol-A crystallizer to form bisphenol-A crystals in a liquid phase; b) separating the bisphenol-A crystals from the liquid phase; c) dividing at least a portion of the liquid phase into a bisphenol-rich organic phase and a water-rich phase; d) feeding phenol and at least a portion of the bisphenol-rich organic phase into a adduct crystallizer to form a crystalline adduct of phenol and bisphenol-A in a mother liquor, and e) separating the crystalline adduct from the mother liquor. Bisphenol-A of high purity at a high yield is obtained.
Inventors:
Young, Thomas C.
Ford, Damien M.
Frey, Johann-Bilhelm
Ford, Damien M.
Frey, Johann-Bilhelm
Application Number:
JP2004555411A
Publication Date:
June 15, 2006
Filing Date:
November 12, 2003
Export Citation:
Assignee:
Dow Global Technologies Incorporated
International Classes:
C07C37/84; C07C39/16
Domestic Patent References:
| JPS59122435A | 1984-07-14 | |||
| JPH0840962A | 1996-02-13 | |||
| JPH06321834A | 1994-11-22 | |||
| JPH04283531A | 1992-10-08 | |||
| JPH01135736A | 1989-05-29 |
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Masaya Nishiyama
Takashi Ishida
Tetsuji Koga
Masaya Nishiyama