Title:
METHOD FOR PREPARING ACIDIC CATION EXCHANGE RESIN FIXED BED FOR PRODUCING BISPHENOLS
Document Type and Number:
WIPO Patent Application WO/2001/074489
Kind Code:
A1
Abstract:
A method for preparing an acidic cation exchange resin fixed bed for producing bisphenols, wherein an acidic cation exchange resin is partially neutralized homogeneously with a nitrogen-containing sulfur compound, characterized in that it comprises charging an acidic cation exchange resin into a reactor to form a fixed bed, charging an aqueous solution of an alkylsulfonic acid and an aqueous solution of the nitrogen-containing sulfur compound prior to the start of the reaction, and circulating the resulting solution. The method is free from the problem of the corrosion of equipment after the acidic cation exchange resin is partially neutralized homogeneously with a nitrogen-containing sulfur compound, and is advantageous in that an acid component can be removed with ease in the operation of washing with water and replacement with phenol.
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Inventors:
SARUWATARI TETSUYA (JP)
IWAHARA MASAHIRO (JP)
IWAHARA MASAHIRO (JP)
Application Number:
PCT/JP2001/002651
Publication Date:
October 11, 2001
Filing Date:
March 29, 2001
Export Citation:
Assignee:
IDEMITSU PETROCHEMICAL CO (JP)
SARUWATARI TETSUYA (JP)
IWAHARA MASAHIRO (JP)
SARUWATARI TETSUYA (JP)
IWAHARA MASAHIRO (JP)
International Classes:
B01J31/10; B01J39/04; B01J39/18; B01J49/00; C07B61/00; C07C37/20; C07C39/16; (IPC1-7): B01J49/00; C07C37/20; C07C39/16
Foreign References:
| JPH0840961A | 1996-02-13 | |||
| GB1539463A | 1979-01-31 | |||
| JPH06304479A | 1994-11-01 | |||
| JPH06296871A | 1994-10-25 |
Attorney, Agent or Firm:
Ohtani, Tamotsu (Toranomon 3-chome Minato-ku, Tokyo, JP)
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