Title:
METHOD FOR PRODUCING AROMATIC OLIGOMER
Document Type and Number:
Japanese Patent JP2003048856
Kind Code:
A
Abstract:
To enable reuse of acid catalysts used for a condensation reaction and reduce acidic waste water treatment used for the condensation reaction.
This method for producing a polycyclic aromatic oligomer comprises reacting a bicyclic or tricyclic aromatic compound or the aromatic compound and phenols with formaldehydes in the presence of an acid catalyst while removing water produced by the condensation reaction to the outside of the reaction system, separating an aqueous solution layer containing the acid catalyst from an organic layer and reusing the aqueous solution layer as the acid catalyst.
Inventors:
SENZAKI TOSHIHIDE
IMAMURA TAKAHIRO
HORIBE KAZUYOSHI
YOSHIDA TOMOAKI
IMAMURA TAKAHIRO
HORIBE KAZUYOSHI
YOSHIDA TOMOAKI
Application Number:
JP2001235167A
Publication Date:
February 21, 2003
Filing Date:
August 02, 2001
Export Citation:
Assignee:
NIPPON STEEL CHEMICAL CO
International Classes:
C07C29/38; C07B61/00; C07C33/26; C07C37/20; C07C39/15; (IPC1-7): C07C29/38; C07C33/26; C07C37/20; C07C39/15
Domestic Patent References:
| JPS5780404A | 1982-05-20 | |||
| JP2000344848A | 2000-12-12 |
Foreign References:
| WO2001016199A1 | 2001-03-08 | |||
| US4395498A | 1983-07-26 |
Attorney, Agent or Firm:
Katsuo Naruse (2 outside)
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