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Title:
REUSE OF CONCENTRATED SOLUTION FORMED IN PHENOLIC RESIN PRODUCTION
Document Type and Number:
Japanese Patent JPS63305116
Kind Code:
A
Abstract:

PURPOSE: To make it possible to reuse a formaldehyde component and a phenolic component present in a concentrated solution formed in a concentration step in the production of a phenolic resin easily without providing any complicated step, by fractionating and recovering the solution according to the temperatures in the reaction kettle.

CONSTITUTION: A concentrated solution formed in a step of producing a phenolic resin is recovered by the following process for reuse. A concentrated solution on the low-temperature side of the reaction kettle and one on the high- temperature side are separated from each other and recovered. The low- temperature side concentrated solution is cooled, and separated precipitates are recycled as a source of formaldehyde, and the high-temperature side solution is recycled as a source of phenol.


Inventors:
KATO MASAHARU
Application Number:
JP1987000141955
Publication Date:
December 13, 1988
Filing Date:
June 05, 1987
Export Citation:
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Assignee:
AISIN CHEM
International Classes:
C07C37/70; C07C27/00; C07C39/04; C07C45/00; C07C47/04; C07C67/00; C08G8/00; C08G8/04; (IPC1-7): C07C37/70; C07C39/04; C07C47/04; C08G8/04