Title:
REMOVAL OF ALKALI HALOGENIDE FROM REACTANTS OF XYLYLENE DICHLORIDE AND/OR -BROMIDE AND BISPHENOL REACTION
Document Type and Number:
Japanese Patent JPS58187428
Kind Code:
A
Abstract:
In a method for the removal of alkali halides by washing them out of reaction products prepared, in the presence of ketones which form a miscibility gap with water, by a reaction of xylylene dichlorides and/or bromides with bisphenols in the presence of alkaline compounds or in the form of alkali salts, at 85 DEG to 160 DEG C., with the addition in some cases of terminal-group-closing monophenols or monohalogen alkyl compounds, water or a water-ketone mixture solvent is added to the reaction mixture before beginning the filtration, and afterward is recycled. For the complete recovery of the ketones and alkali halides and the reuse of the ketones with reduced energy consumption a kentonous phase and an aqueous phase are recovered by separate evaporation after the separation of the filtrate in two liquid phases, both of the condensates are combined to a ketone-water mixture, the filter cake is stirred up again in the ketone-water mixture and filtered a second time.
Inventors:
DEIRUKU GURENBIN
KURUTO FUUN
GIYUNTAA MAIYAA
MANFUREETO TARUMAIYAA
KURUTO FUUN
GIYUNTAA MAIYAA
MANFUREETO TARUMAIYAA
Application Number:
JP6578183A
Publication Date:
November 01, 1983
Filing Date:
April 15, 1983
Export Citation:
Assignee:
DYNAMIT NOBEL AG
International Classes:
C08G65/40; C08G65/00; C08G65/46; (IPC1-7): C08G65/46
Domestic Patent References:
| JPS5137199A | 1976-03-29 |
Foreign References:
| DE2929914A1 | 1981-02-19 |
Attorney, Agent or Firm:
Toshio Yano