Process for the preparation of aromatic polyesters and apparatus

Details Process for the preparation of aromatic polyesters and apparatus Process for the preparation of aromatic polyesters and apparatus

1983-06-28

1989-10-10

Richman, Barry S.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Organic polymerization

422225, 422234, 526 66, 528179, 528193, 528194, B01F 722, B01J 1918, C08F 200

Patent

active

048730602

ABSTRACT:
In a process for the preparation of aromatic polyesters by polycondensation of diphenols with chlorides of aromatic dicarboxylic acids by the two-phase interfacial polycondensation process, in which a dispersion as the reaction mixture is prepared from an aqueous phase, which contains the diphenolate formed with the aid of alkali metal hydroxide, and an organic-liquid phase containing the acid chlorides, this dispersion is passed, in the apparatus which is intended for carrying out the process and which comprises a reaction kettle and a dispersing device included with the latter in a circulation, through the dispersing device and the reaction kettle, the acid chloride dissolved in a largely anhydrous chlorinated solvent being continuously fed into this circulation at a point which, in the direction of flow, is upstream of the dispersing device.

REFERENCES:
patent: 2880076 (1959-03-01), Kircher et al.
patent: 3010804 (1961-11-01), Wistrich et al.
patent: 3013866 (1961-12-01), Samaniego et al.
patent: 3307792 (1967-03-01), Hughes et al.
patent: 4157427 (1979-06-01), Ferber

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