Continuous countercurrent extraction process for removing water-

Details Continuous countercurrent extraction process for removing water- Continuous countercurrent extraction process for removing water-

1980-11-19

1982-11-23

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

528191, 528491, C08G 6370, C08G 6374

Patent

active

043606628

ABSTRACT:
There is disclosed a continuous countercurrent extraction process for removing tertiary amine hydrochloride impurities which are soluble in water from a water immiscible polymer solution of a halogenated aromatic polyester which has a viscosity of at least about 10 poise and a density greater than about 1.0 gm/cc. This process comprises (a) introducing the polymer solution at the top of an extraction column and introducing water at the bottom of the column to form a two phase mixture, and (b) mechanically agitating the mixture in a particularly defined manner in order to extract the water-soluble impurities from the polymer solution and economically recover the tertiary amine hydrochloride.

REFERENCES:
patent: 3234167 (1966-02-01), Sweeny
patent: 3783147 (1974-01-01), Calicchia et al.
patent: 3883467 (1975-05-01), Stackman et al.
patent: 3905946 (1975-09-01), Nieswandt et al.
patent: 4051113 (1977-09-01), Kissel et al.

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