Method for inhibiting the deposition of ethylene-vinyl alcohol c

Details Method for inhibiting the deposition of ethylene-vinyl alcohol c Method for inhibiting the deposition of ethylene-vinyl alcohol c

1992-11-30

1994-02-22

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568840, C07C 2994, C07C 2726

Patent

active

052889254

ABSTRACT:
A method for preventing the precipitation of ethylene-vinyl alcohol copolymers in a distillation vessel. The vessel contains water, methanol, and ethylene-vinyl alcohol copolymers. The method includes the step of adding to the distillation vessel from 1 to about 1,000 ppm of at least one surfactant selected from the group consisting of alkyl, aryl, alkylaryl and arylalkyl sulfonic acids having a carbon length of from 4 to about 30 carbons. Preferably, the surfactant is dodecylbenzenesulfonic acid.

REFERENCES:
patent: 3770798 (1973-11-01), Norton
patent: 3853810 (1974-12-01), Plank
patent: 4309525 (1982-01-01), Nakabayashi et al.
patent: 4710275 (1987-12-01), Berg et al.
patent: 5110997 (1992-05-01), Dickakian

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