Separation of azeotropes in poly(vinyl alcohol) process

Details Separation of azeotropes in poly(vinyl alcohol) process Separation of azeotropes in poly(vinyl alcohol) process

1991-09-23

1994-03-08

Schofer, Joseph L.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

526319, 526 67, C08F11606

Patent

active

052928047

ABSTRACT:
In a process for preparing poly(vinyl alcohol), an improved method for separating the methanol/acetate azeotropes that result from said process. The azeotropes are separated by selective adsorption of methanol on an adsorbent followed by regeneration of the adsorbent with hot methanol vapor.

REFERENCES:
patent: 3560461 (1971-02-01), Yonezu et al.
patent: 4549938 (1985-10-01), Berg et al.
patent: 5026482 (1991-06-01), Sircar

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