Process for continuously hydrolyzing ethylene-vinyl acetate

Details Process for continuously hydrolyzing ethylene-vinyl acetate Process for continuously hydrolyzing ethylene-vinyl acetate

1984-12-24

1986-09-09

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...

525 60, 5253303, 5253306, 525366, C08F 800

Patent

active

046110291

ABSTRACT:
A process for continuously hydrolyzing ethylene-vinyl acetate copolymer which comprises feeding a methanol solution in which an ethylene-vinyl acetate copolymer having ethylene of 25 to 50 % by mole into the upper portion of a tower reactor and supplying an alkaline catalyst into the middle portion of the tower, and blowing a methanol vapor into the lower portion of the tower to remove a methyl acetate vapor together with a methanol vapor from the top of the tower and taking out the highly hydrolyzed ethylene-vinyl acetate copolymer from the bottom of the tower, and whereby a highly hydrolyzed ethylene-vinyl acetate copolymer is easily obtained in the presence of a small amount of alkaline catalyst.

REFERENCES:
patent: 3560461 (1971-02-01), Yonezu et al.

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