Process for continuous production of ethylene-vinyl acetate copo

Details Process for continuous production of ethylene-vinyl acetate copo Process for continuous production of ethylene-vinyl acetate copo

1986-01-06

1987-04-14

Schofer, Joseph L.

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

Synthetic resins

Removing and recycling removed material from an ongoing...

526 67, 526 87, 5262196, 526227, 526331, 422138, C08F 206, C08F21808

Patent

active

046579940

ABSTRACT:
An improved process for continuously producing ethylene-vinyl acetate copolymer containing 20 to 50 mole % of ethylene is provided. An aliphatic alcohol solvent is employed in the polymerization vessel. Ethylene vapor discharged from the polymerization vessel is introduced into the tubes of the lower part of a multi-tubular heat exchanger. Vinyl acetate is introduced into the upper part of the heat exchanger and caused to flow through said tubes, thereby effecting absorption and solubilization of ethylene into the vinyl acetate. The solubilized ethylene and vinyl acetate is passed to the polymerization vessel. The process of this invention permits the stable production of the copolymer over a long period of time.

REFERENCES:
patent: 3891603 (1975-06-01), Heil et al.
patent: 4024329 (1977-05-01), Lauer et al.
patent: 4091200 (1978-05-01), Vandegaer
patent: 4282339 (1981-08-01), Donaldson et al.
patent: 4408024 (1983-10-01), Matsuyama et al.
patent: 4442271 (1984-04-01), Rau et al.
patent: 4485225 (1984-11-01), Satoh et al.

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