Method for inhibiting the formation of polymerized vinylaromatic

Details Method for inhibiting the formation of polymerized vinylaromatic Method for inhibiting the formation of polymerized vinylaromatic

1981-04-20

1983-08-02

Sever, Frank

Distillation: processes, separatory

Addition of material to distilland to inhibit or prevent...

For inhibiting or preventing a polymerization reaction

202267R, B01D 334

Patent

active

043964621

ABSTRACT:
A method for inhibiting the formation of undesired polymer accumulations during distillative purification of vinylaromatic monomers such as styrene, alpha-alkylstyrene, vinyltoluene, divinylbenzene or the like comprising distilling the vinylaromatic monomer in the presence of a cupreous material such as metallic copper or a copper alloy, and apparatus for carrying out the method in which at least a portion of the interior of a distillation column used to purify vinylaromatic monomer, particularly in areas where there is little vapor movement, is provided with a surface layer or coating of cupreous material.

REFERENCES:
patent: 4033829 (1977-07-01), Higgins et al.
patent: 4105506 (1978-08-01), Watson
Boundy and Boyer, Styrene, p. 201.

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