Polymerization inhibitor for vinyl aromatic compounds

Details Polymerization inhibitor for vinyl aromatic compounds Polymerization inhibitor for vinyl aromatic compounds

1985-07-18

1986-11-18

Bashore, S. Leon

Distillation: processes, separatory

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

For inhibiting or preventing a polymerization reaction

203 49, 203 52, 203 68, 203 91, 585 5, B01D 334

Patent

active

046234306

ABSTRACT:
A process for the distillation of readily polymerizable vinyl aromatic compounds which comprises subjecting said compounds to distillation conditions in the presence of an effective amount of a pretreated polymerization inhibitor selected from the group consisting of asphalts, asphaltenes and any combination thereof. The inhibitor is pretreated by subjecting the inhibitor to a process for substantially increasing the free radical content therein.

REFERENCES:
patent: 2188772 (1940-01-01), Driesbach et al.
patent: 2677617 (1954-05-01), Thompson
patent: 3527822 (1970-09-01), Benson, Jr.
patent: 3531540 (1970-09-01), Marshall et al.
patent: 3647637 (1972-03-01), Rosenwald
patent: 3838019 (1974-09-01), Schwerdtel
patent: 4177110 (1979-12-01), Watson
patent: 4265711 (1981-05-01), Gleim
patent: 4371428 (1983-02-01), Montagna
Hack's Chemical Dictionary, 4th ed., McGraw-Hill Book Co., p. 65, 1972.

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