Emergency polymerization inhibitor system for vinyl aromatic com

Details Emergency polymerization inhibitor system for vinyl aromatic com Emergency polymerization inhibitor system for vinyl aromatic com

1977-11-23

1980-01-08

Bernstein, Hiram H.

Distillation: processes, separatory

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

For inhibiting or preventing a polymerization reaction

203DIG7, 203 69, 585 5, 585952, 585956, B01D 334

Patent

active

041826582

ABSTRACT:
Disclosed is a method for preventing the polymerization of a readily polymerizable vinyl aromatic compound during distillation at elevated temperatures within a distillation apparatus which is subject to an emergency condition, such as a power outage. This method comprises force feeding a supplemental polymerization inhibitor having a high solubility in the vinyl aromatic compound, and a long duration of efficiency, into each of the distillation vessels of a conventional distillation apparatus in an amount sufficient to prevent polymerization therein. In the preferred embodiment the supplemental polymerization inhibitor comprises 2,6-dinitro-p-cresol and meta-nitro-para-cresol.

REFERENCES:
patent: 2240764 (1941-05-01), Dreisbach et al.
patent: 3366702 (1968-01-01), Moriarty
patent: 3988212 (1976-10-01), Watson
patent: 4033829 (1977-07-01), Higgins et al.

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