Process inhibitor for readily polymerizable ethylenically unsatu

Details Process inhibitor for readily polymerizable ethylenically unsatu Process inhibitor for readily polymerizable ethylenically unsatu

1982-06-21

1983-06-21

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

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

For inhibiting or preventing a polymerization reaction

203 61, 203 65, 585 5, 585800, 585860, C07C 720, B01D 334

Patent

active

043892850

ABSTRACT:
The present invention provides an improvement in methods for preparing and processing ethylenically unsaturated aromatic monomer. The improvement comprises employing 3,5-dinitrosalicylic acid as a process inhibitor. The DNSA is present in a concentration of about 50 to 3000 ppm, preferably about 250 to 2000 ppm, and most preferably about 500 to 1000 ppm.

REFERENCES:
patent: 2826581 (1958-03-01), Mahan et al.
patent: 3407240 (1968-10-01), Sakashita et al.
patent: 3551507 (1970-12-01), Sakuragi et al.
patent: 3988212 (1976-10-01), Watson
patent: 4105506 (1978-08-01), Watson
patent: 4272344 (1981-06-01), Watson

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