Polymerization inhibitor for vinyltoluene

Details Polymerization inhibitor for vinyltoluene Polymerization inhibitor for vinyltoluene

1981-04-06

1982-07-27

Sever, Frank

Distillation: processes, separatory

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

For inhibiting or preventing a polymerization reaction

203 56, 585808, 585833, 585865, 585952, B01D 334

Patent

active

043416004

ABSTRACT:
A process for distilling vinyltoluene comprising subjecting vinyltoluene to distillation conditions in the presence of a synergistic polymerization inhibiting mixture of N-nitrosodiphenylamine (NDPA) and dinitro-para-cresol (DNPC). Preferably from about 100 to about 300 ppm by weight NDPA and about 300 to about 700 ppm by weight DNPC are dissolved in the crude vinyltoluene and the resulting solution is vacuum distilled.

REFERENCES:
patent: 3988212 (1976-10-01), Watson
patent: 4182658 (1980-01-01), Watson

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