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US 4,376,678 AGranted
Method of inhibiting polymerization of vinyl aromatic compounds
AssigneeAmerican Hoechst Corporation
InventorRichard D. Partos
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Abstract
Disclosed is a method of distilling readily polymerizable vinyl aromatic compounds such as styrene, .alpha.-methyl styrene, vinyl toluenes and divinylbenzenes wherein 2,2-bis(3,5-dinitro-4-hydroxy-phenyl)propane is used as a polymerization inhibitor. The invention is particularly useful for the distillation of divinylbenzene.
Claims5
A method of distilling a readily polymerizable vinyl aromatic compound, which comprises subjecting said compound to a vacuum distillation condition in a distillation system in the presence of 2,2-bis(3,5-dinitro-4-hydroxy-phenyl) propane.
Dependencies are inferred from the claim text.