Process for inhibiting the polymerization of vinyl aromatics
AssigneeUop LLC
InventorsRobert R. Frame, Paul R. Kurek
Life of this patent
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Abstract
Applicants have developed a process for inhibiting the polymerization of vinyl aromatic compound during the distillation of the vinyl aromatic compounds. The process involves adding to the vinyl aromatic compound, e.g., styrene, a nitroso compound such as N-nitroso-N, N'-di-3-pentyl-p-phenylenediamine.
Claims18
A process for inhibiting the polymerization of a vinyl aromatic compound during distillation of the vinyl aromatic compound comprising adding to the compound an effective amount of the reaction product of nitrous acid and an amine having the formula:
- ##STR10## where R and R.sub.1 are each hydrogen or an alkyl group having from 1 to 18 carbon atoms.
A process for inhibiting the polymerization of a vinyl aromatic compound during the distillation of the vinyl aromatic compound comprising adding to the compound an effective amount of a nitroso compound selected from the group consisting of:
- ##STR12## and mixtures thereof and R and R.sub.1 are each hydrogen or an alkyl group having from 1 to 18 carbon atoms.
A process for inhibiting the polymerization of a vinyl aromatic compound during the distillation of the vinyl aromatic compound comprising adding to the compound an effective amount of a mixture of inhibitor compounds having structures I, II and IV:
- ##STR16## where R and R.sub.1 are each hydrogen or an alkyl group having from 1 to 18 carbon atoms.
Dependencies are inferred from the claim text.