Process for inhibiting the polymerization of vinyl aromatics
First Claim
Patent Images
1. 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 R1 are each hydrogen or an alkyl group having from 1 to 18 carbon atoms.
1 Assignment
0 Petitions
Accused Products
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.
30 Citations
18 Claims
-
1. 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 R1 are each hydrogen or an alkyl group having from 1 to 18 carbon atoms.
- View Dependent Claims (2, 3, 4, 5)
-
6. 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 R1 are each hydrogen or an alkyl group having from 1 to 18 carbon atoms.
- View Dependent Claims (7, 8, 9, 10, 11, 12)
-
13. 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 R1 are each hydrogen or an alkyl group having from 1 to 18 carbon atoms.
- View Dependent Claims (14, 15, 16, 17, 18)
Specification