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US 10,869,444 B2Granted
Compositions of oxygenated amines and quinone methides as antifoulants for vinylic monomers
AssigneeEcolab USA Inc.
InventorsJonathan Masere, Lisheng Xu, Anahita Khanlari
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Abstract
Described are compositions and methods for inhibiting polymerization of a monomer (e.g., styrene) composition a quinone methide polymerization retarder and an oxygen-containing amine compound that is a tertiary amine or hydroxylamine. In a mixture, the oxygen-containing amine compound improves the efficacy of the quinone methide polymerization retarder and provides greater antipolymerant activity. In turn, the mixture reduces or prevents apparatus fouling and improves the purity of monomer streams.
Claims22
A composition for inhibiting monomer polymerization comprising:
- a quinone methide;
- and
- an oxygen-containing amine compound of Formula I:
- where R1, R2 and R3 are independently selected from a) a carbon- and oxygen-containing group having 1-18 carbon atoms and that includes i) an ether group, ii) an ester group, or iii) wherein a) is of Formula IIa:
- —CH2—(R9)(OH), wherein R9 is a 6-17 carbon group comprising an aryl or alkylaryl group, and the hydroxyl group is bonded to any carbon in R9, b) a carbon-containing group having 1-18 carbon atoms, and c) OH, with the proviso that at least one of R1, R2, and R3 is a).
2 more elements
Dependencies are inferred from the claim text.