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US 2023/0312477 A1Published application
Inhibitor of vapor space polymerization
AssigneeEcolab USA Inc.
InventorsZhenxing XI, Pedro Jorge Carvalho CAMPOS, Debby ROSSANA, Jonathan MASERE
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Abstract
Inhibitor compositions for abating undesirable polymerization in the vapor space during purification of reactive vinylic monomers are provided. The polymerization inhibitor compositions include at least a first inhibitor compound having a stable nitroxide radical and a second inhibitor including phenylenediamine. Methods of inhibiting the polymerization of monomers in the vapor-space using the compositions of the disclosure are also provided.
Claims15
A method of inhibiting vapor-space monomer polymerization, comprising:
- adding a composition to a process stream in a monomer purification process,
- wherein the composition comprises a first inhibitor compound comprising a stable nitroxide radical;
- and a second inhibitor compound comprising a phenylenediamine.
Dependencies are inferred from the claim text.