US 12,428,360 B2 · Abating unwanted emulsion polymerization during extractive distillation of conjugated diene monomers

Abstract

Inhibitor compositions for abating undesirable emulsion polymerization during processing of hydrocarbon stream laden with 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 using the compositions of the disclosure are also provided. The methods of inhibiting polymerization of monomers include a step of adding a composition of the disclosure to a process stream. The process stream includes an ethylenically unsaturated monomer that is suspended in the bulk-phase and highly polar solvents as distractive distillation solvents.

Claims18

Dependent claims

A method of inhibiting monomer polymerization, comprising:

adding a composition to a process stream comprising an ethylenic unsaturated monomer in an extractive distillation process,
wherein the composition comprises a first inhibitor compound comprising a stable nitroxide radical;
and a second inhibitor compound comprising a phenylenediamine,
wherein the process stream further comprises micelles, at least one polar extractive distillation solvent, and at least one non-polar extractive distillation solvent, in which the ethylenic unsaturated monomer is present, and wherein the at least one polar extractive distillation solvent and the at least one non-polar extractive distillation solvent are immiscible with each other.

1 more element

Dependencies are inferred from the claim text.

Abating unwanted emulsion polymerization during extractive distillation of conjugated diene monomers

Life of this patent

Abating unwanted emulsion polymerization during extractive distillation of conjugated diene monomers

Life of this patent

Abstract

Claims18