Patent · US Active

Method for producing vinyl acetate

US10947178B2 · kind B2 · utility

1Cited by

1References

5Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Willibald Dafinger · Zweibrücken, DE
Brigitte Patsch · Burghausen, DE
Guenther Rudolf · Dahme/Mark, DE

Key dates

Filing date	Nov 21, 2017
Grant date	Mar 16, 2021
Priority date	—
Expiry date	Nov 21, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2523/44
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Fouling of the acetic acid saturator by recycle gas in the continuous gas phase process for manufacture of vinyl acetate is reduced by adding an N-oxyl fouling inhibitor to the saturator and/or at one or more other addition sites in the process, in amounts such that the concentration of N-oxyl compound which accumulates in the saturator bottoms is from 10 to 100 ppm. The amount of N-oxyl compound in the saturator is preferably from 10-50 ppm. The reduction in fouling is evidenced by lessening the lowering of the heat transfer coefficient of the saturator over time.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.