Patent · US Active

Process for preparing unsaturated carboxylic esters

US8258336B2 · kind B2 · utility

0Cited by

3References

7Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Heribert Westermayer · Burghausen, DE
Johann Wagner · Burghausen, DE
Willibald Dafinger · Zweibrücken, DE
Peter Holl · Tübingen, DE

Key dates

Filing date	Apr 21, 2009
Grant date	Sep 4, 2012
Priority date	—
Expiry date	Apr 21, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C67/055
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for preparing unsaturated carboxylic esters includes reaction of alkenes having 2 to 6 carbon atoms with alkanecarboxylic acids having 1 to 6 carbon atoms in the presence of an oxygenous gas and in the presence of a heterogeneous noble metal catalyst by means of a continuous homogeneous gas phase process in a reactor. A gaseous phase (cycle gas) is circulated, and the cycle gas is laden with alkanecarboxylic acid in an acid saturator before entry into the reactor. In a presaturator connected upstream of the acid saturator, the cycle gas is laden with a portion of the amount of alkanecarboxylic acid used for saturation, and then it is transferred to the acid saturator and laden there with the remaining amount of alkanecarboxylic acid.

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