Patent · US Expired

Process for the preparation of a glyoxylic acid ester

US4968833A · kind A · utility

1Cited by

4References

12Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Robert K. Driscoll · Frankfurt am Main, DE
Ernst I. Leupold · Neu-Anspach, DE
Wolfgang Ebertz · Hattersheim, DE
Friedrich Wunder · Flörsheim, DE

Key dates

Filing date	Jan 11, 1985
Grant date	Nov 6, 1990
Priority date	—
Expiry date	Jan 11, 2005

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2219/32466
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a process for the preparation of a glyoxylic acid ester by oxydehydrogenation of the corresponding glycolic acid ester in the gas phase over a supported catalyst in a tubular reactor. The catalyst support consists of at least one cylindrical monolith which essentially has the same diameter as the reactor tube and contains channels with a diameter of 1 to 10 mm leading from the inlet to the outlet of the reactor tube. 60 to 90% of the monolith volume is formed by hollow spaces.

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