Patent · US Active

Method for preparing alpha-hydroxycarboxylic acid esters in which ammonia is recycled

US10227284B2 · kind B2 · utility

0Cited by

6References

11Claims

0Family size

Assignee

Evonik Röhm GmbH · DE

Inventors

Steffen Krill · Mühltal, DE
Belaid Ait Aissa · Darmstadt, DE
Alexander May · Seeheim-Jugenheim, DE
Marcel Treskow · Darmstadt, DE

Key dates

Filing date	Sep 4, 2015
Grant date	Mar 12, 2019
Priority date	—
Expiry date	Sep 4, 2035

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01C3/0208
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The present invention relates to a process for preparing alpha-hydroxycarboxylic esters proceeding from hydrogen cyanide, wherein the ammonia formed in the step of alcoholysis of the corresponding alpha-hydroxycarboxamide is recycled into a hydrogen cyanide preparation process after a purification step.

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