Salt-free production of methionine from methionine nitrile

US12172950B2 · kind B2 · utility

Assignee

• Evonik Operations GmbH · DE

Inventors

• Jürgen Bilz · Neuses, DE
• Cornelia Borgmann · Frankfurt, DE
• Lucas Geist · Neuses, DE
• Harald Jakob · Hasselroth, DE
• Martin Körfer · Goldbach, DE
• Christian Reus · Neuses, DE
• Daniel ROST · Lampertheim, DE

Key dates

• Filing date: Feb 3, 2020
• Grant date: Dec 24, 2024
• Expiry date: Mar 11, 2042

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2208/00557
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention refers to the use of a particulate catalyst containing 60.0 to 99.5 wt. % ZrO2 stabilised with an oxide of the element Hf and at least one oxide of the element M, wherein M=Ce, Si, Ti, or Y, for the hydrolysis reaction of methionine amide to methionine, wherein the median particle size x50 of the particulate catalyst is in the range of from 0.8 to 9.0 mm, preferably of from 1.0 to 7.0 mm. The invention also refers to a process for preparing methionine comprising a step of contacting a solution or suspension comprising methionine amide and water with said particulate catalyst to provide a reaction mixture comprising methionine and/or its ammonium salt from which methionine can be isolated.