Method for preparation of methionine

• Main Authors: GEIST LUCAS, BORGMANN CORNELIA, RENNER CHRISTOPH, BILZ JURGEN, RONNEBURG AXEL, FISCHER ANDREAS, REUS CHRISTIAN, NORDSCHILD ANJA
• Format: Patent
• Language: Chinese; English
• Published: 14.09.2021
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The present invention relates to a method for the preparation of methionine comprising the step of contacting a solution or suspension comprising 2-amino-4-(methylthio)butanenitrile and/or 2-amino-4-(methylthio)butaneamide with water in the presence of a catalyst to obtain a methionine-containing mixture, wherein the catalyst comprises CeO2 comprising particles, wherein the CeO2 comprising particles comprise from 50 to 100 wt.-% of CeO2, have a BET surface area of from 35 to 65 m2/g measured according to DIN ISO 9277-5 (2003), a mean maximum Feret diameter xFmax of from 10 to 40 nm and a mean minimum Feret diameter xFmin of from 5 to 30 nm, both measured according to DIN ISO 9276-6 (2012). 本发明涉及一种用于制备甲硫氨酸的方法，其包括在催化剂的存在下使包含2-氨基-4-(甲硫基)丁腈和/或2-氨基-4-(甲硫基)丁酰胺的溶液或悬浮液与水接触以得到包含甲硫氨酸的混合物的步骤，其中所述催化剂包含含CeO2颗粒，所述含CeO2颗粒包含50-100重量％的CeO2，具有根据DIN ISO9277-5(2003)测定的35-65m2/g的BET表面积，以及均根据DIN ISO 9276-6(2012)测定的10-40nm的平均最大Feret直径XFmax,平均和5-30nm的平均最小Feret直径XFmin,平均。