[EN] PROCESSES FOR THE PREPARATION OF ALPHA-HYDROXY ESTERS VIA GRIGNARD COUPLING AND THIOLATION REACTIONS [FR] PROCÉDÉS DE PRÉPARATION D'ESTERS ALPHA-HYDROXY PAR COUPLAGE DE GRIGNARD ET RÉACTIONS DE THIOLATION
[EN] A PROCESS FOR THE PREPARATION OF METHIONINE ALPHA-HYDROXY ANALOGUES FROM SUGARS AND DERIVATIVES THEREOF<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ANALOGUES D'ALPHA-HYDROXYLATION DE L-MÉTHIONINE À PARTIR DE SUCRES ET DE DÉRIVÉS DE CEUX-CI
申请人:HALDOR TOPSOE AS
公开号:WO2016174231A1
公开(公告)日:2016-11-03
A process for the preparation of methionine a-hydroxy analogue and derivatives thereof comprising contacting one or more sugars or derivatives thereof with a metallo-silicate composition in the presence of a compound comprising sulphur and a solvent.
Process for the preparation of hydroxy 4-methyl thiobutyric acid esters
申请人:——
公开号:US20010029308A1
公开(公告)日:2001-10-11
A process, for the preparation of an ester of 2-hydroxy-4-methylthiobutyric acid which is substantially in the monomeric form, which process, being capable of industrial application and which comprises reacting 2-hydroxy-4-methylthiobutyric acid with an alcohol in the presence of water and an acid catalyst at a temperature of from 30 to 150° C. wherein the acid is the direct product of the hydrolysis of 2-hydroxy-4-methylthiobutyronitrile.
Process for preparing esters of lactic acid, and 2-hydroxy-3-butenoic acid or α-hydroxy methionine analogues from sugars
申请人:Haldor Topsøe A/S
公开号:US10100007B2
公开(公告)日:2018-10-16
A continuous flow process for the preparation of one or more esters of lactic acid and 2-hydroxy-3-butenoic acid or α-hydroxy methionine analogs from a sugar in the presence of a solid Lewis acid catalyst and a solvent comprising an organic solvent and water. The invention provides a means for stabilizing a Lewis acid catalyst for use in a continuous reaction process wherein the water is present in an amount of up to or equal to 10 vol. % of the organic solvent.
Process for the preparation of methionine alpha-hydroxy analogues from sugars and derivatives thereof
申请人:HALDOR TOPSØE A/S
公开号:US10189778B2
公开(公告)日:2019-01-29
A process for the preparation of methionine a-hydroxy analogue and derivatives thereof comprising contacting one or more sugars or derivatives thereof with a metallo-silicate composition in the presence of a compound comprising sulphur and a solvent.