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专利名称：METHOD FOR PRODUCING
METHYLGLYCINE-N,N-DIETHANOIC ACID-TRIALKALI METAL SALTS WITH A LOW BY-PRODUCT CONTENT
发明人：OFTRING, ALFRED,BRAUN,
GEROLD,WIRSING, FRIEDRICH,STAMM,ARMIN,BALDENIUS, KAI-UWE
申请号：EP06743390.4申请日：20060502公开号：EP1881957A1公开日：20080130
摘要：The invention relates to a method for producing a light-coloured
methylglycine-N,N-diethanoic acid trialkali metal salt with a low by-product content, bythe alkaline hydrolysis of methylglycine diacetonitrile, said method comprises steps thatare carried out in the order (a) to (f): (a) mixing of the methylglycine diacetonitrile with anaqueous alkali lye at a temperature of = 30 °C; (b) the aqueous alkali methylglycinediacetonitrile suspension is then reacted at a temperature ranging between 10 and 30 °Cfor a period of 0.1 to 10 h, to form a solution; (c) the solution obtained in step (b) is thenreacted at a temperature ranging between 30 to 40 °C for a period of 0.1 to 10 h; (d)optionally the solution obtained in step (c) is reacted at a temperature ranging between50 and 80 °C for a period of between 0.5 and 2 h; (e) optionally the solution obtained instep (c) or (d) is reacted at a temperature ranging between 110 and 200 °C for a period ofbetween 5 and 60 min; (f) hydrolysis and isolation of ammonia from the solution obtained
in step (c), (d) or (e) by stripping at a temperature of between 90 and 105 °C.
申请人：BASF AKTIENGESELLSCHAFT
地址：67056 Ludwigshafen DE
国籍：DE
代理机构：Isenbruck, Günter
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