VERFAHREN ZUR HERSTELLUNG EINES KRISTALLINEN L-MGDA-TRIALKALIMETALLSALZES

    公开(公告)号:EP2705022A1

    公开(公告)日:2014-03-12

    申请号:EP12716431.7

    申请日:2012-04-25

    Applicant: BASF SE

    CPC classification number: C07C227/42 C07C229/04

    Abstract: What is proposed is a process for preparing a crystalline L-MGDA tri-alkali metal salt by crystallization from an aqueous solution thereof which has been obtained by Strecker synthesis proceeding from L-α-alanine, by reaction with formaldehyde and hydrogen cyanide to give L-α-alanine-N,N-diacetonitrile and subsequent alkaline hydrolysis of the L-α-alanine-N,N-diacetonitrile to give the L-MGDA tri-alkali metal salt, which is characterized in that a temperature of 150°C is not exceeded in the course of alkaline hydrolysis.

    Abstract translation: 所提出的是一种制备结晶L-MGDA三碱金属盐的方法,该方法是通过从由Strecker合成从L-α-丙氨酸进行的水溶液中结晶,通过与甲醛和氰化氢反应得到L -α-丙氨酸-N,N-二乙腈,随后碱性水解L-α-丙氨酸-N,N-二乙腈,得到L-MGDA三碱金属盐,其特征在于温度为150℃ 在碱性水解过程中不超过。

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