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    Continuous process for the manufacture of methionine
    2.
    发明授权
    Continuous process for the manufacture of methionine 失效
    连续生产甲硫氨酸的方法

    公开(公告)号：US4069251A

    公开(公告)日：1978-01-17

    申请号：US713822

    申请日：1976-08-12

    申请人： Sven Peter Mannsfeld ,  Arno Pfeiffer ,  Herbert Tanner ,  Hans Wagner ,  Erich Liebetanz, deceased

    发明人： Sven Peter Mannsfeld ,  Arno Pfeiffer ,  Herbert Tanner ,  Hans Wagner ,  Erich Liebetanz, deceased

    IPC分类号： C07D233/76 ,  C07C149/247

    CPC分类号： C07D233/76

    摘要： In a continuous process 5-(.beta.-methylmercaptoethyl)-hydantoin is subjected to hydrolysis at an elevated temperature and elevated pressure in an aqueous solution of alkali carbonate or alkali bicarbonate or a mixture of these two compounds. The ammonia and carbon dioxide which form during the hydrolysis are removed and when the hydrolysis is complete the methionine is separated by means of carbon dioxide and the mother liquor is recirculated into the process after replenishing with fresh amounts of said hydantoin.

    摘要翻译： 在连续方法中，5-（β-甲基巯基乙基） - 乙内酰脲在碱性碳酸盐或碱式碳酸氢盐或这两种化合物的混合物的水溶液中在升高的温度和升高的压力下进行水解。 去除在水解过程中形成的氨和二氧化碳，当水解完成时，甲硫氨酸通过二氧化碳分离，并且在用新鲜量的所述乙内酰脲补充后，母液再循环进入该过程。

    Process for the preparation of D,L-methionine or the salt thereof
    4.
    发明授权
    Process for the preparation of D,L-methionine or the salt thereof 失效
    制备D，L-甲硫氨酸或其盐的方法

    公开(公告)号：US5990349A

    公开(公告)日：1999-11-23

    申请号：US37020

    申请日：1998-03-09

    申请人： Friedhelm Geiger ,  Baudouin Halsberghe ,  Hans-Joachim Hasselbach ,  Klaus Hentschel ,  Klaus Huthmacher ,  Martin Korfer ,  Sven-Peter Mannsfeld ,  Herbert Tanner ,  Ferdinand Theissen ,  Jose Vanrobaeys ,  Klaus Willigerodt

    发明人： Friedhelm Geiger ,  Baudouin Halsberghe ,  Hans-Joachim Hasselbach ,  Klaus Hentschel ,  Klaus Huthmacher ,  Martin Korfer ,  Sven-Peter Mannsfeld ,  Herbert Tanner ,  Ferdinand Theissen ,  Jose Vanrobaeys ,  Klaus Willigerodt

    IPC分类号： C07C319/20 ,  C07C319/28 ,  C07C323/58 ,  C07D233/76 ,  C07C321/00 ,  C07C315/00

    CPC分类号： C07C319/20 ,  C07C319/28 ,  C07D233/76

    摘要： A process for the preparation of methionine or a salt of methionine by reaction of the components 3-methylmercaptopropionaldhyde, hydrogen cyanide, ammonia and carbon dioxide or components from which the above-mentioned components can be prepared, optionally in the presence of water, to 5-(2-methylmercaptoethyl)-hydantoin and further reaction thereof to methionine or the salt thereof, characterised in that the reaction of the components is initiated by means of at least one premixture in such a way that a first mixture is formed containing at least the predominant proportion (at least 5/10) of the 3-methylmercaptopropionaldeyde and at least 1/10 of the hydrogen cyanide component or corresponding quantities of components from which these components can be prepared, and less than 5/10 of one of the components ammonia, carbon dioxide or of the components from which ammonia or carbon dioxide can be prepared, and in that this first mixture is combined with the other component(s) for the reactive conversion to 5-(2-methylmercaptoethyl)-hydantoin, wherein this (these) latter component(s) may be premixed in one or more other mixtures.

    摘要翻译： 通过将3-甲基巯基丙酸，氰化氢，氨和二氧化碳或可由其制备上述组分的组分，任选地在水存在下，将组分3-甲基巯基丙酸，氰化氢，氨和二氧化碳或组分反应制备甲硫氨酸或甲硫氨酸的方法， - （2-甲基巯基乙基） - 乙内酰脲及其与甲硫氨酸或其盐的反应，其特征在于，组分的反应通过至少一种预混物引发，使得形成第一混合物至少含有 3-甲基巯基丙酸的主要比例（至少+ E，fra 5/10 + EE）和氰化氢组分的至少+ E，fra 1/10 + EE或可以制备这些组分的相应量的组分， 并且可以制备氨，二氧化碳或其中可以制备氨或二氧化碳的组分之一的小于+ E，fra 5/10 + EE，并且因为该第一混合物与 反应转化成5-（2-甲基巯基乙基） - 乙内酰脲的其它组分，其中这些（这些）后一种组分可以在一种或多种其它混合物中预混合。