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11 条记录 (耗时 0.039 秒)

    Process for the preparation of D,L-methionine or the salt thereof
    1.
    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。

    Method for the recovery of aqueous solutions of free, neutral .alpha.-amino acids from aqueous solutions of their alkali-metal salts
    10.
    发明授权
    Method for the recovery of aqueous solutions of free, neutral .alpha.-amino acids from aqueous solutions of their alkali-metal salts 失效
    从其碱金属盐的水溶液中回收游离的中性α-氨基酸的水溶液的方法

    公开(公告)号：US5049283A

    公开(公告)日：1991-09-17

    申请号：US483048

    申请日：1990-02-21

    申请人： Hans-Joachim Hasselbach ,  Axel Kleeman ,  Herbert Klenk ,  Horst Weigel

    发明人： Hans-Joachim Hasselbach ,  Axel Kleeman ,  Herbert Klenk ,  Horst Weigel

    IPC分类号： C07C227/18 ,  B01D15/04 ,  C07C227/16 ,  C07C227/40 ,  C07C229/08

    CPC分类号： C07C227/16

    摘要： Aqueous solutions of free, neutral .alpha.-amino acids are recovered from aqueous solutions of their alkali-metal salts. Two equally large rectifying columns filled with a strongly acidic cation exchanger in the H.sup.+ form are used, the discharge of the first column being connected to the head of the second column. The solution of the alkali-metal salt is at first delivered to the head of the first column, then the residual solution, reduced by the alkali-metal cations adsorbed in the exchanger, is displaced to the second column by means of the addition of water. A product-free forerun is first separated at the discharge of the second column and, when free .alpha.-amino acid begins to exit in the flow-off from the second column, the receiver is changed and the delivery of water to the head of the first column continues further until a mixed pH between 5 and 7 has been achieved in the receiver. Then, the previously first column is decoupled and regenerated, the previously second column, which is now the first column, is coupled to a freshly regenerated column as second column and the entire process is repeated as often as desired.

    摘要翻译： 游离的中性α-氨基酸的水溶液从其碱金属盐的水溶液中回收。 使用填充有H +形式的强酸性阳离子交换器的两个同等大的精馏塔，第一塔的排放物连接到第二塔的头部。 首先将碱金属盐的溶液输送到第一塔的头部，然后通过吸附在交换器中的碱金属阳离子还原的残留溶液通过加入水而置换到第二塔 。 首先在第二柱的排出口处分离出无产物的前驱体，当游离的α-氨基酸在从第二塔的流出物中开始离开时，接收器被改变并且将水输送到 第一列继续进行，直到在接收器中达到5和7之间的混合pH。 然后，先前的第一列被解耦和再生，先前的第二列（现在是第一列）被耦合到作为第二列的新鲜再生的列，并且整个过程根据需要经常重复。