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15 条记录 (耗时 0.017 秒)

    Process for preparing lactamide
    1.
    发明授权
    Process for preparing lactamide 失效
    制备酰胺的方法

    公开(公告)号：US5756842A

    公开(公告)日：1998-05-26

    申请号：US729385

    申请日：1996-10-11

    申请人： Fumio Tanaka ,  Tsumoru Morimoto ,  Takako Uchiyama ,  Takafumi Abe

    发明人： Fumio Tanaka ,  Tsumoru Morimoto ,  Takako Uchiyama ,  Takafumi Abe

    IPC分类号： C07C231/06

    CPC分类号： C07C231/065

    摘要： There is herein disclosed a process for preparing a lactamide by hydrating lactonitrile in the presence of a catalyst mainly comprising a manganese oxide, and a nitrogen-containing compound such as ammonia or diethylamine. According to this process, the lactamide can be obtained from lactonitrile in a high yield, while the high activity of the catalyst is maintained for a long period of time.

    摘要翻译： 本文公开了一种通过在主要包含氧化锰的催化剂和含氨化合物如氨或二乙胺的存在下使乳腈水合制备乳酰胺的方法。 根据该方法，可以高产率从乳腈获得乳酰胺，同时保持催化剂的高活性长时间。

    Process for preparing lactate
    2.
    发明授权
    Process for preparing lactate 失效
    制备乳酸盐的方法

    公开(公告)号：US5824818A

    公开(公告)日：1998-10-20

    申请号：US698478

    申请日：1996-08-15

    申请人： Takafumi Abe ,  Toshiyuki Gotoh ,  Takako Uchiyama ,  Hirofumi Higuchi ,  Yoshikazu Shima ,  Kazuto Ikemoto

    发明人： Takafumi Abe ,  Toshiyuki Gotoh ,  Takako Uchiyama ,  Hirofumi Higuchi ,  Yoshikazu Shima ,  Kazuto Ikemoto

    IPC分类号： C07C67/20 ,  C07C69/66

    CPC分类号： C07C67/20

    摘要： A process for preparing a lactate which includes: (a) preparing lactonitrile from prussic acid and acetaldehyde, (b) hydrating the lactonitrile to form lactamide, (c) forming the desired lactate and formamide from lactamide and formate (or methanol and carbon monoxide), (d) separating and collecting components, having a lower boiling point than that of lactate from the reaction liquid in step (c), by distillation under specified conditions, and (e) dehydrating formamide from step (d) to form prussic acid and recycling the prussic acid to step (a). Heretofore, lactates had been manufactured by forming lactonitrile (cyanohydrin) from acetaldehyde and prussic acid, and then esterifying lactonitrile with a mineral acid or the like. However, in this conventional process, ammonium salts were formed as by-products in an amount equal to that of the lactate. According to the present invention, a lactate can be efficiently manufactured on a commercial scale without forming a large amount of the ammonium salts as by-products. In particular, the yield of the lactate can be increased by controlling the formation of 2-formyloxy propionate and also a dimer of a lactate.

    摘要翻译： 一种制备乳酸的方法，其包括：（a）从丙二酸和乙醛制备乳腈，（b）使乳腈水合形成乳酰胺，（c）从乳酰胺和甲酸盐（或甲醇和一氧化碳）形成所需的乳酸盐和甲酰胺， ，（d）在步骤（c）中通过蒸馏从特定条件下蒸馏分离和收集沸点低于乳酸盐的组分，并且（e）从步骤（d）中将甲酰胺脱水形成二甲苯， 将重要的酸回收到步骤（a）。 迄今为止，已经通过从乙醛和氢溴酸形成乳腈（氰醇），然后用无机酸等使乳腈酯化来制造乳酸盐。 然而，在该常规方法中，形成铵盐，其量等于乳酸盐的副产物。 根据本发明，可以以商业规模有效地制造乳酸盐，而不会形成大量的作为副产物的铵盐。 特别地，通过控制2-甲酰氧基丙酸酯和乳酸二聚体的形成可以提高乳酸产率。

    Process for the preparation of carboxylic acid esters
    6.
    发明授权
    Process for the preparation of carboxylic acid esters 失效
    羧酸酯的制备方法

    公开(公告)号：US4613684A

    公开(公告)日：1986-09-23

    申请号：US655331

    申请日：1984-09-27

    申请人： Tetsuo Aoyama ,  Koichi Kida ,  Takako Uchiyama

    发明人： Tetsuo Aoyama ,  Koichi Kida ,  Takako Uchiyama

    IPC分类号： C07C67/20 ,  C07C69/54 ,  C07C69/675 ,  C07C69/68 ,  C07C103/127

    CPC分类号： C07C69/675 ,  C07C67/20 ,  C07C69/54 ,  C07C69/68 ,  Y02P20/582

    摘要： A commercially economical process for preparing a carboxylic acid ester from a carboxylic acid amide is disclosed. The process is very meritorious, since it produces neither ammonia nor ammonium sulfates. Rather, the process by-produces formamides which are very useful compounds as solvents. Further, formamide can easily be converted to hydrogen cyanide by dehydration. The process comprises reacting a carboxylic acid amide with a formic acid ester and/or methanol and carbon monoxide in the presence of a bicyclic amidine or tertiary amine catalyst and optionally in the co-existence of a metal carbonyl. An industrial process for preparing methyl methacrylate which is a materialization of the process shown above is described in detail referring to a figure.

    摘要翻译： 公开了一种从羧酸酰胺制备羧酸酯的商业经济方法。 该方法非常有价值，因为它不产生氨和硫酸铵。 相反，该方法副产生甲酰胺，其是非常有用的化合物作为溶剂。 此外，甲酰胺可以通过脱水容易地转化为氰化氢。 该方法包括在双环脒或叔胺催化剂的存在下，任选地在羰基金属的共存下使羧酸酰胺与甲酸酯和/或甲醇和一氧化碳反应。 下面参照附图详细描述制备甲基丙烯酸甲酯的工业过程，这是上述过程的实现。

    Process for producing catalyst for cyanhydrin hydration and product of the process
    7.
    发明授权
    Process for producing catalyst for cyanhydrin hydration and product of the process 有权
    用于生产氰醇水合催化剂的方法和该方法的产物

    公开(公告)号：US07704917B2

    公开(公告)日：2010-04-27

    申请号：US11994629

    申请日：2006-07-06

    申请人： Hideho Matsuda ,  Takako Uchiyama ,  Yoshikazu Shima ,  Masaki Takemoto

    发明人： Hideho Matsuda ,  Takako Uchiyama ,  Yoshikazu Shima ,  Masaki Takemoto

    IPC分类号： B01J23/32 ,  C01G45/12 ,  C07C231/00

    CPC分类号： B01J23/34 ,  B01J35/1014 ,  B01J35/1042 ,  B01J35/1066 ,  B01J37/0236 ,  B01J37/03 ,  C07C231/06 ,  C07C235/06

    摘要： A process for producing a catalyst for cyanhydrin hydration, which comprises a manganese oxide as a main component and is excellent in both physical strength and reaction activity, is provided, as well as a catalyst for cyanhydrin hydration obtained by the production process. Specifically, a process for producing a catalyst which is useful for cyanhydrin hydration and contains a manganese oxide as a main component, potassium, and one or more elements selected from the group consisting of bismuth, vanadium and tin, in which the above compounds are mixed together in an aqueous system; the resulting slurry precipitate is subjected to solid-liquid separation; and the resulting hydrous cake is dried in at least two separate stages comprising a predrying and a main drying, is provided, as well as a catalyst for cyanhydrin hydration obtained by the production process.

    摘要翻译： 本发明提供一种生产氰醇水合催化剂的方法，该方法包括以氧化锰为主要成分，并具有优异的物理强度和反应活性，以及​​通过制备方法获得的氰醇水合催化剂。 具体而言，可以使用用于氰醇水合并含有氧化锰作为主要成分的催化剂的方法，钾和选自铋，钒和锡中的一种或多种元素，其中混合上述化合物 一起在水系统中; 将所得浆料沉淀物进行固液分离; 并且将所得含水饼在包括预干燥和主干燥的至少两个分开的阶段中进行干燥，以及通过生产方法获得的用于氰醇水合的催化剂。

    Process for recimization of an optically active alpha-amino acid amides and process for producing optically active alpha-amino acids
    8.
    发明授权
    Process for recimization of an optically active alpha-amino acid amides and process for producing optically active alpha-amino acids 失效
    用于重新获得光学活性α-氨基酸酰胺的方法和用于制备光学活性α-氨基酸的方法

    公开(公告)号：US4918196A

    公开(公告)日：1990-04-17

    申请号：US831915

    申请日：1986-02-21

    申请人： Masaharu Doya ,  Toshio Kondo ,  Hideo Igarashi ,  Takako Uchiyama

    发明人： Masaharu Doya ,  Toshio Kondo ,  Hideo Igarashi ,  Takako Uchiyama

    IPC分类号： C07D233/72 ,  C12P13/04 ,  C12P41/00

    CPC分类号： C12P41/006 ,  C12P13/04

    摘要： A process for optically isomerizing an optically active alpha-amino acid amide comprising heating a D-alpha-amino acid amide or an L-alpha-amino acid amide in the presence of a strongly basic compound; and a process for producing an L-alpha-amino acid, which comprises(1) subjecting a D,L-alpha-amino acid amide or a mixture of a major amount of a D-alpha-amino acid amide and a minor amount of an L-alpha-amino acid amide to the action of a microorganism having the ability to hydrolyze the L-alpha-amino acid to obtain a hydrolyzate containing the L-alpha-amino acid and D-alpha-amino acid,(2) separating the L-alpha-amino acid from the hydrolyzate and recovering the remaining D-alpha-amino acid amide.(3) heating all or part of the recovered D-alpha-amino acid amide in the presence of a strongly basic substance to obtain a D,L-alpha-amino acid amide or a mixture of a major amount of the D-alpha-amino acid amide and a minor amount of the L-alpha-amino acid amide, and(4) recycling the D,L-alpha-amino acid amide or the mixture to step (1) as part or all of the starting material.

    摘要翻译： 包括光学异构化光学活性α-氨基酸酰胺的方法，包括在强碱性化合物存在下加热D-α-氨基酸酰胺或L-α-氨基酸酰胺; 以及制备L-α-氨基酸的方法，其包括（1）使D，L-α-氨基酸酰胺或主要量的D-α-氨基酸酰胺和少量的 L-α-氨基酸酰胺，具有水解L-α-氨基酸的能力的微生物的作用，得到含有L-α-氨基酸和D-α-氨基酸的水解产物，（2）分离 来自水解产物的L-α-氨基酸并回收剩余的D-α-氨基酸酰胺。 （3）在强碱性物质存在下加热全部或部分回收的D-α-氨基酸酰胺，得到D，L-α-氨基酸酰胺或大量D-α-氨基酸酰胺的混合物， 氨基酸酰胺和少量的L-α-氨基酸酰胺，和（4）将D，L-α-氨基酸酰胺或混合物循环到步骤（1）中作为起始原料的一部分或全部。