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    Process for preparing lactate
    1.
    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 producing methyl methacrylate
    4.
    发明授权
    Process for producing methyl methacrylate 失效
    生产甲基丙烯酸甲酯的方法

    公开(公告)号：US5371273A

    公开(公告)日：1994-12-06

    申请号：US135066

    申请日：1993-10-12

    申请人： Yoshikazu Shima ,  Takafumi Abe ,  Hirofumi Higuchi

    发明人： Yoshikazu Shima ,  Takafumi Abe ,  Hirofumi Higuchi

    IPC分类号： B01J29/08 ,  C07B61/00 ,  C07C67/327 ,  C07C69/54 ,  C07C67/00

    CPC分类号： C07C67/327

    摘要： There is disclosed a process for producing methyl methacrylate through gas-phase catalytic reaction of methyl .alpha.-hydroxyisobutyrate which comprises feeding methanol in an amount by weight of 0.1 to 3.0 times the methyl .alpha.-hydroxyisobutyrate in a reactor along therewith and proceeding with the reaction at a reaction temperature in the range of 230.degree. to 300.degree. C. by the use of a transition-type synthetic faujasite zeolite having a specific lattice constant and a specific Na content (Na/Al) as the catalyst. The process is capable of stably producing the objective product having excellent quality in high yield for a long period of time while preventing the problems of early deterioration of the catalyst and coloring of reaction product.

    摘要翻译： 公开了一种通过甲基α-羟基异丁酸甲酯的气相催化反应生产甲基丙烯酸甲酯的方法，该方法包括在反应器中沿着反应器进料甲醇的量为0.1-3.0倍的甲基α-羟基异丁酸甲酯，并进行反应 通过使用具有特定晶格常数和特定Na含量（Na / Al）作为催化剂的过渡型合成八面沸石，反应温度在230℃至300℃的范围内。 该方法能够长期稳定地生产高质量的高品质的目标产物，同时防止催化剂的早期劣化和反应产物的着色。

    Process for producing methacrylic acid
    5.
    发明授权
    Process for producing methacrylic acid 失效
    生产甲基丙烯酸的方法

    公开(公告)号：US5225594A

    公开(公告)日：1993-07-06

    申请号：US759468

    申请日：1991-09-13

    申请人： Yoshikazu Shima ,  Takafumi Abe ,  Hirofumi Higuchi

    发明人： Yoshikazu Shima ,  Takafumi Abe ,  Hirofumi Higuchi

    IPC分类号： B01J23/34 ,  B01J23/72 ,  B01J23/755 ,  C07B61/00 ,  C07C51/377 ,  C07C57/04 ,  C07C57/065 ,  C07C67/20

    CPC分类号： C07C51/377 ,  C07C67/20 ,  Y02P20/582

    摘要： A process for producing methacrylic acid which comprises: (I) producing acetonecyanohydrin from prussic acid and acetone; (II) hydrating the acetonecyanohydrin obtained in step (I) to form .alpha.-hydroxyisobutyric acid amide; (III) reacting the .alpha.-hydroxyisobutyric acid amide obtained in step (II) with methyl formate or with methanol and carbon monoxide to form methyl .alpha.-hydroxyisobutyrate and formamide; (IV) hydrolyzing the methyl .alpha.-hydroxyisobutyrate obtained in step (III) to form .alpha.-hydroxyisobutyric acid; (V) dehydrating the .alpha.-hydroxyisobutyric acid obtained in step (IV) to form methacrylic acid; and (VI) dehydrating the formamide separated from the products obtained in step (III) to form prussic acid and recycling the prussic acid to step (I) as a starting material. The process is capable of producing methacrylic acid from readily available starting materials with a high yield and selectivity, without forming undesirable by-product or waste materials, such as ammonium sulfate.

    Process for producing .alpha.-hydroxyisobutyramide
    6.
    发明授权
    Process for producing .alpha.-hydroxyisobutyramide 失效
    α-羟基异丁酰胺的制备方法

    公开(公告)号：US5463123A

    公开(公告)日：1995-10-31

    申请号：US135062

    申请日：1993-10-12

    申请人： Takako Uchiyama ,  Hirofumi Higuchi

    发明人： Takako Uchiyama ,  Hirofumi Higuchi

    IPC分类号： B01J23/34 ,  B01J37/16 ,  C07B61/00 ,  C07C231/06 ,  C07C235/06

    CPC分类号： C07C231/065 ,  C07C231/06

    摘要： There is disclosed a process for producing .alpha.-hydroxyisobutyramide by hydration reaction of acetone cyanohydrin in the presence of a catalyst consisting essentially of manganese dioxide which process comprises pretreating the catalyst with a reducing agent. The above process is capable of eliminating the catalyst clogging trouble due to the deposition of the by-produced oxamide and thus proceeding with long-term reaction with the stabilized catalyst performance.

    摘要翻译： 公开了在主要由二氧化锰组成的催化剂存在下，通过丙酮氰醇的水合反应制备α-羟基异丁酰胺的方法，该方法包括用还原剂预处理催化剂。 上述方法能够消除由于副产物酰胺沉积引起的催化剂堵塞问题，从而与稳定的催化剂性能进行长期反应。

    Process for preparing a carboxylic acid ester
    7.
    发明授权
    Process for preparing a carboxylic acid ester 失效
    羧酸酯的制备方法

    公开(公告)号：US5703272A

    公开(公告)日：1997-12-30

    申请号：US707135

    申请日：1996-09-03

    申请人： Mariko Abe ,  Shuji Ebata ,  Takafumi Abe ,  Hirofumi Higuchi

    发明人： Mariko Abe ,  Shuji Ebata ,  Takafumi Abe ,  Hirofumi Higuchi

    IPC分类号： B01J21/06 ,  B01J21/08 ,  B01J37/03 ,  C07C67/08 ,  C07C69/02

    CPC分类号： B01J21/063 ,  B01J21/08 ,  B01J37/03 ,  C07C67/08

    摘要： A process for preparing a carboxylic acid ester which includes subjecting a carboxylic acid and an alcohol or a phenol to an esterification reaction in the presence of a silica-titania catalyst. The silica-titania catalyst is prepared by adding an acidic solution containing a silicon compound and a titanium compound dissolved therein to a solution of a basic compound to bring about co-precipitation, in which the acidic solution is a nitric acid-acidic solution or a sulfuric acid-acidic solution, a ratio of the amount (gram equivalent) of nitric acid or sulfuric acid to the amount (mol) of the silicon compound in the acidic solution is 0.5 to 50 and the amount of the titanium compound in the acidic solution is such that a ratio of titania (TiO.sub.2) in the silica-titania catalyst is 1 to 50% by weight.

    摘要翻译： 一种制备羧酸酯的方法，包括在二氧化硅 - 二氧化钛催化剂的存在下使羧酸和醇或酚进行酯化反应。 二氧化硅 - 二氧化钛催化剂通过将含有硅化合物和溶解在其中的钛化合物的酸性溶液加入到碱性化合物的溶液中来进行共沉淀，其中酸性溶液是硝酸 - 酸性溶液或 硫酸 - 酸性溶液，酸性溶液中的硝酸或硫酸的量（克当量）与硅化合物的量（摩尔）的比例为0.5〜50，酸性溶液中钛化合物的量 使得二氧化硅 - 二氧化钛催化剂中的二氧化钛（TiO 2）的比例为1〜50重量％。

    Process for producing hydrogen cyanide
    8.
    发明授权
    Process for producing hydrogen cyanide 失效
    生产氰化氢的方法

    公开(公告)号：US5439661A

    公开(公告)日：1995-08-08

    申请号：US330202

    申请日：1994-10-27

    申请人： Takafumi Abe ,  Shuji Ebata ,  Kazuhiro Sugamura ,  Taiji Matsuzaki ,  Hirofumi Higuchi

    发明人： Takafumi Abe ,  Shuji Ebata ,  Kazuhiro Sugamura ,  Taiji Matsuzaki ,  Hirofumi Higuchi

    IPC分类号： C01C3/02

    CPC分类号： C01C3/0204

    摘要： There is disclosed a process for efficiently producing hydrogen cyanide at a reaction temperature of preferably 250.degree. to 550.degree. C. by a catalytic dehydrative reaction of formamide which comprises employing as a catalyst, a manganese oxide (MnO) and/or a magnesium oxide (MgO) each modified with an alkali metal (Na, K, Rb, Cs, etc. ). The above process is capable of producing hydrogen cyanide at an enhanced conversion efficiency of formamide and at a high selectivity while minimizing the by-production of ammonia. The use of the catalyst comprising as a principal component, MnO modified with an alkali metal is particularly effective in prolonging its service life and enables a long-term stable operation.

    摘要翻译： 公开了通过甲酰胺的催化脱氢反应在优选250-550℃的反应温度下有效地生产氰化氢的方法，该方法包括使用氧化锰（MnO）和/或氧化镁（MnO） MgO），其用碱金属（Na，K，Rb，Cs等）修饰。 上述方法能够以提高甲酰胺的转化效率并以高选择性产生氰化氢，同时最小化氨的副产物。 使用以碱金属为主成分的催化剂MnO特别有效延长其使用寿命，能够长期稳定运行。

    Process for preparing silica-titania catalyst
    9.
    发明授权
    Process for preparing silica-titania catalyst 失效
    制备二氧化硅 - 二氧化钛催化剂的方法

    公开(公告)号：US5587349A

    公开(公告)日：1996-12-24

    申请号：US366812

    申请日：1994-12-30

    申请人： Mariko Abe ,  Shuji Ebata ,  Takafumi Abe ,  Hirofumi Higuchi

    发明人： Mariko Abe ,  Shuji Ebata ,  Takafumi Abe ,  Hirofumi Higuchi

    IPC分类号： B01J21/06 ,  B01J21/08 ,  B01J37/03 ,  C07C67/08

    CPC分类号： B01J21/063 ,  B01J21/08 ,  B01J37/03 ,  C07C67/08

    摘要： A process for preparing a silica-titania catalyst by adding an acidic solution containing a silicon compound such as sodium silicate and a titanium compound such as titanium sulfate dissolved therein to a solution of a compound such as ammonium bicarbonate to bring about co-precipitation, in which the acidic solution is a highly concentrated nitric acid-acidic or sulfuric acid-acidic solution, and a ratio of the dissolved titanium compound in the acidic solution is regulated in a certain range.According to this process, a catalyst capable of exerting a high performance in an esterification reaction and the like can be efficiently obtained.

    摘要翻译： 一种二氧化硅 - 二氧化钛催化剂的制备方法，该方法是将含有硅化钠等硅化合物的酸性溶液和溶解在其中的硫酸钛等钛化合物的酸性溶液加入到碳酸氢铵等化合物的溶液中，进行共沉淀， 酸性溶液是高浓度硝酸 - 酸性或硫酸 - 酸性溶液，并且将溶解的钛化合物在酸性溶液中的比例调节在一定范围内。 根据该方法，可以有效地获得能够在酯化反应等中发挥高性能的催化剂。

    Process for producing methyl .alpha.-hydroxyisobutyrate
    10.
    发明授权
    Process for producing methyl .alpha.-hydroxyisobutyrate 失效
    制备α-羟基异丁酸甲酯的方法

    公开(公告)号：US5391813A

    公开(公告)日：1995-02-21

    申请号：US135247

    申请日：1993-10-12

    申请人： Nobuyuki Muro ,  Takafumi Abe ,  Hirofumi Higuchi

    发明人： Nobuyuki Muro ,  Takafumi Abe ,  Hirofumi Higuchi

    IPC分类号： C07B61/00 ,  C07C67/20 ,  C07C69/675

    CPC分类号： C07C67/20

    摘要： There is disclosed a process for efficiently producing methyl .alpha.-hydroxyisobutyrate from .alpha.-hydroxyisobutyramide and methyl formate by means of reaction distillation which comprises feeding .alpha.-hydroxyisobutyramide and an alkali metal hydroxide in a continuous distillation column to prepare therein the dehydrated condensate of .alpha.-hydroxyisobutyramide with the alkali metal hydroxide as the catalyst and reacting remaining .alpha.-hydroxyisobutyramide with methyl formate in the presence of the dehydrated condensate as the catalyst.According to the above process, the objective methyl .alpha.-hydroxyisobutyrate is continuously obtained in high yield and high selectivity without any operational trouble.

    摘要翻译： 公开了一种通过反应蒸馏从α-羟基异丁酰胺和甲酸甲酯有效生产α-羟基异丁酸甲酯的方法，其中包括在连续蒸馏塔中加入α-羟基异丁酰胺和碱金属氢氧化物，以制备α-羟基异丁酰胺的脱水缩合物 与碱金属氢氧化物作为催化剂，并在脱水缩合物作为催化剂存在下使残余的α-羟基异丁酰胺与甲酸甲酯反应。 根据上述方法，以高产率和高选择性连续获得目标α-羟基异丁酸甲酯，没有任何操作故障。