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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。
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公开(公告)号：US5312966A
公开(公告)日：1994-05-17
申请号：US944359
申请日：1992-09-14
IPC分类号： B01J31/08 , C07B61/00 , C07C67/20 , C07C67/36 , C07C69/14 , C07C69/54 , C07C69/675 , C07C231/08 , C07C233/03 , C07C69/34 , C07C69/68
CPC分类号： C07C67/20
摘要： There is disclosed a process for efficiently producing a carboxylic acid ester and formamide by reacting a carboxylic acid amide with a formic acid ester or with an alcohol and carbon monoxide in the presence of a strongly basic anion-exchange resin. By the use of the strongly basic anion-exchange resin as the catalyst, the process of the present invention enables the efficient production of the carboxylic acid ester as well as formamide from the Carboxylic acid amide and Formic acid ester, etc. with a high selectivity under mild reaction conditions and facilitates the separation of the catalyst from the reaction product, thereby greatly enhancing the industrial significance of itself.
摘要翻译： 公开了在强碱性阴离子交换树脂存在下，使羧酸酰胺与甲酸酯或与醇和一氧化碳反应，有效地制备羧酸酯和甲酰胺的方法。 通过使用强碱性阴离子交换树脂作为催化剂，本发明的方法能够以高选择性从羧酸酰胺和甲酸酯等有效地制备羧酸酯以及甲酰胺 在温和的反应条件下，促进了催化剂与反应产物的分离，从而大大增强了其自身的工业意义。
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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
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。
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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。
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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.
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公开(公告)号：US5439661A
公开(公告)日：1995-08-08
申请号：US330202
申请日：1994-10-27
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。
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公开(公告)号：US5053535A
公开(公告)日：1991-10-01
申请号：US618058
申请日：1990-11-23
申请人： Yoshikazu Shima , Takafumi Abe , Hirofumi Higuchi , Koichi Kida
发明人： Yoshikazu Shima , Takafumi Abe , Hirofumi Higuchi , Koichi Kida
CPC分类号： C07C51/09
摘要： A process for producing an .alpha.-hydroxyisobutyric acid which comprises hydrolyzing .alpha.-hydroxyisobutyric acid ester in the presence of an organic sulfonic acid catalyst, using an .alpha.-hydroxyisobutyric acid ester as the starting material.According to said process, .alpha.-hydroxyisobutyric acid can be efficiently produced.
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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
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。
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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
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％。
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10.发明授权Process for preparing .alpha., .beta.-unsaturated carboxylic acid ester 失效制备（ALPHA），（BETA） - 饱和羧酸酯的方法
公开(公告)号：US5075493A
公开(公告)日：1991-12-24
申请号：US618040
申请日：1990-11-23
申请人： Yoshikazu Shima , Takafumi Abe , Hirofumi Higuchi , Koichi Kida
发明人： Yoshikazu Shima , Takafumi Abe , Hirofumi Higuchi , Koichi Kida
IPC分类号： B01J27/053 , B01J27/16 , B01J29/08 , C07B61/00 , C07C67/327 , C07C69/54
CPC分类号： C07C67/327
摘要： A process for producing .alpha., .beta.-unsaturated carboxylic acid ester which comprises catalytically reacting .alpha.-hydroxycarboxylic acid ester with crystalline aluminosilicate catalyst, and then catalytic reacting the resulting reaction product with solid acid catalyst.According to the process, .alpha., .beta.-unsaturated carboxylic acid ester of a high purity, and a high quality, without by-product, can be produced efficiently.
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