公开(公告)号：US5023390A

公开(公告)日：1991-06-11

申请号：US405966

申请日：1989-09-12

申请人： Takafumi Abe ,  Shuji Ebata ,  Hiroshi Machida ,  Koichi Kida

发明人： Takafumi Abe ,  Shuji Ebata ,  Hiroshi Machida ,  Koichi Kida

IPC分类号： B01J21/04 ,  B01J23/86 ,  B01J27/12 ,  C07B61/00 ,  C07C1/00 ,  C07C1/20 ,  C07C1/24 ,  C07C5/41 ,  C07C15/24 ,  C07C45/00 ,  C07C45/46 ,  C07C45/49 ,  C07C49/76 ,  C07C67/00

CPC分类号： C07C45/46 ,  C07C1/24 ,  C07C15/24 ,  C07C45/49 ,  C07C5/412 ,  C07C5/417 ,  C07C2521/04 ,  C07C2521/12 ,  Y02P20/52

摘要： A process for production of 2,6-dimethylnaphthalene is disclosed; comprising the steps: (1) an acylation step where 2,4-dimethylisobutyrophenone is produced from m-xylene, propylene and carbon monoxide: (2) a hydrogenation step where the carbonyl group of the above 2,4-dimethylisobutyrophenone is hydrogenated: and (3) a dehydrogenation and cyclization step where the above hydrogenated product is subjected to dehydrogenation and cyclization to produce the desired 2,6-dimethylnaphthalene. The process enables efficiently producing high quality or high purity 2,6-dimethylnaphthalene.

公开(公告)号：US4983757A

公开(公告)日：1991-01-08

申请号：US500520

申请日：1990-03-28

申请人： Jiro Ishikawa ,  Hirofumi Higuchi ,  Shuji Ebata ,  Koichi Kida

发明人： Jiro Ishikawa ,  Hirofumi Higuchi ,  Shuji Ebata ,  Koichi Kida

IPC分类号： B01J31/02 ,  C07B61/00 ,  C07C67/20 ,  C07C69/54 ,  C07C69/675 ,  C07C231/08 ,  C07C231/10 ,  C07C233/03

CPC分类号： C07C231/08

摘要： Carboxylic acid esters and formamide are efficiently obtained for reacting carboxylic acid amides and formic acid esters, or carboxylic acid amides, alcohols and carbon monoxide in the presence of an alkaline earth metal oxide catalyst.

公开(公告)号：US4950801A

公开(公告)日：1990-08-21

申请号：US456312

申请日：1989-12-26

申请人： Shuji Ebata ,  Hiroyuki Hirayama ,  Hirofumi Higuchi ,  Toshio Kondo ,  Koichi Kida

发明人： Shuji Ebata ,  Hiroyuki Hirayama ,  Hirofumi Higuchi ,  Toshio Kondo ,  Koichi Kida

IPC分类号： C07C231/06

CPC分类号： C07C231/065

摘要： Disclosed is a process for producing .alpha.-hydroxy-carboxylic acid amide represented by the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are as defined in the specification, by a catalytic hydration reaction of cyanohydrin represented by the formula (II): ##STR2## which comprises using a modified manganese dioxide containing one or more of an alkali metal element and an alkaline earth element in an amount of 0.05 to 0.5 based on the manganese element in terms of atomic ratio.

公开(公告)号：US5175366A

公开(公告)日：1992-12-29

申请号：US744954

申请日：1991-08-14

申请人： Shuji Ebata ,  Hiroyuki Hirayama ,  Hirofumi Higuchi ,  Koichi Kida

发明人： Shuji Ebata ,  Hiroyuki Hirayama ,  Hirofumi Higuchi ,  Koichi Kida

IPC分类号： B01J23/34 ,  C07C231/06

CPC分类号： C07C231/065 ,  B01J23/34

摘要： A process for preparing an amide by hydrating a cyanohydrin with a denatured manganese dioxide catalyst. The catalyst is prepared by reacting an aqueous permanganate solution and an aqueous manganese (II) compound solution in an acidic aqueous solution at a temperature of 70.degree. C. to 150.degree. C.

摘要翻译： 通过用变性二氧化锰催化剂使氰醇水合制备酰胺的方法。 该催化剂是通过使高锰酸盐水溶液和含水锰酸（II）化合物溶液在酸性水溶液中在70℃至150℃的温度下反应制备的。

公开(公告)号：US5087737A

公开(公告)日：1992-02-11

申请号：US529910

申请日：1990-05-29

申请人： Hirofumi Higuchi ,  Koichi Kida ,  Shuji Ebata

发明人： Hirofumi Higuchi ,  Koichi Kida ,  Shuji Ebata

IPC分类号： C07C69/54 ,  C07C67/20 ,  C07C67/22 ,  C07C231/06

CPC分类号： C07C231/06 ,  C07C67/20 ,  Y02P20/582

摘要： Disclosed is a process for producing methyl methacrylate which comprises:(I) a step of reacting prussic acid and acetone to form acetonecyanhydrin;(II) a step of hydrating the acetonecyanhydrin obtained in the step (I) to form .alpha.-hydroxyisobutyric acid amide;(III) a step of dehydrating the .alpha.-hydroxyisobutyric acid amide obtained in the step (II) to form methacrylic acid amide;(IV) a step of reacting the methacrylic acid amide obtained in the step (III) and methyl formate to form methyl methacrylate and formamide; and(V) a step of dehydrating formamide separated from the product obtained in the step (IV) to form prussic acid and recycling said prussic acid as a starting material in the step (I).The process produces methyl methacrylate with high selectivity without undesirable by-product such as ammonium sulfate.

公开(公告)号：US5061675A

公开(公告)日：1991-10-29

申请号：US542835

申请日：1990-06-25

申请人： Shuji Ebata ,  Hiroyuki Hirayama ,  Hirofumi Higuchi ,  Koichi Kida

发明人： Shuji Ebata ,  Hiroyuki Hirayama ,  Hirofumi Higuchi ,  Koichi Kida

IPC分类号： B01J23/34 ,  C07B43/06 ,  C07C231/06

CPC分类号： B01J23/34 ,  C07C231/065

摘要： A process for producing a denatured manganese dioxide for the hydration reaction of cyanohydrins comprising reacting an aqueous permanganate salt solution and an aqueous manganese (II) compound in an acidic aqueous solution at a temperature of 70.degree. C. to 130.degree. C. is disclosed. The manganese dioxide catalyst obtained by the process exhibits a high activity over a long period in the preparation of an amide by the hydration of the corresponding cyanohydrin.

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

IPC分类号： B01J31/08 ,  C07B61/00 ,  C07C51/09 ,  C07C59/01

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.

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.

公开(公告)号：US5008479A

公开(公告)日：1991-04-16

申请号：US375860

申请日：1989-07-05

申请人： Takafumi Abe ,  Seiji Uchiyama ,  Takahiro Ojima ,  Koichi Kida

发明人： Takafumi Abe ,  Seiji Uchiyama ,  Takahiro Ojima ,  Koichi Kida

IPC分类号： C07C1/22 ,  C07C1/24 ,  C07C5/41 ,  C07C15/24 ,  C07C45/46 ,  C07C45/49

CPC分类号： C07C45/46 ,  C07C1/22 ,  C07C1/24 ,  C07C15/24 ,  C07C45/49 ,  C07C5/412 ,  C07C5/417 ,  C07C2521/04 ,  C07C2523/04 ,  C07C2523/26 ,  Y02P20/582

摘要： A process for production of 2,6-dimethylnaphthalene is disclosed, comprising the steps: (1) an acylation step where p-tolyl sec-butyl ketone is produced from toluene, n-butene and carbon monoxide: (2) a hydrogenation step where the carbonyl group of the p-tolyl sec-butyl ketone is hydrogenated: and (3) a dehydrogenation and cyclization step where the hydrogenated product obtained above is subjected to dehydrogenation and cyclization to produce the desired 2,6-dimethylnaphthalene. The process enables efficiently producing a high quality or high purity 2,6-dimethylnaphthalene.

公开(公告)号：US5087736A

公开(公告)日：1992-02-11

申请号：US530089

申请日：1990-05-29

申请人： Hirofumi Higuchi ,  Koichi Kida

发明人： Hirofumi Higuchi ,  Koichi Kida

IPC分类号： C07C67/317 ,  C07C67/20 ,  C07C67/327 ,  C07C69/54

CPC分类号： C07C67/20 ,  C07C67/327

摘要： Disclosed is a process for producing methyl methacrylate which comprises:(I) a step of reacting acetone and prussic acid to form acetonecyanhydrin;(II) a step of hydrating the acetonecyanhydrin obtained in the step (I) to form .alpha.-hydroxyisobutyric acid amide;(III) a step of reacting the .alpha.-hydroxyisobutyric acid amide obtained in the step (II) which methyl formate to form methyl .alpha.-hydroxyisobutyrate and formamide;(IV) a step of dehydrating the methyl .alpha.-hydroxyisobutyrate obtained in the step (III) to form methyl methancrylate; and(V) a step of decomposing the formamide obtained in the step (IV) into ammonia and carbon monoxide.The process can produce methyl methacrylate at high yields without by-production of acidic ammonium sulfate.