专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

71. 发明授权

US06052099A Multibeam antenna 失效
公开(公告)号：US06052099A
公开(公告)日：2000-04-18
申请号：US252984
申请日：1999-02-19
申请人： Hiroaki Imaizumi , Koji Sakauchi , Shuji Hagiwara , Hirofumi Higuchi , Ryotaro Manabe
发明人： Hiroaki Imaizumi , Koji Sakauchi , Shuji Hagiwara , Hirofumi Higuchi , Ryotaro Manabe
IPC分类号： H01Q1/24 , H01Q13/06 , H01Q19/17 , H01Q25/00 , H01Q19/12
CPC分类号： H01Q13/065 , H01Q1/247 , H01Q19/17 , H01Q25/00
摘要： When a converter 14 is rotated via a rotation mechanism 17, the arrangement inclination angle of two primary radiators 15a and 15b can be adjusted in the range of 0 to 20 deg. with respect to an axis which is in parallel with the ground. Also the reception polarization angle due to probes of the primary radiators 15a and 15b can be adjusted in the range of 0 to 20 deg. while maintaining a preset difference in polarization angle among the satellites. Therefore, the arrangement inclination angle of the primary radiators 15a and 15b for respectively receiving signals from the two satellites, and the reception polarization angle in the primary radiators 15a and 15b can be simultaneously easily adjusted by rotating the converter 14 via the rotation mechanism 17.

72. 发明授权

US5824818A Process for preparing lactate 失效
标题翻译：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。

73. 发明授权

US5463123A Process for producing .alpha.-hydroxyisobutyramide 失效
标题翻译： 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。

74. 发明授权

US5391813A Process for producing methyl .alpha.-hydroxyisobutyrate 失效
标题翻译：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。

75. 发明授权

US5312966A Process for production of carboxylic acid ester and formamide 失效
标题翻译：羧酸酯和甲酰胺的生产方法
公开(公告)号：US5312966A
公开(公告)日：1994-05-17
申请号：US944359
申请日：1992-09-14
申请人： Takafumi Abe , Yoshiyuki Nishide , Nobuyuki Muro , Hirofumi Higuchi
发明人： Takafumi Abe , Yoshiyuki Nishide , Nobuyuki Muro , Hirofumi Higuchi
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。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式