-
公开(公告)号：EP0292951B1
公开(公告)日：1994-03-16
申请号：EP88108368.7
申请日：1988-05-26
-
公开(公告)号：EP0254229A1
公开(公告)日：1988-01-27
申请号：EP87110406.3
申请日：1987-07-17
CPC分类号： C07C209/08
摘要： A process for producing of N,N'-dialkylalkanediamines represented by the formulae (I), (11) or (III),
wherein R is a lower alkyl group and R' to R 8 are each hydrogen atom or a lower alkyl group, which comprises reacting the corresponding dichloroalkanes represented by Formulae (IV), (V) or (VI),
wherein R' to R 8 are as defined above with a lower alkyl primary amine represented by Formula (VII),
wherein R is as defined above substantially in the absence of water.摘要翻译： 一种生产式（I），（11）或（III）所代表的N，N'-二烷基链烷二胺的方法，其中R是低级烷基，R'至R8各自是氢原子或低级烷基， 包括使由式（IV），（V）或（VI）表示的相应的二氯烷烃（其中R 1至R 8如上定义）与式（VII）表示的低级烷基伯胺反应，其中R基本上如上定义 缺水。
-
公开(公告)号：EP0707024A3
公开(公告)日：1996-06-05
申请号：EP95115963.1
申请日：1995-10-10
发明人： Yoshida, Yasunori, 405 Higashi-Totsuka-Ryo. , Watanabe, Katsuji , Obuchi, Shoji , Ohta, Masahiro
CPC分类号： C08G63/90
摘要： The invention relates to a purification process for polyhydroxycarboxylic acids which comprises dissolving a polyhydroxycarboxylic acid in an water-immiscible phenol or an organic solvent containing said water-immiscible phenol, successively bringing the resulting solution into contact with water which contains an acidic material, separating the organic layer from an aqueous layer, and isolating polyhydroxycarboxylic acid from the organic layer; and the process of the invention can efficiently remove a catalyst contained in polyhydroxycarbo xylic acid prepared in the presence of the catalyst, not always requires to take out polyhydroxycarboxylic acid in the form of a solid, and can treat polyhydroxycarboxylic acid in a higher concentration as compared with the case using chlorinated hydrocarbon as a solvent. Polyhydroxycarboxylic acid obtained by the purification process of the invention can be used for slow release drugs with safety. Polyhydroxycarboxylic acid of the invention has also excellent mechanical properties, heat resistance and weatherability, and thus is stable in a thermoforming stage, can be molded or processed with ease, and can be used for the material of various kinds of films and workpieces.
-
公开(公告)号：EP0476404B1
公开(公告)日：1995-06-21
申请号：EP91114715.5
申请日：1991-09-01
发明人： Nagata, Teruyuki , Watanabe, Katsuji , Kono, Yoshitsugu , Tamaki, Akihiro, Mitsui Toatsu Kosugaya Apt. 2-302 , Kobayashi, Takashi
IPC分类号： C07C209/36 , C07C211/46
CPC分类号： C07C209/36
-
公开(公告)号：EP0292951A2
公开(公告)日：1988-11-30
申请号：EP88108368.7
申请日：1988-05-26
摘要： 2,4-xylenol can be obtained with a high yield and high purity in the purification of a crude 2,4-xylenol isomer mixture containing 2,5-xylenol by reacting only 2,5-xylenol with an aldehyde in the presence of an aromatic sulfonic acid, converting 2,5-xylenol into a xylenol-aldehyde condensate and, subsequently, separating the same from 2,4-xylenol.
摘要翻译： 在纯化含有2,5-二甲苯酚的粗2,4-二甲苯酚异构体混合物时，可以通过仅在2,5-二甲苯酚与醛反应的条件下，在高效液相色谱 将2,5-二甲苯酚转化成二甲酚 - 醛缩合物，随后将其从2,4-二甲苯酚中分离出来。
-
6.发明公开Purification process of polyhydroxycarboxylic acids 失效Reinigungsverfahren vonPolyhydroxycarbonsäure
公开(公告)号：EP0707024A2
公开(公告)日：1996-04-17
申请号：EP95115963.1
申请日：1995-10-10
发明人： Yoshida, Yasunori, 405 Higashi-Totsuka-Ryo. , Watanabe, Katsuji , Obuchi, Shoji , Ohta, Masahiro
CPC分类号： C08G63/90
摘要： The invention relates to a purification process for polyhydroxycarboxylic acids which comprises dissolving a polyhydroxycarboxylic acid in an water-immiscible phenol or an organic solvent containing said water-immiscible phenol, successively bringing the resulting solution into contact with water which contains an acidic material, separating the organic layer from an aqueous layer, and isolating polyhydroxycarboxylic acid from the organic layer; and the process of the invention can efficiently remove a catalyst contained in polyhydroxycarbo xylic acid prepared in the presence of the catalyst, not always requires to take out polyhydroxycarboxylic acid in the form of a solid, and can treat polyhydroxycarboxylic acid in a higher concentration as compared with the case using chlorinated hydrocarbon as a solvent.
Polyhydroxycarboxylic acid obtained by the purification process of the invention can be used for slow release drugs with safety. Polyhydroxycarboxylic acid of the invention has also excellent mechanical properties, heat resistance and weatherability, and thus is stable in a thermoforming stage, can be molded or processed with ease, and can be used for the material of various kinds of films and workpieces.摘要翻译： 本发明涉及多羟基羧酸的纯化方法，其包括将聚羟基羧酸溶解在与水不混溶的苯酚或含有所述水不混溶性苯酚的有机溶剂中，依次将所得溶液与含有酸性物质的水接触， 有机层，从有机层中分离聚羟基羧酸; 本发明方法可以有效地除去在催化剂存在下制备的聚羟基羧甲酸中所含的催化剂，而不一定需要取出固体形式的多羟基羧酸，并且可以比较高浓度的多羟基羧酸 在使用氯化烃作为溶剂的情况下。 通过本发明的纯化方法获得的聚羟基羧酸可以安全地用于缓释药物。 本发明的聚羟基羧酸也具有优异的机械性能，耐热性和耐候性，因此在热成型阶段稳定，可以容易地成型或加工，可用于各种薄膜和工件的材料。
-
公开(公告)号：EP0476404A3
公开(公告)日：1992-06-10
申请号：EP91114715.5
申请日：1991-09-01
发明人： Nagata, Teruyuki , Watanabe, Katsuji , Kono, Yoshitsugu , Tamaki, Akihiro, Mitsui Toatsu Kosugaya Apt. 2-302 , Kobayashi, Takashi
IPC分类号： C07C209/36 , C07C211/46
CPC分类号： C07C209/36
摘要： A process for the continuous preparation of aniline by hydrogenating nitrobenzene with hydrogen is disclosed which comprises the steps of suspending, in an aniline solvent, a catalyst of palladium or palladium-platinum which is deposited on a lipophilic carbon having an oil absorbency of at least 100, and carrying out reaction at a temperature of from 150 to 250°C substantially in the absence of water while aniline and water formed in said reaction are continuously distilled off as vapor from the reaction product, and the concentration of nitrobenzene in the reaction solution is maintained at 0.01% by weight or less, wherein a zinc compound is added to the reaction system as a promotor and carbon monoxide is added to the hydrogen at a concentration of 1 - 500 ppm.
-
8.发明公开Process for preparing high-purity aniline 失效Verfahren zur Herstellung von Anilin von hoher Reinheit。
公开(公告)号：EP0476404A2
公开(公告)日：1992-03-25
申请号：EP91114715.5
申请日：1991-09-01
发明人： Nagata, Teruyuki , Watanabe, Katsuji , Kono, Yoshitsugu , Tamaki, Akihiro, Mitsui Toatsu Kosugaya Apt. 2-302 , Kobayashi, Takashi
IPC分类号： C07C209/36 , C07C211/46
CPC分类号： C07C209/36
摘要： A process for the continuous preparation of aniline by hydrogenating nitrobenzene with hydrogen is disclosed which comprises the steps of suspending, in an aniline solvent, a catalyst of palladium or palladium-platinum which is deposited on a lipophilic carbon having an oil absorbency of at least 100, and carrying out reaction at a temperature of from 150 to 250°C substantially in the absence of water while aniline and water formed in said reaction are continuously distilled off as vapor from the reaction product, and the concentration of nitrobenzene in the reaction solution is maintained at 0.01% by weight or less, wherein a zinc compound is added to the reaction system as a promotor and carbon monoxide is added to the hydrogen at a concentration of 1 - 500 ppm.
摘要翻译： 公开了通过用氢气氢化硝基苯来连续制备苯胺的方法，其包括以下步骤：在苯胺溶剂中悬浮钯或钯 - 铂的催化剂，所述催化剂沉积在吸油性至少为100的亲脂性碳上 并且在150-250℃的温度下基本上不存在水进行反应，同时在所述反应中形成的苯胺和水作为蒸气从反应产物中连续蒸馏出去，反应溶液中硝基苯的浓度为 保持在0.01重量％以下，其中将锌化合物作为起始剂加入到反应体系中，并将一氧化碳以1〜500ppm的浓度加入到氢气中。
-
9.发明公开
公开(公告)号：EP0458006A1
公开(公告)日：1991-11-27
申请号：EP91100621.1
申请日：1991-01-19
IPC分类号： C07C209/36
CPC分类号： C07C209/36
摘要： A process for the continuous preparation of aniline by hydrogenating nitrobenzene is disclosed which comprises the steps of suspending, in an aniline solvent, a catalyst of palladium or palladium-platinum which is deposited on a lipophilic carbon having an oil absorbency of at least 100, adding a zinc compound and an alkali metal carbonate or a zinc compound and an alkali metal bicarbonate as promotors to the reaction system, and carrying out reaction at a temperature of from 150 to 250°C substantially in the absence of water while aniline and water formed in said reaction are continuously distilled off as vapor from the reaction product, and the concentration of nitrobenzene in the reaction solution is maintained at 0.01% by weight or less.
摘要翻译： 公开了通过氢化硝基苯连续制备苯胺的方法，其包括以下步骤：在苯胺溶剂中悬浮沉积在吸油性至少为100的亲脂性碳上的钯或钯 - 铂催化剂，加入 锌化合物和碱金属碳酸盐或锌化合物和碱金属碳酸氢盐作为反应体系的促进剂，并且在150-250℃的温度下基本上不存在水进行反应，同时形成苯胺和水 所述反应作为蒸气从反应产物中连续蒸馏，反应溶液中硝基苯的浓度保持在0.01重量％以下。
-
公开(公告)号：EP0292951A3
公开(公告)日：1990-06-06
申请号：EP88108368.7
申请日：1988-05-26
摘要： 2,4-xylenol can be obtained with a high yield and high purity in the purification of a crude 2,4-xylenol isomer mixture containing 2,5-xylenol by reacting only 2,5-xylenol with an aldehyde in the presence of an aromatic sulfonic acid, converting 2,5-xylenol into a xylenol-aldehyde condensate and, subsequently, separating the same from 2,4-xylenol.
-
-
-
-
-
-
-
-
-
搜索结果
12 条记录 (耗时 0.011 秒)
