公开(公告)号：US4239741A

公开(公告)日：1980-12-16

申请号：US955166

申请日：1978-10-27

申请人： Tomiya Isshiki ,  Tetsuo Tomita ,  Toshiaki Kozaki ,  Osamu Aoki ,  Mitsuo Abe ,  Norio Takeda ,  Mitsuo Miura ,  Yoshiyuki Aoki ,  Takao Kondo ,  Kaoru Tsuyuki

发明人： Tomiya Isshiki ,  Tetsuo Tomita ,  Toshiaki Kozaki ,  Osamu Aoki ,  Mitsuo Abe ,  Norio Takeda ,  Mitsuo Miura ,  Yoshiyuki Aoki ,  Takao Kondo ,  Kaoru Tsuyuki

IPC分类号： C01B21/16 ,  C01B21/54

CPC分类号： C01B21/16

摘要： Hydrazine sulfate having a relatively large particle diameter and a high purity is produced by hydrolysis of benzophenoneazines by sulfuric acid having a concentration of 75% by weight or less in an amount of 1.1 times by mole or more the stoichiometric amount in a very high conversion and a high yield with less operational loss.

摘要翻译： 通过以非常高的转化率使化学计量量为1.1倍摩尔以上的浓度为75重量％以下的硫酸水解二苯甲酮酮而产生具有较大粒径且高纯度的硫酸肼， 产量高，运营损失少。

公开(公告)号：US6111097A

公开(公告)日：2000-08-29

申请号：US325878

申请日：1999-06-04

申请人： Hiromitsu Nagashima ,  Hisashi Sakaitani ,  Hidechika Wakabayashi ,  Toshiaki Kozaki

发明人： Hiromitsu Nagashima ,  Hisashi Sakaitani ,  Hidechika Wakabayashi ,  Toshiaki Kozaki

IPC分类号： C08B15/04 ,  C08B31/18 ,  C08B37/02

CPC分类号： C08B31/18 ,  C08B15/04

摘要： In a process of producing a carboxypolysaccharide by oxidizing a polysaccharide in the presence of a ruthenium compound and an oxidizing agent, the expensive ruthenium is easily and efficiently recovered. Ruthenium dissolved in a reaction mixture after the oxidation of the polysaccharide is converted, after or without being subjected to a heat. treatment, to high oxidation sate, which is then recovered by the extraction with a water-insoluble organic solvent. The recovered ruthenium is reduced to low oxidation state and reused in a subsequent production of the carboxypolysaccharide.

摘要翻译： 在通过在钌化合物和氧化剂的存在下氧化多糖来生产羧基多糖的方法中，昂贵的钌容易且有效地回收。 在多糖氧化后溶解在反应混合物中的钌在经受或不经受热量之后被转化。 处理到高氧化物，然后通过用水不溶性有机溶剂萃取回收。 回收的钌还原成低氧化状态，并在随后的羧基多糖的生产中重复使用。

公开(公告)号：US6130328A

公开(公告)日：2000-10-10

申请号：US186465

申请日：1998-11-05

申请人： Masafumi Shimpo ,  Hisashi Sakaitani ,  Hidechika Wakabayashi ,  Toshiaki Kozaki

发明人： Masafumi Shimpo ,  Hisashi Sakaitani ,  Hidechika Wakabayashi ,  Toshiaki Kozaki

IPC分类号： C08B15/02 ,  C08B31/18 ,  C08B37/00 ,  C07C333/00 ,  C08B33/08 ,  C08B35/08

CPC分类号： C08B37/0045 ,  C08B15/02 ,  C08B31/18

摘要： There is herein disclosed a process for preparing a carboxypolysaccharide by oxidizing a polysaccharide with a combination of a transition metal compound and an oxidizing agent, said process comprising the step of separating the transition metal from a reaction mixture with a chelating agent. According to the present invention, the transition metal can be removed to a low concentration of less than 100 ppm from an aqueous solution including the transition metal and the tricarboxypolysaccharide. The process of the present invention is important to reduce the loss of a transition metal catalyst such as the ruthenium catalyst and to industrially manufacture a purified tricarboxypolysaccharide.

摘要翻译： 本文公开了通过用过渡金属化合物和氧化剂的组合氧化多糖来制备羧基多糖的方法，所述方法包括用螯合剂从反应混合物中分离过渡金属的步骤。 根据本发明，可以从包含过渡金属和三羧基多糖的水溶液中除去过渡金属至低于100ppm的低浓度。 本发明的方法对于减少诸如钌催化剂的过渡金属催化剂的损失以及在工业上制造纯化的三羧基多糖是重要的。