公开(公告)号：US4944852A

公开(公告)日：1990-07-31

申请号：US228489

申请日：1988-08-05

申请人： Yasuhiro Kurauchi ,  Michihiro Akazawa ,  Tsuneo Harada ,  Kiyotaka Oyama ,  Akira Tokuda

发明人： Yasuhiro Kurauchi ,  Michihiro Akazawa ,  Tsuneo Harada ,  Kiyotaka Oyama ,  Akira Tokuda

IPC分类号： C07K5/037 ,  B01D61/44 ,  B01D61/54 ,  C07K1/14 ,  C07K1/24 ,  C07K5/06 ,  C07K5/072 ,  C07K5/075 ,  C08J5/22 ,  C25B3/00

CPC分类号： C07K5/0613 ,  B01D61/44 ,  C07K1/24 ,  C08J5/2237 ,  C08J2327/12

摘要： A method for purifying a dipeptide ester by electrolysis in an electrolytic cell comprising an anode compartment, a cathode compartment and a central compartment partitioned by anion exchange membranes, which comprises supplying an aqueous dipeptide ester solution containing an inorganic acid to the central compartment defined by said anion exchange membranes, an aqueous solution containing a basic substance or an aqueous electrolyte solution containing a basic substance to the cathode compartment and an aqueous electrolyte solution to the anode compartment, supplying hydroxyl ions from the cathode compartment to the central compartment through the anion exchange membrane to neutralize the aqueous dipeptide ester solution containing the inorganic acid and removing anions of the inorganic acid in the aqueous dipeptide ester solution from the central compartment to the anode compartment through the anion exchange membrane.

公开(公告)号：US4707234A

公开(公告)日：1987-11-17

申请号：US922727

申请日：1986-10-24

申请人： Takashi Mori ,  Kenichi Fukuda ,  Yasuhiro Kurauchi

发明人： Takashi Mori ,  Kenichi Fukuda ,  Yasuhiro Kurauchi

IPC分类号： C08J5/22 ,  C25B1/16 ,  C25B1/22 ,  C25D13/00

CPC分类号： C25B1/16 ,  C08J5/2237 ,  C25B1/22 ,  C08J2327/18

摘要： A method for separating an acid and an alkali from an aqueous solution of a salt by an ion exchange membrane electrolysis wherein anion and cation exchange membranes are used as diaphragms and wherein the acid is formed in an anode compartment, and the alkali is formed in a cathode compartment, characterized in that the cation exchange membrane is a fluorinated cation exchange membrane and the anion exchange membrane is a fluorinated anion exchange membrane with the ion exchange capacity varied from one side to the other side.

摘要翻译： 一种通过离子交换膜电解从盐水溶液中分离酸和碱的方法，其中使用阴离子和阳离子交换膜作为隔膜，并且其中酸形成在阳极室中，碱形成在 阴极室，其特征在于，所述阳离子交换膜为氟化阳离子交换膜，所述阴离子交换膜为离子交换容量从一侧向另一侧变化的氟化阴离子交换膜。

公开(公告)号：US4765905A

公开(公告)日：1988-08-23

申请号：US928036

申请日：1986-11-07

申请人： Sakae Kitamura ,  Yasuhiro Kurauchi ,  Toru Seita

发明人： Sakae Kitamura ,  Yasuhiro Kurauchi ,  Toru Seita

IPC分类号： C02F1/42 ,  B01D69/02 ,  C08J5/22 ,  B01D13/00

CPC分类号： C08J5/2237 ,  B01D61/243 ,  B01D2325/16 ,  C08J2327/18

摘要： A method for recovering acids from an aqueous solution of a mixture of the acids and metal salts by dialysis, characterized in that a fluorinated anion exchange membrane made of a copolymer having repeating units of the formula: ##STR1## wherein X is F or CF.sub.3, l is an integer of from 0 to 5, m is 0 or 1, n is an integer of from 1 to 5, p/q is from 2 to 16, and Y is a quaternary ammonium group, is used as a dialysis membrane.

摘要翻译： 一种通过透析从酸和金属盐的混合物的水溶液中回收酸的方法，其特征在于由具有下式的重复单元的共聚物制成的氟化阴离子交换膜：其中X为F 或CF 3，l为0〜5的整数，m为0或1，n为1〜5的整数，p / q为2〜16，Y为季铵基，作为 透析膜。

公开(公告)号：US4877498A

公开(公告)日：1989-10-31

申请号：US198663

申请日：1988-05-23

申请人： Kenichi Fukuda ,  Takashi Mori ,  Yasuhiro Kurauchi ,  Masaharu Doi ,  Tetsuya Suematsu

发明人： Kenichi Fukuda ,  Takashi Mori ,  Yasuhiro Kurauchi ,  Masaharu Doi ,  Tetsuya Suematsu

IPC分类号： C08J5/22 ,  C25B1/00

CPC分类号： C08J5/2237 ,  C25B1/00 ,  C08J2327/12

摘要： A method for producing a metal salt by electrolysis in an electrolytic cell comprising an anode compartment and a cathode compartment partitioned by a diaphragm, disposing in the anode compartment a metal anode soluble in the aqueous solution, and conducting electrolysis to dissolve the metal anode, wherein the diaphragm is a fluorinated anion exchange membrane made of a copolymer having repeating units of the formula: ##STR1## wherein X is F or CF.sub.3, l is an integer of from 0 to 5, m is 0 or 1, n is an integer of 1 to 5, each of p and q is a positive number and the ratio of p/q is from 2 to 16, and Y is a group involving a quaternary ammonium group.

公开(公告)号：US4909913A

公开(公告)日：1990-03-20

申请号：US235796

申请日：1988-08-23

申请人： Kenichi Fukuda ,  Takashi Mori ,  Yasuhiro Kurauchi ,  Tetsuya Suematsu

发明人： Kenichi Fukuda ,  Takashi Mori ,  Yasuhiro Kurauchi ,  Tetsuya Suematsu

IPC分类号： C08J5/22 ,  C25C1/00 ,  C25C1/20

CPC分类号： C08J5/2237 ,  C25C1/00 ,  C25C1/20 ,  C08J2327/12

摘要： A method for producing a metal salt by electrolysis in an electrolytic cell comprising an anode compartment and a cathode compartment partitioned by a diaphragm, characterized by supplying to the cathode compartment an aqueous solution of a water-soluble metal compound, and electrolytically reducing metal ions or metal complex ions to electroplate the metal on a cathode, wherein the diaphragm is a fluorinated anion exchange membrane made of a copolymer having repeating units of the formula: ##STR1## wherein X is F or CF.sub.3, l is an integer of from 0 to 5, m is 0, or 1, n is an integer of 1 to 5, each of p and q is a positive number and the ratio of p/q is from 2 to 16, and Y is a group involving a quaternary ammonium group.

公开(公告)号：US4900420A

公开(公告)日：1990-02-13

申请号：US177844

申请日：1988-03-28

申请人： Yasuhiro Kurauchi ,  Toru Seita ,  Kiyohide Matsui ,  Kikuo Sugimoto

发明人： Yasuhiro Kurauchi ,  Toru Seita ,  Kiyohide Matsui ,  Kikuo Sugimoto

IPC分类号： C08J5/22

CPC分类号： C08J5/2237 ,  C08J2327/12

摘要： A process for preparing an anion exchange membrane, which comprises subjecting a carboxylate membrane made of a copolymer having repeating units of the formula: ##STR1## wherein X is F or CF.sub.3, l is an integer of from 0 to 5, m is 0 or 1, n is an integer of from 1 to 5, and p/q is from 4 to 16, and R is an alkyl group, to an acid or base treatment, and then introducing anion exchange groups thereinto.

摘要翻译： 一种制备阴离子交换膜的方法，包括使由具有下式的重复单元的共聚物制成的羧酸盐膜：其中X为F或CF 3，I为0至5的整数，m为0或 1，n为1〜5的整数，p / q为4〜16，R为烷基，进行酸或碱处理，然后向其中引入阴离子交换基团。