-
公开(公告)号：DE3769855D1
公开(公告)日：1991-06-13
申请号：DE3769855
申请日：1987-04-21
Applicant: TOSOH CORP
Inventor： FUKUDA KENICHI , KURAUCHI YASUHIRO , MORI TAKASHI , SUEMATSU TETSUYA
-
公开(公告)号：DE3870754D1
公开(公告)日：1992-06-11
申请号：DE3870754
申请日：1988-08-03
Applicant: TOSOH CORP
Inventor： KURAUCHI YASUHIRO , AKAZAWA MICHIHIRO , HARADA TSUNEO , OYAMA KIYOTAKA , TOKUDA AKIRA
IPC: C07K5/037 , B01D61/00 , B01D61/44 , B01D61/54 , C07K1/00 , C07K1/14 , C07K1/24 , C07K5/06 , C07K5/072 , C07K5/075 , C08J5/22 , C09K5/06 , C25B3/00
Abstract: 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：DE3676672D1
公开(公告)日：1991-02-07
申请号：DE3676672
申请日：1986-10-14
Applicant: TOSOH CORP , SAGAMI CHEM RES
Inventor： KURAUCHI YASUHIRO , SEITA TORU , MATSUI KIYOHIDE , SUGIMOTO KIKUO
-
公开(公告)号：DE3780060T2
公开(公告)日：1993-02-25
申请号：DE3780060
申请日：1987-04-07
Applicant: TOSOH CORP
Inventor： FUKUDA KENICHI , MORI TAKASHI , KURAUCHI YASUHIRO , DOI MASAHARU , SUEMATSU TETSUYA
Abstract: 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: wherein X is F or CF3, 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：DE3780060D1
公开(公告)日：1992-08-06
申请号：DE3780060
申请日：1987-04-07
Applicant: TOSOH CORP
Inventor： FUKUDA KENICHI , MORI TAKASHI , KURAUCHI YASUHIRO , DOI MASAHARU , SUEMATSU TETSUYA
Abstract: 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: wherein X is F or CF3, 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.
-
Patent Agency Ranking
公开(公告)号：AT75765T
公开(公告)日：1992-05-15
申请号：AT88112652
申请日：1988-08-03
Applicant: TOSOH CORP
Inventor： KURAUCHI YASUHIRO , AKAZAWA MICHIHIRO , HARADA TSUNEO , OYAMA KIYOTAKA , TOKUDA AKIRA
IPC: C07K5/037 , B01D61/00 , B01D61/44 , B01D61/54 , C07K1/00 , C07K1/14 , C07K1/24 , C07K5/06 , C07K5/072 , C07K5/075 , C08J5/22 , C09K5/06 , C25B3/00
Abstract: 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：JPS6311683A
公开(公告)日：1988-01-19
申请号：JP15399986
申请日：1986-07-02
Applicant: TOSOH CORP
Inventor： MORI TAKASHI , FUKUDA KENICHI , KURAUCHI YASUHIRO
IPC: C25B1/00
Abstract: PURPOSE:To prevent the leakage of metal ions and to efficiently convert the valence number of the metal ions by dividing an anode chamber and cathode chamber with a fluorine anion exchange membrane consisting of a copolymer having the repeating unit expressed by the general formula and executing an electrolysis. CONSTITUTION:The fluorine anion exchange membrane 2 which consists of the copolymer having the repeating unit expressed by the formula (where, X: F or CF3, l; 0 or 1-5 integer, m; 0 or 1, n 1-5 integer, p, q are positive integers and the ratio p/q; 2-16, Y: quaternary ammonium group) and having the exchange capacity of one layer 3 different from the exchange capacity of the other layer 4 is prepd. An electrolytic cell 1 is divided to the anode chamber 8 and the cathode chamber 7 by said exchange membrane 2. An aq. soln. contg. the metal ions which can have plural oxide states, for example, Pt ions, is supplied into one electrode chamber 7. A voltage is impressed to the cathode 5 and the anode 6 to execute the electrolysis.
-
公开(公告)号：JPS62294192A
公开(公告)日：1987-12-21
申请号：JP13588886
申请日：1986-06-13
Applicant: TOSOH CORP
Inventor： MORI TAKASHI , FUKUDA KENICHI , KURAUCHI YASUHIRO
Abstract: PURPOSE:To efficiently control a change of the valence of metal ions producing plural kinds of oxidized state by dividing a cell into anode ad cathode chambers with a specified anion exchange membrane contg. fluorine and by oxidizing or reducing an aqueous soln. contg. the metal ions. CONSTITUTION:A cell is divided into anode-and cathode-chambers with an anion exchange membrane contg. fluorine made of a copolymer having repeating units represented by formula I (where X is F or CF3, l is 0 or an integer of 1-5, m is 0 or 1, n is an integer of 1-5, each of p and q is a positive number, p/q=2-16 and Y is a quat. ammonium group). The thickness of the anion exchange membrane is about 40-500mum, a reinforcing agent can be introduced into the membrane, and a group contg. the quat. ammonium group Y is represented by formula II (where each of R -R is lower alkyl, R and R may bond to each other to form a tetra-or pentamethylene ring and Z is a halogen anion). Metal ions producing plural kinds of oxidized state are fed to the electrode chambers and electrochemical oxidation or reduction id carried out.
-
公开(公告)号：JPH01123606A
公开(公告)日：1989-05-16
申请号：JP27823787
申请日：1987-11-05
Applicant: TOSOH CORP
Inventor： SATOU KIMIYASU , KURAUCHI YASUHIRO , MIYAKI YOSHIYUKI , AKAZAWA MICHIHIRO
Abstract: PURPOSE:To prevent corrosion of an anode and a cathode by hydrofluoric acid by protecting the electrodes from hydrofluoric acid by a cation-exchange membrane at the time of recovering hydrofluoric acid by electrodialysis. CONSTITUTION:An anion-exchange membrane 8 is placed between the cation- exchange membranes 9, the anode 6 and cathode are arranged on the outside of the cation-exchange membranes 9, and the anode chamber 4, cathode chamber 5, supply liq. chamber 2, and recovered liq. chamber 3 are separated from each other. An aq. sulfuric acid soln. is charged in the anode chamber 4 and cathode chamber 5, an aq. hydrofluoric acid soln. is charged in the recovered liq. chamber 3, the hydrofluoric acid contg. an iron ion and a nickel ion is circulated through the supply liq. chamber 2, and electrodialysis is carried out. Since the electrodes are protected from the hydrofluoric acid by the anion-exchange membrane, the corrosion of the anode as well as of the cathode by the hydrofluoric acid can be prevented, and hydrofluoric acid can be efficiently recovered.
-
公开(公告)号：JPS6440498A
公开(公告)日：1989-02-10
申请号：JP19629687
申请日：1987-08-07
Applicant: TOSOH CORP
Inventor： KURAUCHI YASUHIRO , AKAZAWA MICHIHIRO , HARADA TSUNEO , KOYAMA KIYOTAKA , TOKUDA AKIRA
IPC: C07K5/037 , B01D61/00 , B01D61/44 , B01D61/54 , C07K1/00 , C07K1/14 , C07K1/24 , C07K5/06 , C07K5/072 , C07K5/075 , C08J5/22 , C09K5/06 , C25B3/00
Abstract: PURPOSE:To purify the titled compound in high efficiency, suppressing the decomposition of the compound, by supplying an aqueous solution of a dipeptide ester containing an inorganic acid into a middle chamber of an electrolytic cell partitioned with anion exchange membranes, charging a base and an electrolyte to a cathode chamber and an anode chamber, respectively, and transferring the inorganic acid from the middle chamber to the anode chamber. CONSTITUTION:An aqueous solution of a dipeptide ester (e.g. alpha-aspartyl-L-phenylalanine methyl ester) containing an inorganic acid is supplied to a middle chamber 7 between anion exchange chambers 2, 3 of an electrolytic cell 1 partitioned with plural anion exchange membranes 2, 3. The cathode chamber 8 and the anode chamber 6 are supplied with an aqueous solution containing a basic substance and an aqueous solution of an electrolyte, respectively. A potential is applied between the anode 4 and the cathode 5 to transfer hydroxyl ion from the cathode chamber 8 through the anion exchange membrane 3 into the middle chamber 7 to neutralize the aqueous solution of dipeptide ester containing inorganic acid and, at the same time, the anion of the inorganic acid in the aqueous solution is transferred through the anion exchange membrane 2 into the anode chamber 6 to obtain the objective compound in purified state.
-
-
-
-
-
-
-
-
-
Search Results
22
records
(took 0.044 seconds)
