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41. 发明专利

JPH07506149A 失效
公开(公告)号：JPH07506149A
公开(公告)日：1995-07-06
申请号：JP51822494
申请日：1994-02-03
IPC分类号： C01D7/00 , C01D7/07 , C01D7/18 , C25B1/14

42. 发明专利

JPH07501782A 失效
公开(公告)号：JPH07501782A
公开(公告)日：1995-02-23
申请号：JP51020892
申请日：1992-11-23
IPC分类号： C01B31/02 , C25B1/00 , C25B1/14 , C25B3/00 , H01M4/58 , H01M4/583 , H01M4/587

43. 发明专利

JPH05339771A 失效
公开(公告)号：JPH05339771A
公开(公告)日：1993-12-21
申请号：JP19498191
申请日：1991-07-10
申请人： TOSOH CORP
发明人： SAKAMOTO KENJI , SUEMATSU TETSUYA , MORI TAKASHI
IPC分类号： C08J5/22 , C25B1/14 , C25B9/00 , C25B9/08 , C25B13/02 , C25B13/08
摘要： PURPOSE:To exhibit high current efficiency in a wide salt and hydrogen conc. range by coupling a water permeable layer having lower permeability than a fluorine containing cation exchange resin with the anodic side of the fluorine containing cation exchange membrane. CONSTITUTION:The water permeable layer is coupled with the anodic side of the fluorine containing cation exchange membrane. The water permeable layer has lower water permeability than that of the fluorine containing cation exchange membrane. Thus, the diaphragm for electrolyzing sodium chloride is formed. For example, sodium electroconductive solid electrolyte, porous fluorocarbon resin, etc., is applicable as the water permeable layer. Thus, the electrolysis voltage is stably kept for a long period.

44. 发明专利

JPH05506481A 失效
公开(公告)号：JPH05506481A
公开(公告)日：1993-09-22
申请号：JP50905891
申请日：1991-05-23
IPC分类号： C25B1/24 , B01D61/44 , C01B20060101 , C01B11/02 , C25B1/10 , C25B1/14 , C25B1/16 , C25B1/22 , C25B1/26 , C25B5/00 , C25B9/00 , C25B9/08 , C25B9/18 , C25B15/08 , H01M8/0656
摘要： The formation of sodium sulfate by-product in sulfuric acid-based chlorine dioxide generating processes is decreased and preferably eliminated entirely, by effecting electrochemical treatment of sodium ion-containing feed materials for the generator to remove sodium ions and to add hydrogen ions. Sodium hydroxide may be produced as a by-product. The process is generally applicable to the electrochemical treatment of alkali metal chlorates, alkali metal sulfates and mixtures thereof to produce acidified solutions useful in providing chlorate ion-containing feeds to such chlorine dioxide generating processes or for other purposes.

45. 发明专利

JPH0416285A ELECTROLYTIC OXIDATION OF AQUEOUS THIOSULFURIC ACID SOLUTION 失效
公开(公告)号：JPH0416285A
公开(公告)日：1992-01-21
申请号：JP11665090
申请日：1990-05-02
申请人： KONISHIROKU PHOTO IND
发明人： GOSHIMA NOBUTAKA , KAJIYA TAKESHI
IPC分类号： C02F1/461 , C25B1/14 , C25B1/22
摘要： PURPOSE:To discharge a waste photographic processing solution to rivers by electrolytically treating an aqueous solution containing a thiosulfate ion in a three-dimensional electrode electrolytic cell and oxidizing the thiosulfate ion to a high order sulfur oxide ion. CONSTITUTION:An aqueous thiosulfuric acid solution is supplied to a three-dimensional electrode-electrolytic cell 2 to be subjected to oxidation treatment. The flow rate of the aqueous thiosulfuric acid solution supplied to the electrolytic cell 2 may be to prescribed so that the aqueous solution efficiently comes into contact with the surfaces of electrodes to oxidize a thiosulfate ion and, when the aqueous solution flows in a perfectly lamina state, the movement of the aqueous solution to a lateral direction is reduced and the contact with the electrodes, dielectrics and the surfaces of fine particles is reduced and, therefore, a turblent flow state is pref. formed. Further, the electrode potential at this time is pref. set to -0.1-1.0vs. SHE in anode potential. The thiosulfate ion is almost selectively oxidized to a polythosulfate ion within this potential range and can be subjected to oxidative decomposition without precipitating sulfur. By this method, a waste photographic processing solution can be discharged to rivers.

46. 发明专利

JPS6240432B2 失效
公开(公告)号：JPS6240432B2
公开(公告)日：1987-08-28
申请号：JP16529879
申请日：1979-12-19
申请人： KUREHA CHEMICAL IND CO LTD
发明人： MORITA TOMIJIRO , ENOKI TOMOO , YOSHIMORI MINORU
IPC分类号： C25B1/14

47. 发明专利

JPS60106985A MANUFACTURE OF ALKALI METAL SILICATE 失效
公开(公告)号：JPS60106985A
公开(公告)日：1985-06-12
申请号：JP20031384
申请日：1984-09-25
申请人： ICI LTD
发明人： GURAHAMU UIRUFURETSUDO SUKOTSU , JIEEMUZU HIYUU SUTEIIBUN
IPC分类号： C25B1/14 , C01B33/32 , C25B1/00 , C25B7/00

48. 发明专利

JPS6063336A SURFACE-ACTIVATED AMORPHOUS ALLOY FOR ELECTRODE FOR ELECTROLYZING SOLUTION 失效
公开(公告)号：JPS6063336A
公开(公告)日：1985-04-11
申请号：JP17116283
申请日：1983-09-19
申请人： DAIKI ENGINEERING CO , HASHIMOTO KOUJI
发明人： HASHIMOTO KOUJI , KUMAGAI NAOKAZU , KAWASHIMA ASAHI , ASAMI KATSUHIKO , MASUMOTO TAKESHI
IPC分类号： C25B11/08 , C22C5/04 , C22C45/00 , C25B1/14 , C25B11/04 , C25B11/10 , H01M4/38 , H01M4/86 , H01M4/92
摘要： PURPOSE:To provide a titled alloy which produces efficiently sodium hypochlorite by electrolyzing a dilute aq. NaCl soln. and is provided with substantial corrosion resistance in the stage of electrolysis by consisting the alloy of specifically composed P, Si, Ru, Rh, Ir, Pt and Pd, etc. CONSTITUTION:A surface-activated amorphous alloy for an electrode for electrolyzing soln. contains 10-30atom% P and/or Si, contains 20-50%>=1 kind among Ru, Rh, Ir, Pt and contains further

49. 发明专利

JPS578192B2 JPS578192B2 - 失效
公开(公告)号：JPS578192B2
公开(公告)日：1982-02-15
申请号：JP12207478
申请日：1978-10-05
IPC分类号： C25B11/02 , C25B1/14 , C25B1/26 , C25B9/00

50. 发明专利

JPS5550469A PRODUCTION OF NITRITE 失效
公开(公告)号：JPS5550469A
公开(公告)日：1980-04-12
申请号：JP12273678
申请日：1978-10-06
申请人： ASAHI CHEMICAL IND
发明人： YOSHIDA MITSUO
IPC分类号： C25B1/00 , C25B1/14
摘要： PURPOSE:To suppress the formation of cathode by-products such as NOx and H2 and obtain nitrite at high current efficiency by supplying the aqueous solution of nitrate such as NaNO3 to the cathode chamber of the electrolytic cell segmented by a cation exchange membrane of fluoride polymer base and supplying current while specifying the pH of this aqueous solution. CONSTITUTION:Mixed solution of nitrate solution 21 such as NaNO3 and nitric acid 22 is supplied from a catholyte tank 30 to the cathode chakber 28 of an electrolytic cell 26 which has been segmented by a cation exchange membrane 27 such as of fluoride polymer base having sulfonic acid groups. On the other hand, water 25 is supplied from anolyte tank 31 to the anode chamber 29. Next, the nitrate solution is electrolytically reduced under the following conditions by usikg the anode having covering of one or more kinds of Pt group metals and the cathode composed of Hg, Cd, Zn, Pb or their alloys. Namely, the pH of the nitrate solution is maintained at 4 or over, suitably at 7 or over and yet the solution temperature of the cathode chamber is kept at 95 deg.C or under, preferably room temperature to 70 deg.C.

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