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1. 发明授权

US3905879A Electrolytic manufacture of dithionites 失效
标题翻译：连二电极的电解制造
公开(公告)号：US3905879A
公开(公告)日：1975-09-16
申请号：US41161373
申请日：1973-11-01
申请人： HOOKER CHEMICALS PLASTICS CORP
发明人： ENG JEFFREY D , HARKE CYRIL J
IPC分类号： C25B1/14 , C25B1/46 , C01B7/06 , C01B17/66 , C01D1/06
CPC分类号： C25B1/46 , C25B1/14
摘要： Dithionites are made by a process which begins with the production of high concentration, chloride-free sodium hydroxide solution and chlorine at a high current efficiency from a threecompartment electrolytic cell having membranes of a cation-active permselective membrane material separating anode and cathode compartments from a buffer compartment. Hydroxide ions migrating into the buffer compartment from the cathode compartment are converted to sulfite by reaction with sulfur dioxide, improving the current efficiency of the three-compartment cell, and the sulfite is removed. Subsequently, the sulfite resulting and additional sulfur dioxide are fed to the cathode compartment of a two-compartment electrolytic cell wherein the anode and cathode compartments are separated by a cation-active permselective membrane and in which chloride solution is being electrolyzed to chlorine at the anode and sulfite solution is being electrolyzed to dithionite at the cathode.
摘要翻译：连二亚硫酸盐通过一种方法制备，该方法开始于以高电流效率生产高浓度，无氯化氢的氢氧化钠溶液和氯，该电解槽具有分离阳极和阴极室的阳离子活性渗透选择膜材料膜的三室电解槽从缓冲室。通过与二氧化硫的反应将从阴极室迁移到缓冲室中的氢氧化物离子转化为亚硫酸盐，提高三室电池的电流效率，并除去亚硫酸盐。随后，将产生的亚硫酸盐和另外的二氧化硫进料到两室电解池的阴极室中，其中阳极和阴极室由阳离子活性渗透选择膜分离，其中氯化物溶液在阳极被电解为氯亚硫酸盐溶液在阴极被电解为连二亚硫酸盐。

2. 发明授权

US3904495A Electrolytic-electrodialytic and chemical manufacture of chlorine dioxide, chlorine and chloride-free alkali metal hydroxide 失效
标题翻译：二氧化氯，氯和无氯碱金属氢氧化物的电解 - 电渗析和化学制造
公开(公告)号：US3904495A
公开(公告)日：1975-09-09
申请号：US43000574
申请日：1974-01-02
申请人： HOOKER CHEMICALS PLASTICS CORP
发明人： ENG JEFFREY D , HARKE CYRIL J
IPC分类号： C25B1/46 , B01D61/44 , B01D61/48 , B01D61/50 , B01D61/54 , C01B11/02 , C01D5/02 , C08J5/22 , C25B1/34 , C01B17/96 , C01B7/06 , C01D1/06
CPC分类号： C25B1/34 , B01D61/44
摘要： Chlorine dioxide, chlorine, alkali metal hydroxide, alkali metal sulfate and hydrogen are made from alkali metal chloride, alkali metal chlorate, hydrogen chloride, sulfuric acid and water in an electrolytic-electrodialytic cell containing at least seven compartments and having alternating anion-active and cationactive permselective membranes separating the compartments. By feeding particular reactants or mixtures thereof to certain compartments from which component ions selectively diffuse to other compartments under influence of the applied voltage, reactions take place in the compartments, selectively yielding chlorine dioxide and chlorine mixtures, alkali metal sulfate, hydrogen, substantially chloride-free alkali metal hydroxide, spent sulfuric acid from a different compartment than that of the alkali metal sulfate and spent alkali metal chloride and chlorate mixtures. The process is particularly useful in producing chlorine and chlorine dioxide for woodpulp bleaching and in producing alkali metal sulfate free of sulfuric acid, for processes utilizing such sulfate.
摘要翻译：二氧化氯，氯，碱金属氢氧化物，碱金属硫酸盐和氢气由含有至少七个隔室并具有交替阴离子活性的电解电解池中的碱金属氯化物，碱金属氯酸盐，氯化氢，硫酸和水制成，分离隔室的阳离子活性渗透选择性膜。通过将特定的反应物或其混合物送入特定的隔室，其中组分离子在施加电压的影响下选择性地扩散到其它隔室，反应发生在隔室中，选择性地产生二氧化氯和氯混合物，碱金属硫酸盐，氢，游离碱金属氢氧化物，废硫酸与不同的隔室比碱金属硫酸盐和废碱金属氯化物和氯酸盐混合物。

3. 发明授权

US3884778A Electrolytic production of hydrogen peroxide and alkali metal hydroxide 失效
标题翻译：过氧化氢和碱金属氢氧化物的电解生产
公开(公告)号：US3884778A
公开(公告)日：1975-05-20
申请号：US43000474
申请日：1974-01-02
申请人： HOOKER CHEMICALS PLASTICS CORP
发明人： ENG JEFFREY D , HARKE CYRIL J
IPC分类号： C25B1/28 , C25B1/46 , C01B11/02 , B01K3/00 , C01D1/06
CPC分类号： C25B1/285 , C25B1/46
摘要： Hydrogen peroxide is made electrolytically in a threecompartment cell having an anion-active permselective membrane separating anode and buffer compartments and a cation-active permselective membrane separating the buffer compartment and cathode compartment, by feeding sulfuric acid to the anode compartment, alkali metal sulfate to the buffer compartment and water to the cathode compartment and withdrawing substantially sulfate-free alkali metal hydroxide solution from the cathode compartment and persulfuric acid from the anode compartment, after which the persulfuric acid is hydrolyzed to produce hydrogen peroxide and sulfuric acid. The process is particularly useful for supplying hydrogen peroxide for use in wood pulping or pulp bleaching processes, especially in conjunction with chlorine dioxide bleaching, because alkali metal sulfate resulting from chlorine dioxide manufacture can be used as a reactant in the present process, a portion of the sulfuric acid produced in the present process may be used in the manufacture of chlorine dioxide, and the alkali metal hydroxide produced by the present process is also useful in pulping wood.

4. 发明授权

US3884777A Electrolytic process for manufacturing chlorine dioxide, hydrogen peroxide, chlorine, alkali metal hydroxide and hydrogen 失效
标题翻译：用于制造二氧化氯，过氧化氢，氯仿，碱金属氢氧化物和氢的电解方法
公开(公告)号：US3884777A
公开(公告)日：1975-05-20
申请号：US42999874
申请日：1974-01-02
申请人： HOOKER CHEMICALS PLASTICS CORP
发明人： HARKE CYRIL J , ENG JEFFREY D
IPC分类号： B01D61/44 , B01D61/48 , B01D61/50 , B01D61/54 , C01B15/03 , C08J5/22 , C25B1/26 , C25B1/28 , C25B1/46 , C01B11/02 , B01K3/00 , C01D1/06
CPC分类号： C25B1/28 , C25B1/26 , C25B1/285 , C25B1/46
摘要： Chlorine dioxide, hydrogen peroxide, chlorine, alkali metal hydroxide and hydrogen are produced from alkali metal chloride, alkali metal chlorate, sulfuric acid and water, utilizing an electrolytic cell having anode and cathode compartments separated by two intermediate buffer compartments, the boundaries between the anode and cathode compartments and the buffer compartments being of cation-active permselective membranes which are resistant to attack by the medium and the buffer compartments being separated by a suitable anion-active permselective membrane. On electrolysis, with sulfuric acid fed to the anode compartment, chloride and chlorate fed to the buffer compartment adjacent to the cathode compartment and water fed to the cathode compartment there are produced hydrogen and alkali metal hydroxide in the cathode compartment, chlorine dioxide and chlorine in the buffer compartment adjacent to the anode compartment and persulfuric acid in the anode compartment. The persulfuric acid is hydrolyzed to produce hydrogen peroxide. Hydrogen peroxide, alkali metal hydroxide, chlorine and chlorine dioxide are useful pulp mill chemicals especially suited for pulping wood and bleaching wood pulp.

5. 发明授权

US3925174A Electrolytic method for the manufacture of hypochlorites 失效
标题翻译：用于制造HYPOCHLITEITE的电解方法
公开(公告)号：US3925174A
公开(公告)日：1975-12-09
申请号：US41162073
申请日：1973-11-01
申请人： HOOKER CHEMICALS PLASTICS CORP
发明人： ENG JEFFREY D , HARKE CYRIL J
IPC分类号： C25B1/46 , B01D61/00 , B01D61/44 , B01D65/00 , C25B1/26 , C25B13/04 , B01K1/00 , C01B11/06 , C25B13/08
CPC分类号： C25B1/26 , C25B13/04
摘要： Hypochlorites, such as alkali metal hypochlorites, are made by electrolyzing brine in a cell having three or more compartments or zones therein, wherein anode and cathode compartments are separated from at least one intervening buffer compartment by cation-active permselective membranes of a hydrolyzed copolymer of tetrafluoroethylene and a fluorosulfonated perfluorovinyl ether or of a sulfostyrenated fluorinated ethylene propylene polymer or by such a permselective membrane on the cathode side plus a porous asbestos diaphragm, while feeding chlorine gas to the buffer zone at such a rate and under such conditions as to produce hypochlorite therein. The hypochlorite may be converted to chlorate externally of the cell or, in a variation of the process, may be converted to chlorate in the buffer compartment.

6. 发明授权

US3904496A Electrolytic production of chlorine dioxide, chlorine, alkali metal hydroxide and hydrogen 失效
标题翻译：二氧化氯，氯，碱金属氢氧化物和氢气的电解生产
公开(公告)号：US3904496A
公开(公告)日：1975-09-09
申请号：US42999774
申请日：1974-01-02
申请人： HOOKER CHEMICALS PLASTICS CORP
发明人： HARKE CYRIL J , ENG JEFFREY D
IPC分类号： C25B1/46 , B01D61/44 , B01D61/50 , B01D61/54 , C08J5/22 , C25B1/34 , C25B13/08 , C01D1/06 , C01B7/06
CPC分类号： C25B1/34
摘要： Chlorine dioxide, chlorine, alkali metal hydroxide and hydrogen are produced from hydrogen chloride, alkali metal chlorate, alkali metal chloride and water in a three compartment electrolytic cell in which a buffer compartment between the anode and cathode compartments is separated from the anode compartment by an anion-active permselective membrane and from the cathode compartment by a cation-active permselective membrane. Hydrogen chloride is fed to the anode compartment, aqueous alkali metal chlorate and chloride are fed to the buffer compartment and water is fed to the cathode compartment, with chlorine dioxide and chlorine being taken off from the anode compartment while hydrogen and alkali metal hydroxide substantially free of alkali metal chloride are produced in and removed from the cathode compartment. The products of the process are obtained in a single vessel in forms suitable for use in pulping wood and bleaching wood pulp without production of undesirable byproducts that create disposal problems or require further processing for conversion to useful products.
摘要翻译：二氯二氧化物，氯气，碱金属氢氧化物和氢气由氯化氢，碱金属氯化物，碱金属氯化物和水在三室电解池中产生，其中阳极室和阴极室之间的缓冲室与阳极室分离，阴离子活性渗透选择膜和阳离子活性渗透选择膜。将氯化氢加入到阳极室中，将碱金属氯酸盐和氯化钠水溶液加入到缓冲室中，并将水送入阴极室，二氧化氯和氯从阳极室取出，而氢和碱金属氢氧化物基本上释放的碱金属氯化物在阴极室中产生并从阴极室排出。

7. 发明专利

BR8108390A 未知
公开(公告)号：BR8108390A
公开(公告)日：1982-09-21
申请号：BR8108390
申请日：1981-12-23
申请人： HOOKER CHEMICALS PLASTICS CORP
发明人： ENG JEFFREY D , HARKE CYRIL J , TSUJIHIKO FUKUNAGA , SCHURING HELMUTH , MOSE LUCIANO
IPC分类号： C25B9/20 , C25B11/10 , C25B1/26 , C25B1/08
摘要： A filter press type electrolytic cell for the electrolysis of brine to produce chlorine and caustic includes a plurality of rectangular frames having U-shaped or channel-shaped walls, the open sides of each of which wall members face inwardly, and a downcomer tube in each frame for conducting product from near the top of the frame to the bottom thereof for withdrawal. The downcomer tubes are located near a framing side but are not within a framing channel. The openings of the framing walls are partially covered by cross members of the same material as the framing to improve the resistance thereof to distortion during closing of the cell. Utilization of the downcomer tubes, preferably of polytetrafluoroethylene for the catholyte compartment and titanium or titanium clad material for the anolyte compartment, allows the maintaining of the framing channel open so that inner walls thereof are electrolytically protected against corrosion. Otherwise, when enclosed or tubular framing members are employed inner wall portions thereof can become corroded after relatively short periods of use. The invention also relates to frames for use in filter press type electrolytic cells and to a method of electrolyzing, wherein such frames and cells may be employed.

8. 发明专利

FI60577C 未知
公开(公告)号：FI60577C
公开(公告)日：1982-02-10
申请号：FI752923
申请日：1975-10-20
申请人： HOOKER CHEMICALS PLASTICS CORP
发明人： ENG JEFFREY D
IPC分类号： C25B1/46 , C25B13/00 , C25B15/00

9. 发明专利

CA1068640A ELECTROLYTIC PRODUCTION OF HYDROGEN PEROXIDE AND ALKALI METAL HYDROXIDE 未知
公开(公告)号：CA1068640A
公开(公告)日：1979-12-25
申请号：CA217218
申请日：1974-12-31
申请人： HOOKER CHEMICALS PLASTICS CORP
发明人： HARKE CYRIL J , ENG JEFFREY D
IPC分类号： C25B1/28 , C25B1/46 , C25B1/00
摘要： Hydrogen peroxide is made electrolytically in a threecompartment cell having an anion-active permselective membrane separating anode and buffer compartments and a cation-active permselective membrane separating the buffer compartment and cathode compartment, by feeding sulfuric acid to the anode compartment, alkali metal sulfate to the buffer compartment and water to the cathode compartment and withdrawing substantially sulfate-free alkali metal hydroxide solution from the cathode compartment and persulfuric acid from the anode compartment, after which the persulfuric acid is hydrolyzed to produce hydrogen peroxide and sulfuric acid. The process is particularly useful for supplying hydrogen peroxide for use in wood pulping or pulp bleaching processes, especially in conjunction with chlorine dioxide bleaching, because alkali metal sulfate resulting from chlorine dioxide manufacture can be used as a reactant in the present process, a portion of the sulfuric acid produced in the present process may be used in the manufacture of chlorine dioxide, and the alkali metal hydroxide produced by the present process is also useful in pulping wood.

10. 发明专利

CA1066222A ELECTROLYTIC CELL INCLUDING BUFFER, SULPHATE, ACID, AND CHLORINE IDE COMPARTMENTS 未知
公开(公告)号：CA1066222A
公开(公告)日：1979-11-13
申请号：CA216849
申请日：1974-12-20
申请人： HOOKER CHEMICALS PLASTICS CORP
发明人： ENG JEFFREY D , HARKE CYRIL J
IPC分类号： C25B1/46 , B01D61/44 , B01D61/48 , B01D61/50 , B01D61/54 , C01B11/02 , C01D5/02 , C08J5/22 , C25B1/34 , C25B1/00 , C25B9/00
摘要： Chlorine dioxide, chlorine, alkali metal hydroxide, alkali metal sulfate and hydrogen are made from alkali metal chloride, alkali metal chlorate, hydrogen chloride, sulfuric acid and water in an electrolytic-electrodialytic cell containing at least seven compartments and having alternating anionactive and cation-active permselective membranes separating the compartments. By feeding particular reactants or mixtures thereof to certain compartments from which component ions selectively diffuse to other compartments under influence of the applied voltage, reactions take place in the compartments. selectively yielding chlorine dioxide and chlorine mixtures, alkali metal sulfate, hydrogen, substantially chloride-free alkali metal hydroxide. spent sulfuric acid from a different compartment from that of the alkali metal sulfate and spent alkali metal chloride and chlorate mixtures. The process is particularly useful in producing chlorine and chlorine dioxide for woodpulp bleaching and in producing alkali metal sulfate free of sulfuric acid, for processes utilizing such sulfate.

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