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公开(公告)号：US3684668A
公开(公告)日：1972-08-15
申请号：US3684668D
申请日：1970-10-19
申请人： BASF AG
发明人： NOHE HEINZ , SUTER HUBERT
CPC分类号： C25B3/04
摘要： MANUFACTURE OF HEXADIENE-DIOLIC ACIDS BY THE ELECTROCHEMICAL REDUCTION OF BENZENE-DIOIC ACIDS IN AN ELECTROLYTIC CELL CONTAINING DIAPHRAGMS, USING A CATHOLYTE CONTAINING THE DIOIC ACID, WATER AND A WATER-SOLUBLE ORGANIC SOLVENT, WHEREIN THE FLOW OF ELECTROLYSIS CURRENT IS PERIODICALLY INTERRUPTED AND THE CELL SHORT-CIRCUITED.
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公开(公告)号：US3779876A
公开(公告)日：1973-12-18
申请号：US3779876D
申请日：1972-08-18
申请人： RHONE POULENC SA
发明人： MICHELET D
CPC分类号： C25B3/04
摘要： Glyoxylic acid is prepared by a process facilitating recovery of glyoxylic acid, the process being electrolytic reduction of oxalic acid in an electrolysis cell in which A. THE CATHODE IS SOLID AND METALLIC WITH A HYDROGEN OVERVOLTAGE WHICH IS GREATER THAN THE POTENTIAL FOR THE REDUCTION OF OXALIC ACID TO GLYOXYLIC ACID, B. THE SEPARATING DIAPHRAGM IS A CATION EXCHANGE MEMBRANE, C. THE CATHOLYTE COMPRISES AN AQUEOUS SOLUTION OF OXALIC ACID WHICH IS FREE OF A STRONG INORGANIC ACID, D. THE CATHOLYTE MOVING IN A CLOSED PATH BY BEING PASSED INTO THE CATHODE COMPARTMENT, OVER THE SURFACE OF THE CATHODE, BEING REMOVED FROM THERE AND BEING RETURNED TO THE CATHODE COMPARTMENT, AND E. THE TEMPERATURE OF THE CATHOLYTE IS BETWEEN 0* AND 70*C.
摘要翻译： 乙醛酸通过促进乙醛酸回收的方法制备，该方法是电解槽中电解电解中草酸的电解还原，其中A.阴离子固体和金属具有比用于还原氧化物的潜力大的氢过氧化物 酸性羧酸，B.分离膜是一种交换膜，C.COLHOLYTE包含无酸性的酸性水溶液，不含强力无机酸，D.通过被引入到封闭途径中的CATHOLYTE移动到封闭的路径 阴凉室，阴凉处的表面，从其中取出并返回到阴凉室，E。CATHOLYTE的温度在0°和70°C之间。
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公开(公告)号：US3720591A
公开(公告)日：1973-03-13
申请号：US3720591D
申请日：1971-12-28
申请人： TEXACO INC
发明人： SKARLOS L
摘要： An oxalate salt from which oxalic acid may be produced is prepared by the cationic reduction of carbon dioxide in an electrolytic cell wherein the anode and cathode compartments are separated by a porous membrane and the catholyte is an organic solvent. Tetraethylammonium perchlorate, tetraethylammonium bromide, tetrabutylammonium perchlorate, tetrabutylammonium iodide and tetraethylammonium p-toluenesulfonate are the preferred solutes for the catholyte. Coulombic yields as high as 75 percent are obtained where the anolyte is the same electrolyte and solvent as the catholyte while yields as high as 97 percent of sodium oxalate are obtained when aqueous solutions of sodium salts are used as the anolyte.
摘要翻译： 可以通过在电解池中阳离子还原二氧化碳来制备草酸盐，其中阳极室和阴极室由多孔膜分离，阴极电解液是有机溶剂。 四乙基高氯酸铵，四乙基溴化铵，四丁基高氯酸铵，四丁基碘化铵和对甲苯磺酸四乙基铵是阴极电解液的优选溶质。 获得高达75％的库仑产率，其中阳极电解液与阴极电解液是相同的电解质和溶剂，当钠盐的水溶液用作阳极电解液时，可获得高达97％的草酸钠。
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公开(公告)号：US3864225A
公开(公告)日：1975-02-04
申请号：US30775372
申请日：1972-11-17
申请人： MONSANTO CO
发明人： TYSSEE DONALD ARMON
CPC分类号： C25B3/04
摘要： Olefinic nitriles, esters and amides having hetero-atom containing groups are electrolytically carboxylated.
摘要翻译： 具有含杂原子的基团的烯属腈，酯和酰胺被电解羧化。
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公开(公告)号：US3714003A
公开(公告)日：1973-01-30
申请号：US3714003D
申请日：1970-06-29
申请人： MONSANTO CO
发明人： ENGELBRECHT R , MOORE R , ENGELBRECHT A , HILL J
CPC分类号： C25B3/02
摘要： Aryl carboxylic acids are produced from alkyl substituted aryl compounds or partially oxidized alkyl substituted aryl compounds in an electrolytic cell with a lead containing anode and using chromium in an ionized state in mineral acid as a carrier for electrons. The process is particularly useful in the oxidation of p-toluic acid to terephthalic acid and of tetra-alkyl benzene to tetracarboxylic acids. Both terephthalic acid and tetracarboxylic acids are useful in the production of polyester resins. Trimetallic acid used in making trimellitate plasticizers for polyvinyl chloride resins may also be produced by this process.
摘要翻译： 芳族羧酸由具有含铅阳极的电解池中的烷基取代的芳基化合物或部分氧化的烷基取代的芳基化合物产生，并且在无机酸中作为电子载体使用电离态的铬。 该方法特别可用于将对甲苯甲酸氧化成对苯二甲酸和四烷基苯至四羧酸。 对苯二甲酸和四羧酸都可用于生产聚酯树脂。 用于制备聚氯乙烯树脂的偏苯三酸酯增塑剂的三金属酸也可以通过该方法制备。
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6.发明授权Process to manufacture glyoxylic acid by electrochemical reduction of oxalic acid 失效通过电化学还原草酸制备乙醛酸的方法
公开(公告)号：US4692226A
公开(公告)日：1987-09-08
申请号：US901792
申请日：1986-08-29
CPC分类号： C25B3/04
摘要： This process, carried out at a temperature of 0.degree. to 30.degree. C. in an electrolyzer outfit consisting of at least one anode compartment containing an anode and anolyte, comprising an aqueous acid solution, at least one cathode compartment containing a cathode and catholyte, comprising an aqueous solution of oxalic acid and, between the two compartments, at least one separator, is characterized by the fact that the anode is made of a solid conductor uniformly coated with lead dioxide.
摘要翻译： 该方法在由包含阳极和阳极电解液的至少一个阳极室组成的电解装置中在0℃至30℃的温度下进行，包含酸水溶液，至少一个含有阴极和阴极电解液的阴极室， 包括草酸水溶液，并且在两个室之间，至少一个分离器的特征在于阳极由均匀涂覆有二氧化铅的固体导体制成。
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公开(公告)号：US3779875A
公开(公告)日：1973-12-18
申请号：US3779875D
申请日：1972-08-18
申请人： RHONE POULENC SA
发明人： MICHELET D
CPC分类号： C25B3/04
摘要： In the cathodic reduction of oxalic acid to glyoxylic acid production of hydrogen is reduced when the catholyte contains oxalic acid and 0.001 percent - 1 percent of an adjuvant which is a tertiary amine or quaternary ammonium derivative having more than 11 carbon atoms and, the nitrogen of which is not part of an unsaturated heterocyclic ring, or a heterocyclic tertiary amine or quaternary ammonium derivative thereof, the heterocyclic ring being unsaturated, containing a nitrogen atom and at least five carbon atoms.
摘要翻译： 当阴极还原草酸至乙醛酸时，当阴极电解液含有草酸和0.001％-1％的辅助剂（其为具有多于11个碳原子的叔胺或季铵衍生物）时，氢的产生将降低，氮 其不是不饱和杂环的一部分，或其杂环叔胺或季铵衍生物，杂环是不饱和的，含有氮原子和至少五个碳原子。
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公开(公告)号：US3471381A
公开(公告)日：1969-10-07
申请号：US3471381D
申请日：1967-03-20
申请人： BASF AG
发明人： SUTER HUBERT , NOHE HEINZ , BECK FRITZ , HRUBESCH ADOLPH
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