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1. 发明授权

US5127999A Process for the preparation of alkali metal dichromates and chromic acid by electrolysis 失效
标题翻译：通过电解制备碱金属重铬酸盐和铬酸的方法
公开(公告)号：US5127999A
公开(公告)日：1992-07-07
申请号：US713625
申请日：1991-06-10
申请人： Helmut Klotz , Rainer Weber , Norbert Lonhoff , Hans-Dieter Block , Hans D. Pinter
发明人： Helmut Klotz , Rainer Weber , Norbert Lonhoff , Hans-Dieter Block , Hans D. Pinter
IPC分类号： C25B1/14 , C01G37/14 , C25B1/22 , C25B1/28
CPC分类号： C25B1/22 , C25B1/28
摘要： A process for the preparation of alkali metal dichromates and/or chromic acid by electrolysis of alkali metal monochromate and/or alkali metal dichromate solution in electrolysis cells, the anode and cathode compartments of which are separated by cation exchange membranes, wherein the cation exchange membranes are single-layer membranes based on perfluorinated polymers having sulfonic acid groups as cation exchange groups, and an aqueous solution having a pH of 4 to 14 is produced in the cathode compartment of the cells.
摘要翻译：一种通过在电解池中电解碱金属单色和/或碱金属重铬酸盐溶液来制备碱金属重铬酸盐和/或铬酸的方法，其阳极和阴极室由阳离子交换膜分离，其中阳离子交换膜是基于具有磺酸基作为阳离子交换基团的全氟化聚合物的单层膜，并且在电池的阴极室中产生pH为4至14的水溶液。

2. 发明授权

US5094729A Processes for the preparation of alkali metal dichromates and chromic acid 失效
标题翻译：制备碱金属二铬酸盐和铬酸的方法
公开(公告)号：US5094729A
公开(公告)日：1992-03-10
申请号：US659435
申请日：1991-02-22
申请人： Helmut Klotz , Hans D. Pinter , Rainer Weber , Hans-Dieter Block , Norbert Lonhoff
发明人： Helmut Klotz , Hans D. Pinter , Rainer Weber , Hans-Dieter Block , Norbert Lonhoff
IPC分类号： C01G37/14 , C25B1/14 , C25B1/22
CPC分类号： C25B1/22
摘要： A process for the preparation of alkali metal dichromates and chromic acid by the electrolysis of monochromate and/or dichromate solutions in an electrolytic cell in which the anode and cathode chamber are separated by a cation exchanger membrane anolyte fluid containing dichromate and/or chromic acid being formed in the anode chamber and alkaline catholyte fluid containing alkali metal ions being formed in the cathode chamber, the improvement wherein the catholyte fluids are periodically replaced by a solution which is at a pH below 6.
摘要翻译：通过在电解池中电解单色和/或重铬酸盐溶液来制备碱金属重铬酸盐和铬酸的方法，其中阳极室和阴极室由含有重铬酸盐和/或铬酸的阳离子交换膜阳极电解液分离，形成在阳极室中，并且在阴极室中形成含有碱金属离子的碱性阴极电解液，其中阴极电解液周期性地被pH低于6的溶液所取代。

3. 发明授权

US5051155A Processes for the preparation of alkali metal dichromates and chromic acid 失效
标题翻译：碱金属重铬酸盐和铬酸的制备方法
公开(公告)号：US5051155A
公开(公告)日：1991-09-24
申请号：US632417
申请日：1990-12-21
申请人： Helmut Klotz , Hans D. Pinter , Rainer Weber , Hans-Dieter Block , Norbert Lonhoff
发明人： Helmut Klotz , Hans D. Pinter , Rainer Weber , Hans-Dieter Block , Norbert Lonhoff
IPC分类号： C01G37/14 , C25B1/14 , C25B1/22
CPC分类号： C25B1/22
摘要： A process for the preparation of alkali metal dichromates and chromic acid by the electrolysis of monochromate and/or dichromate solutions in an electrolytic cell in which the anode and cathode chambers are separated by cation exchange member, the improvement wherein the formation of deposits on the membrane is prevented comprising continuously introducing a solution containing chromate at a pH of about 3 to 10 into the cathode chamber during the electrolysis.
摘要翻译：通过在阳极交换构件中分离阳极室和阴极室的电解池中电解单色和/或重铬酸盐溶液来制备碱金属重铬酸盐和铬酸的方法，其中在膜上形成沉积物可防止在电解过程中将含有约3〜10的pH的铬酸盐溶液连续引入阴极室。

4. 发明授权

US5071522A Process for the preparation of chromic acid 失效
标题翻译：制备色素的方法
公开(公告)号：US5071522A
公开(公告)日：1991-12-10
申请号：US663031
申请日：1991-02-25
申请人： Helmut Klotz , Hans D. Pinter , Rainer Weber , Hans-Dieter Block , Norbert Lonhoff
发明人： Helmut Klotz , Hans D. Pinter , Rainer Weber , Hans-Dieter Block , Norbert Lonhoff
IPC分类号： C01G37/14 , C25B1/14 , C25B1/22
CPC分类号： C25B1/22
摘要： A process for the preparation of chromic acid by the electrolysis of dichromate and/or monochromate solutions in electrolytic cells in which the anode chamber and the cathode chamber are separated by a cation exchanger membrane, the improvement wherein the chromic acid content of the solution in the anode chamber is periodically increased above that of a continuous operating state.
摘要翻译：通过在阳极室和阴极室被阳离子交换膜分离的电解池中电解重铬酸盐和/或单色溶液来制备铬酸的方法，其中溶液的铬酸含量在阳极室周期性地增加到高于连续工作状态的阳极室。

5. 发明授权

US4981573A Process for the production of alkali dichromates and chromic acid employing an anode of valve metal activated by electrodepositing noble metals from melts 失效
标题翻译：使用通过从熔体中电沉积贵金属而活化的阀门金属的阳极来生产碱性重铬酸盐和铬酸的方法
公开(公告)号：US4981573A
公开(公告)日：1991-01-01
申请号：US392873
申请日：1989-08-11
申请人： Helmut Klotz , Rainer Weber , Hans-Dieter Block , Norbert Lonhoff
发明人： Helmut Klotz , Rainer Weber , Hans-Dieter Block , Norbert Lonhoff
IPC分类号： C01G37/14 , C25B1/14 , C25B1/22 , C25B11/08
CPC分类号： C25B1/22
摘要： A process for the production of alkali dichromates and chromic acid by electrolysis of alkali monochromate or alkali dichromate solutions wherein the anodes used in the electrolysis are dimensionally stable anodes of valve metals activated by electrodeposition of noble metals and/or noble compounds from melts containing noble metal salts.
摘要翻译：通过电解碱性单色酸盐或碱性重铬酸盐溶液来生产碱性重铬酸盐和铬酸的方法，其中用于电解的阳极是通过从含有贵金属的熔体电沉积贵金属和/或贵金属而活化的阀金属的尺寸稳定的阳极盐。

6. 发明授权

US5128000A Dimensionally stable anodes and their use in the preparation of alkali metal dichromates and chromic acid 失效
标题翻译：尺寸稳定的阳极及其在制备碱金属重铬酸盐和铬酸中的应用
公开(公告)号：US5128000A
公开(公告)日：1992-07-07
申请号：US680602
申请日：1991-04-01
申请人： Helmut Klotz , Rainer Weber , Norbert Lonhoff , Hans-Dieter Block
发明人： Helmut Klotz , Rainer Weber , Norbert Lonhoff , Hans-Dieter Block
IPC分类号： C25B11/00 , C25B1/14 , C25B1/22 , C25B11/04 , C25B11/06 , C25B11/10 , C25D3/66
CPC分类号： C25B1/22 , C25B1/14 , C25B11/0478
摘要： A dimensionally stable anode comprised ofa) an electrically conductive valve metalb) a conductive intermediate layer andc) an electrode coating of an electrocatalytically active substance, wherein the intermediate layer comprises one or more noble metals or their alloys which have been applied to the valve metal by deposition by electroplating from melts containing noble metal salts. This anode can be used in the production alkali metal dichromates and chromic acid by electrolysis of alkali metal monochromate and/or alkali metal dichromate solutions.
摘要翻译：一种尺寸稳定的阳极，包括a）导电阀金属b）导电中间层和c）电催化活性物质的电极涂层，其中所述中间层包含一种或多种贵金属或其合金，其被施加到通过从含有贵金属盐的熔体中电镀而沉积阀门金属。该阳极可以通过电解碱金属单色和/或碱金属重铬酸盐溶液来生产碱金属重铬酸盐和铬酸。

7. 发明授权

US5068015A Electrochemical process for the production of chromic acid 失效
标题翻译：电化学工艺生产氯酸
公开(公告)号：US5068015A
公开(公告)日：1991-11-26
申请号：US393733
申请日：1989-08-15
申请人： Hans-Dieter Block , Norbert Lonhoff , Bernd Makowka , Helmut Klotz , Rainer Weber , Bernhard Spreckelmeyer
发明人： Hans-Dieter Block , Norbert Lonhoff , Bernd Makowka , Helmut Klotz , Rainer Weber , Bernhard Spreckelmeyer
IPC分类号： C25B1/00 , C25B1/22 , C25B15/08
CPC分类号： C25B1/22
摘要： A process for the production of chromic acid by the multistage electrolysis of dichromate and/or monochromate solutions in two-compartment electrolysis cells, of which the anode and cathode compartments are separated by cation exchanger membranes, at temperatures in the range from 50.degree. to 90.degree. C., the dichromate and/or monochromate solutions being obtained by the digestion of chrome ores and leaching, the improvement wherein, optionally after the removal of aluminum, vanadium and other impurities, the monochromate solution obtained after leaching is adjusted at 20.degree. to 110.degree. C. to a pH value of from 8 to 12 by the addition and/or in situ formation of carbonate in a quantity of from 0.01 to 0.18 mol/l (for 300 to 500 g/l Na.sub.2 CrO.sub.4, converted with CO.sub.2 under pressure into a dichromate-containing solution, the dichromate-containing solution is introduced into the anode compartment of the electrolysis cell, a solution containing chromic acid, in which the molar ratio of Na ions to chromic acid is from 0.45:0.55 to 0.30:0.70, is electrolytically produced and the chromic acid is worked up by crystallization, washing and drying.
摘要翻译：通过在两室电解池中的重铬酸盐和/或单色溶液的多级电解生产铬酸的方法，其中阳极和阴极室由阳离子交换膜分离，温度范围为50至90℃ ℃，通过铬矿和沥滤的消解获得的重铬酸盐和/或单色溶液，其中任选地在除去铝，钒和其它杂质之后，将浸出后获得的单色溶液调节至20℃至通过加入和/或原位形成量为0.01至0.18mol / l的碳酸盐（对于300至500g / l的Na 2 CrO 4，在压力下用CO 2转化），将pH值为8至12 将含有重铬酸盐的溶液引入电解槽的阳极室中，将含有铬酸的溶液与Na离子的摩尔比欧米酸为0.45:0.55-0.30:0.70，经电解生产，铬酸通过结晶，洗涤和干燥处理。

8. 发明授权

US5505918A Method for manufacturing alkali chromates from chromium ore 失效
标题翻译：从铬矿生产铬酸铬的方法
公开(公告)号：US5505918A
公开(公告)日：1996-04-09
申请号：US314553
申请日：1994-09-28
申请人： Uwe Arndt , Michael Batz , Rainer Bellinghausen , Hans-Dieter Block , Heinrich Helker , Norbert Lonhoff , Hans-Heinrich Moretto , Hans-Georg Nieder-Vahrenholz , Hans Rinkes , Bernhard Spreckelmeyer , Rainer Weber
发明人： Uwe Arndt , Michael Batz , Rainer Bellinghausen , Hans-Dieter Block , Heinrich Helker , Norbert Lonhoff , Hans-Heinrich Moretto , Hans-Georg Nieder-Vahrenholz , Hans Rinkes , Bernhard Spreckelmeyer , Rainer Weber
IPC分类号： C01G37/14 , C22B34/32
CPC分类号： C01G37/14
摘要： A method for manufacturing alkali chromates by the reacting of chromium ore with alkali compounds and oxidation in an atmosphere containing at least 50% oxygen is described, in which the mixture consisting of chromium ore, alkali compound and optionally leaning materials is heated in a first stage in an atmosphere containing not more than 5 vol. % oxygen to a temperature between 1000.degree. and 1 400.degree. C., and in a second stage is oxidized at a lower temperature of 900.degree. to 1 070.degree. C. with supply of an atmosphere containing at least 50% oxygen.
摘要翻译：描述了通过铬矿与碱性化合物的反应并在含有至少50％的氧的气氛中进行氧化来制造碱铬酸盐的方法，其中由铬矿，碱化合物和任选的倾斜材料组成的混合物在第一阶段中被加热在不超过5体积的气氛中。氧气的氧气温度在1000-400℃之间，第二阶段在900℃至110℃的较低温度下被氧化，同时供给含有至少50％氧气的气氛。

9. 发明授权

US5667759A Method for manufacturing alkali chromates from chromium ore 失效
标题翻译：从铬矿生产铬酸铬的方法
公开(公告)号：US5667759A
公开(公告)日：1997-09-16
申请号：US690420
申请日：1996-07-26
申请人： Rainer Bellinghausen , Heinrich Helker , Paul Strehlow , Hans-Heinrich Moretto , Bernhard Spreckelmeyer , Norbert Lonhoff , Michael Batz , Rainer Weber , Hans Rinkes , Hans-Dieter Block , Uwe Arndt
发明人： Rainer Bellinghausen , Heinrich Helker , Paul Strehlow , Hans-Heinrich Moretto , Bernhard Spreckelmeyer , Norbert Lonhoff , Michael Batz , Rainer Weber , Hans Rinkes , Hans-Dieter Block , Uwe Arndt
IPC分类号： C01G37/14 , C01G37/00
CPC分类号： C01G37/14
摘要： A method for the decomposition of chromium ore in a directly heated revolving tube is described, in which oxygen-containing gases are introduced into the revolving tube by means of below-bed nozzles.
摘要翻译：描述了在直接加热的旋转管中分解铬矿的方法，其中含氧气体通过下床喷嘴引入回转管中。

10. 发明授权

US5096548A Process for the preparation of chromic acid 失效
标题翻译：制备色素的方法
公开(公告)号：US5096548A
公开(公告)日：1992-03-17
申请号：US626076
申请日：1990-12-11
申请人： Norbert Lonhoff , Ludwig Schmidt , Hans-Dieter Block , Rainer Weber
发明人： Norbert Lonhoff , Ludwig Schmidt , Hans-Dieter Block , Rainer Weber
IPC分类号： C25B1/00 , B01J47/12 , C01G37/033 , C25B1/22 , C25B15/08 , C25C1/10
CPC分类号： C01G37/033 , C25B1/22 , C25C1/10
摘要： A process for the production of chromic acid, comprising(a) dissolving ferrochrome in sulphuric acid and mother liquor from the subsequent crystallization of ammonium chrome alum, optionally with the addition of at least one of catholyte and anolyte overflow from the subsequent electrolysis,(b) removing undissolved constituents by filtration,(c) removing dissolved iron by the addition of at least one of ammonia and ammonium sulphate to the filtrate obtained, crystallizing iron ammonium sulphate and filtering,(d) crystallizing and filtering ammonium chrome alum from the remaining solution and returning the filtrate for dissolving ferrochrome in step (a),(e) dissolving the ammonium chrome alum in water,(f) precipitating and separating chromium-(III) hydroxide from the resulting solution by adding a base, optionally under reducing conditions,(g) dissolving the separated chromium hydroxide in chromic acid and optionally sulphuric acid so that either a single solution in chromic acid is obtained or two solutions are obtained, one in chromic acid and another in sulphuric acid,(h) separating the solution(s) from undissolved constituents, and(i) utilizing the solution of chromium hydroxide in chromic acid as anolyte in the electrolytic production of chromic acid in an electrolytic cell divided by a membrane, and either utilizing the same solution as catholyte in the above mentioned electrolytic cell divided by a membrane or utilizing the solution of chromium hydroxide in sulphuric acid as catholyte in the above mentioned electrolytic cell divided by a membrane, hydrogen and metallic chromium being deposited electrolytically at the cathode and/or chromium (II) ions being produced electrolytically at the cathode.
摘要翻译：一种生产铬酸的方法，包括（a）将铬铁铬酸盐和母液从随后的铵铬明矾结晶中溶解，任选地从随后的电解中加入至少一种阴极电解液和阳极电解液溢出物（b ）通过过滤除去未溶解的组分，（c）通过向所得滤液中加入至少一种氨和硫酸铵除去溶解的铁，结晶硫酸铁铵并过滤，（d）从剩余溶液中结晶并过滤铵铬明矾并在步骤（a）中返回用于溶解铬铁的滤液，（e）将铵铬明矾溶解在水中，（f）通过加入碱（任选在还原条件下）将所得溶液中的铬 - （III）（g）将分离的氢氧化铬溶解在铬酸和任选的硫酸中，使得单一的铬酸溶液得到两种溶液，一种在铬酸中，另一种在硫酸中，（h）将溶液与未溶解的组分分离，和（i）在电解生产中利用铬酸中的铬酸溶液作为阳极电解液在由电解槽中分离的膜中的铬酸，或者利用与上述电解槽中的阴极电解液相同的溶液，或者利用氢氧化铬溶液作为阴极电解液，除去上述电解槽在阴极处电解沉积的阴极和/或铬（II）离子沉积的膜，氢和金属铬。

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