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11.发明授权
公开(公告)号：EP1969157B1
公开(公告)日：2009-06-03
申请号：EP06805360.2
申请日：2006-10-04
发明人： LANDAU, Uwe , JOLK, Ingo
IPC分类号： C23F11/16 , C10M105/72
CPC分类号： C23F11/161 , C10M173/02 , C10M177/00 , C10M2207/021 , C10M2209/104 , C10M2219/082 , C10N2220/14 , C10N2230/12 , C10N2250/121 , C10M2209/108
摘要： Disclosed is a passivator and lubricant for gold, silver, and copper surfaces and corresponding alloy surfaces. Said passivator and lubricant comprises an aqueous emulsion with a linear fatty alcohol as an emulsifier, especially at least one C12-C14 fatty alcohol containing about 8 ethoxy units. Preferably, the concentration of the fatty alcohol amounts to about 25 to 35 g/l. An organic hydrophobic thiol compound, particularly hexadecanethiol and/or octadecanethiol, is dissolved in said aqueous emulsion as an inhibitor at a preferred concentration of about 6 to 12 g/l. In order to prepare said emulsion, the emulsifier is first dissolved in a certain amount of water. Said solution is then thoroughly mixed and is preferably heated to a temperature ranging from about 42 to 49°, whereupon the inhibitor is added. The resulting solution is then further mixed until a uniform milky emulsion is obtained. Silver and copper surfaces that are to be passivated are initially treated with said aqueous emulsion and are then rinsed with water, the temperatures of the emulsion and the water being selected so as to exceed the melting point of the inhibitor.
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12.发明公开
公开(公告)号：EP1753896A1
公开(公告)日：2007-02-21
申请号：EP05750428.4
申请日：2005-05-04
发明人： LANDAU, Uwe , WIEDENBECK, Rainer
CPC分类号： C25D5/022 , C23F1/02 , C23F1/08 , C25D7/0614 , C25D7/0628 , C25D7/0678 , C25F3/14 , C25F7/00
摘要： The invention relates to a method for selectively coating or etching surfaces during which the surface areas that are not to be treated are masked with a masking device (18) during the actual coating or etching process. The masking device (18) is pressed against these surface areas in a liquid-tight manner by a magnetic interaction between a magnet device (24) and a counter magnet device (26), during which at least one of the magnet devices (24) is situated on the side of the masking device (18) facing away from the surface. The inventive method is particularly suited for electroplating (endless) metal strips (12). The metal strips (12) are moved past, for example, an anode spraying head (16) for applying a suitable electrolyte, around which a masking strip (18) is guided in a circle with a ferromagnetic mask pressing strip (24) situated on the side of the masking strip facing away from the metal strip. Opposite the anode spraying head (16), a carrying strip (30) is guided in a circle around a magnet head (26) having a number of electromagnets (26, , 26g). These are selected in such a manner that said strips (12, 18, 24, 30) are pressed tightly against one another and are moved past the anode spraying head (16) as a single unit. The invention also relates to a masking system and to a selective coating or etching system for carrying out this method.
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公开(公告)号：EP1606424B1
公开(公告)日：2006-07-19
申请号：EP04718619.2
申请日：2004-03-09
发明人： HERRMANN, Sigrid , LANDAU, Uwe
IPC分类号： C22B11/00
CPC分类号： C22B3/44 , C22B3/10 , C22B7/007 , C22B11/042 , C22B11/046 , Y02P10/214 , Y02P10/234
摘要： The invention relates to a method for the fine refinement of gold containing metallic impurities, According to said method, the gold to be refined is first dissolved in hydrochloric acid and hydrogen peroxide. The dissolution of the gold is controlled by separate dosing of said substances and/or by means of the mixture ratio thereof, enabling gold having an increasingly high purity to be obtained by successive dosing. The depletion of the impurities can be controlled by targeted heat supply and/or by influencing the heat rejection. The dissolved gold is then precipitated by stirring a sodium bisulfate solution into the hydrochloric acid gold solution, the precipitation of the gold being stimulated by avoiding an excess of sodium bisulfite solution. The precipitation is monitored by measuring the redox potential and is controlled by adapted dosing of the sodium bisulfite solution. The precipitated gold is then filtered again, washed and dried and provided for another use. The dissolution of the gold creates waste gas containing chlorine and a small proportion of metallic impurities. Said impurities are washed out of the waste gas in a washing device and are recovered from the used wash solution, while the chlorine is depleted from the waste gas by reaction with powdery gold in a corresponding filter device. The inventive method is especially suitable for refining powdery, ground, small-particle, film-type or wire-shaped gold.
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公开(公告)号：EP1606424A1
公开(公告)日：2005-12-21
申请号：EP04718619.2
申请日：2004-03-09
发明人： HERRMANN, Sigrid , LANDAU, Uwe
IPC分类号： C22B11/00
CPC分类号： C22B3/44 , C22B3/10 , C22B7/007 , C22B11/042 , C22B11/046 , Y02P10/214 , Y02P10/234
摘要： The invention relates to a method for the fine refinement of gold containing metallic impurities, According to said method, the gold to be refined is first dissolved in hydrochloric acid and hydrogen peroxide. The dissolution of the gold is controlled by separate dosing of said substances and/or by means of the mixture ratio thereof, enabling gold having an increasingly high purity to be obtained by successive dosing. The depletion of the impurities can be controlled by targeted heat supply and/or by influencing the heat rejection. The dissolved gold is then precipitated by stirring a sodium bisulfate solution into the hydrochloric acid gold solution, the precipitation of the gold being stimulated by avoiding an excess of sodium bisulfite solution. The precipitation is monitored by measuring the redox potential and is controlled by adapted dosing of the sodium bisulfite solution. The precipitated gold is then filtered again, washed and dried and provided for another use. The dissolution of the gold creates waste gas containing chlorine and a small proportion of metallic impurities. Said impurities are washed out of the waste gas in a washing device and are recovered from the used wash solution, while the chlorine is depleted from the waste gas by reaction with powdery gold in a corresponding filter device. The inventive method is especially suitable for refining powdery, ground, small-particle, film-type or wire-shaped gold.
摘要翻译： 本发明涉及一种含金属杂质金精细化方法，该方法首先将待精炼的金溶解在盐酸和过氧化氢中， 通过单独给药所述物质和/或通过其混合比来控制金的溶解，从而通过连续给药可以获得具有越来越高的纯度的金。 杂质的消耗可以通过目标供热和/或通过影响散热来控制。 然后通过将硫酸氢钠溶液搅拌到盐酸金溶液中来沉淀溶解的金，通过避免过量的亚硫酸氢钠溶液刺激金的沉淀。 通过测量氧化还原电位来监测沉淀，并通过调整亚硫酸氢钠溶液的剂量来控制沉淀。 然后将沉淀的金再次过滤，洗涤并干燥并提供另一用途。 金的溶解产生了含有氯气和少量金属杂质的废气。 在洗涤装置中将所述杂质从废气中洗出并从用过的洗涤溶液中回收，同时通过在相应的过滤装置中与粉末状金反应从废气中除去氯。 本发明的方法特别适用于精炼粉状，磨细的小颗粒，薄膜型或丝状金。
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公开(公告)号：EP1099010B1
公开(公告)日：2003-11-19
申请号：EP99939935.5
申请日：1999-06-23
发明人： HERRMANN, Sigrid , LANDAU, Uwe
CPC分类号： C25C1/20 , C25D21/18 , C25F5/00 , Y02P10/212
摘要： The invention relates to a method for detaching precious metal layers from a correspondingly coated material by dissolving the precious metals in a salt-containing alkali cyanide solution containing oxidizing agents. According to the invention the alkali cyanide solution continuously flows around the material positioned in a dissolution unit (22), preferably contains at least an alkali sulfate, an alkali metaborate and/or a nitroaromatic compound and for obtaining and/or regenerating the oxidizing agent is electrolytically oxidized in a closed circuit in an electrolytic cell (10). The method provided for by the invention there requires minimal quantities of chemicals, which results in correspondingly low recycling costs. If a nitroaromatic compound is used the oxidized solution is stable to such a degree that the dissolution process in the dissolution unit (22) and the oxidizing process in the electrolytic cell (10) can be carried out independently of each other. The precious metals dissolved in the alkali cyanide solution, such as gold, silver, palladium or such like, and/or impurities are preferably separated out electrolytically in the cathode compartment (28) of a further electrolytic cell (26) which chamber is separated from the corresponding anode compartment (30), which is filled with a powerful electrolyte, for example a 10 % potassium hydroxide solution, by a cation exchange membrane (32). Said membrane is preferably coated with a precious metal, notably gold, since this permits extremely high degrees of purity of up to 99 % during separation.
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16.发明授权
公开(公告)号：EP1051541B1
公开(公告)日：2001-11-28
申请号：EP99910109.0
申请日：1999-02-05
发明人： HERRMANN, Sigrid , LANDAU, Uwe
IPC分类号： C25D21/18
CPC分类号： C25D21/18
摘要： The invention relates to a method for electrically regenerating rhodium solutions, designed especially for regenerating rhodium solutions containing sulphuric acid and/or phosphoric acid or rhodium chloride solutions. The solution to be regenerated is introduced in the anode area (12) of an electrolytic cell (10), which is separated from the associated cathode area (14) by an ion exchange membrane (16), said cathode area being filled with a dilute acid having a good conductivity. The rhodium solution pH is increased so as to reach a value greater than 10, preferably in the range from 10 to 14, by adding an alkaline solution, i.e. a concentrated hydroxide potassium solution. Electrolysis is carried out at electric densities that are so high that the trivalent rhodium of the rhodium solution is oxidised to form an hexavalent rhodium, and possible impurities are depleted by the ion exchange membrane (16) in the catholytes. Hexavalent rhodium is transferred in the cathode area at a speed slightly smaller than trivalent rhodium, and therefore no noticeable rhodium depletion can be observed. This is particularly true when pH during electrolysis is maintained at a value permanently greater than 1.5 by means of proper addition of alkaline solution.
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17.发明公开
公开(公告)号：EP1051541A2
公开(公告)日：2000-11-15
申请号：EP99910109.0
申请日：1999-02-05
发明人： HERRMANN, Sigrid , LANDAU, Uwe
IPC分类号： C25C1/00
CPC分类号： C25D21/18
摘要： The invention relates to a method for electrically regenerating rhodium solutions, designed especially for regenerating rhodium solutions containing sulphuric acid and/or phosphoric acid or rhodium chloride solutions. The solution to be regenerated is introduced in the anode area (12) of an electrolytic cell (10), which is separated from the associated cathode area (14) by an ion exchange membrane (16), said cathode area being filled with a dilute acid having a good conductivity. The rhodium solution pH is increased so as to reach a value greater than 10, preferably in the range from 10 to 14, by adding an alkaline solution, i.e. a concentrated hydroxide potassium solution. Electrolysis is carried out at electric densities that are so high that the trivalent rhodium of the rhodium solution is oxidised to form an hexavalent rhodium, and possible impurities are depleted by the ion exchange membrane (16) in the catholytes. Hexavalent rhodium is transferred in the cathode area at a speed slightly smaller than trivalent rhodium, and therefore no noticeable rhodium depletion can be observed. This is particularly true when pH during electrolysis is maintained at a value permanently greater than 1.5 by means of proper addition of alkaline solution.
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