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公开(公告)号：EP4361315A1
公开(公告)日：2024-05-01
申请号：EP23156461.8
申请日：2023-02-14
发明人： KIM, Sang Wook , KIM, Sang Soo , PARK, Mi Jung , KIM, Ju A , LEE, Ji Hyun
IPC分类号： C23G1/18 , C23G1/20 , C23G1/26 , C25C1/18 , C25C5/02 , C25C7/08 , C25D1/04 , C25C1/12 , C25C7/02 , C25C7/06 , C25D17/10 , C25B11/00 , C23G1/36 , C11D11/00 , C22B3/00 , C23G1/24
CPC分类号： C25C7/08 , C25C5/02 , C25D1/04 , C23G1/18 , C23G1/20 , C23G1/26 , C25C1/12 , C25C7/02 , C25C7/06 , C25B11/00 , C23G1/36 , C22B13/045 , C25C1/18 , C23G1/24 , C11D7/265 , C11D7/3245 , C11D2111/2020240101
摘要： Disclosed is a method of removing lead materials from an anode for manufacturing copper foil to regenerate the anode. The method includes cleaning solution preparation, anode cleaning and anode washing. The cleaning solution preparation includes preparing a cleaning solution containing an aqueous solution of EDTA and citric acid. The cleaning solution used to perform the anode cleaning has a pH of 7 to 9 and a temperature of 20 to 50°C. The anode cleaning includes cleaning the anode by immersing the anode including the lead materials attached to the surface thereof in the cleaning solution to perform EDTA-Pb chelation. As a result, the transfer of the lead materials from the anode to the cleaning solution means substantial removal of the lead materials from the anode. The anode, from which the lead materials have been removed, is washed using a high-pressure washer.
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公开(公告)号：EP3926074B1
公开(公告)日：2024-03-06
申请号：EP19921211.9
申请日：2019-03-22
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5.发明公开
公开(公告)号：EP3845686A1
公开(公告)日：2021-07-07
申请号：EP19878119.7
申请日：2019-10-16
发明人： MIKAWA, Hiroaki , MIYAZAKI, Taisuke , IMASAKA, Koji , SAKANISHI, Akihiro , EGAWA, Kaoru , NAGAI, Masahiko
摘要： In an acidic treatment liquid processing apparatus, a space between a first electrode and a second electrode spaced from each other is separated by a first diaphragm permeable and a second diaphragm into a first chamber, a second chamber, and a third chamber. While the first chamber is fed with an acidic treatment liquid containing a dichromate ion and a metal cation, the second chamber is fed with a first acid aqueous solution, and the third chamber is fed with a second acid aqueous solution, a voltage is applied using the first electrode as an anode and the second electrode as a cathode.
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公开(公告)号：EP3114253B1
公开(公告)日：2017-11-22
申请号：EP15708468.2
申请日：2015-02-26
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8.发明公开VERFAHREN ZUR GEWINNUNG BZW. RÜCKGEWINNUNG VON SALPETERSÄURE UND FLUSSSÄURE AUS LÖSUNGEN VON EDELSTAHLBEIZANLAGEN 有权程序获得或 RECOVERING SOLUTIONS不锈钢酸洗硝酸和氢氟酸
公开(公告)号：EP2561119A1
公开(公告)日：2013-02-27
申请号：EP11718235.2
申请日：2011-04-18
摘要： The invention relates to a method for obtaining or recovering acids, in particular nitric acid and hydrofluoric acid, from solutions and/or from solutions containing metal salts of said acids, comprising the following steps: a) spray drying the solutions at temperatures below the decomposition temperature of the acids, wherein the energy required therefor is introduced by means of a gaseous heat-transfer medium in order to obtain dry metal salts and gaseous acids; b) absorbing the gaseous acids formed in step a); c) separating the dry metal salts formed in step a); optionally d) burning the dry metal salts obtained in step a) at temperatures in the range of 400-900 °C in order to obtain metal oxides and gaseous acids; and e) absorbing the gaseous acids formed in step d).
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9.发明公开PROCÉDÉ DE RÉGÉNÉRATION D'UNE SOLUTION DE DÉCAPAGE OU D'USINAGE CHIMIQUE DE TITANE 有权再生方法中的一种解决酸洗或化学铣切TITANIUM
公开(公告)号：EP2438210A1
公开(公告)日：2012-04-11
申请号：EP10734217.2
申请日：2010-06-03
发明人： CROS, Caroline , BARES, Pierre
摘要： The invention relates to a method of regenerating a spent titanium etching solution that is based on hydrofluoric acid and nitric acid and contains dissolved titanium. Said method involves determining the hydrofluoric acid and nitric acid concentrations in the solution, comparing each of the measured values with a respective associated predetermined threshold value, and adding KF and/or KNO
3 to the solution when the respective HF and/or HNO
3 concentration in the solution is below the associated threshold value. The method also includes determining the titanium concentration in the solution, comparing the measured value with a predetermined limit, and adding KF and KNO
3 to the solution if the measured value exceeds said limit.-
公开(公告)号：EP2352859A2
公开(公告)日：2011-08-10
申请号：EP09796936.4
申请日：2009-11-03
申请人： König, Thomas
发明人： König, Thomas
摘要： Disclosed are a method for treating aluminum or aluminum alloy workpieces and a plant that can be operated according to such a method. According to the invention, a partial amount of a solution is withdrawn from a bath for treating the workpieces, solids are removed from said partial amount of the solution, and the partial amount of the solution is fed back to the bath at a predetermined concentration and a predetermined volume flow rate.
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