EP2691561A1 - Anlage für das behandeln von werkstücken mit einer prozessflüssigkeit - Google Patents
Anlage für das behandeln von werkstücken mit einer prozessflüssigkeitInfo
- Publication number
- EP2691561A1 EP2691561A1 EP12703469.2A EP12703469A EP2691561A1 EP 2691561 A1 EP2691561 A1 EP 2691561A1 EP 12703469 A EP12703469 A EP 12703469A EP 2691561 A1 EP2691561 A1 EP 2691561A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid
- process fluid
- dirt particles
- filter
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 57
- 238000009434 installation Methods 0.000 title claims abstract 14
- 239000002245 particle Substances 0.000 claims abstract description 61
- 238000004140 cleaning Methods 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims description 103
- 239000007788 liquid Substances 0.000 claims description 64
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- 238000000926 separation method Methods 0.000 claims description 22
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 12
- 229910052725 zinc Inorganic materials 0.000 claims description 12
- 239000011701 zinc Substances 0.000 claims description 12
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 8
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000001103 potassium chloride Substances 0.000 claims description 4
- 235000011164 potassium chloride Nutrition 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000005246 galvanizing Methods 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 239000001034 iron oxide pigment Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- -1 polypropylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims description 2
- 229910000165 zinc phosphate Inorganic materials 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 6
- 238000009713 electroplating Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/06—Filtering particles other than ions
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/16—Regeneration of process solutions
- C25D21/18—Regeneration of process solutions of electrolytes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/16—Regeneration of process solutions
- C25D21/20—Regeneration of process solutions of rinse-solutions
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/22—Electroplating: Baths therefor from solutions of zinc
Definitions
- the invention relates to a system for treating workpieces with a process fluid in a workpiece application area, which has a line system for circulating the process fluid and which contains a cleaning device for the process fluid circulated by means of the line system.
- a process liquid also inherently contains dirt particles, for example anode sludge, anode flakes, decomposition products or even slag, which is introduced into the process liquid of galvanic plants on dissolution of metal in acid or alkaline baths.
- dirt particles for example anode sludge, anode flakes, decomposition products or even slag
- the process liquid is passed through a filter which retains the dirt particles according to their grain size on or in a filter medium. If the filter medium is added with dirt particles, it becomes impermeable. The filter media must then be cleaned and / or replaced.
- the object of the invention is to provide a plant for the treatment of workpieces with recirculated process liquid, which contains no dirt particles whose grain size exceeds a threshold, and which can be operated over very long periods of low maintenance.
- the cleaning device contains a separating device acted upon by an inlet opening with process fluid entrained in the process liquid, which emits process liquid through an overflow opening connected to the workpiece application area via a line section of the line system.
- the dirt particles with a characteristic amount a Max exceeding grain size G are withdrawn, and which provides at an underflow opening process liquid containing the process liquid withdrawn at the overflow dirt particles.
- the invention is based on the idea of separating a process fluid in a cleaning device, through which a process fluid is circulated in a system for treating workpieces, to separate dirt particles in the process fluid as a function of their particle size and to divide them into different flow paths of the process fluid.
- the separation device therefor preferably contains at least one cyclone with a cyclone housing which surrounds a cavity extending in a longitudinal direction with a taper and which has an inlet for tangential inflow of liquid from the conduit system, which forms an external vortex in the cavity, which due to the tapering of the Cavity in an internal vortex merges, which emerges from the cavity formed by a formed on the housing, connected by a line section with the workpiece application area overflow.
- the separation device makes it possible for the process fluid to be guided to the application area through a filter stage which does not have to filter out the dirt particles that have already been separated off. The result is that a filter medium is applied in this filter stage with less dirt particles. The filter body can then be operated with a longer service life.
- the system can be designed in particular as a galvanic plant.
- the process liquid is preferably supplied to the liquid process bath via the cleaning device from a solvent compartment for the production of process liquid, which is connected to the solvent compartment for the return of process liquid.
- the cleaning device for the process fluid circulated by means of the conduit system has a filter stage connected to the underflow opening of the separation apparatus for filtering out dirt particles from liquid flowing in the conduit system by at least one filter medium.
- This filter medium has favorably a separation grain size, which is greater than the separation grain size of the filter medium of the filter stage between the overflow opening of the separator and the workpiece application area.
- a filter medium in the filter stages is suitable, for. a filter bag or a filter candle or a filter plate.
- a circulating pump for circulating the process liquid in the piping system.
- this circulating pump is connected to the inlet opening of the separating device.
- the workpiece application area may be formed, for example, as a liquid process bath.
- the workpiece application area may include an array of electrodes for electroplating workpieces in the liquid process bath.
- This liquid process bath can contain, for example, sodium hydroxide, in which metallic zinc is dissolved.
- a concentration K Na oH of sodium hydroxide in the liquid process bath in the range 30 g / l ⁇ K Na oH ⁇ 0Og / l and a bath temperature T, which is in the range 25 ° ⁇ T ⁇ 85 ° ,
- a liquid process bath suitable for zinc plating may also contain potassium chloride acid in which metallic zinc is dissolved. It has been shown that here with a liquid process bath which has a pH of pH ⁇ 5 and a potassium chloride concentration K Ka ci with 250 g / l ⁇ K Ka ci, at a working temperature T in the range 50 ° ⁇ T ⁇ 50 ° high quality zinc surfaces can be produced.
- a plurality of cyclones are arranged with a cyclone housing which surrounds a longitudinally extending cavity with a taper and which is an inlet for tangential flow of liquid from the pipe system has, in the cavity forms a primary vortex, which merges due to the taper of the cavity in a secondary vortex, which exits through an opening formed on the housing, connected by a line section with the filter stage overflow from the cavity.
- the corrosion of assemblies of the cleaning device by acidic or alkaline process liquid can be prevented by the process liquid is guided in the system by modules that are at least partially made of plastic or coated with plastic or rubber.
- acid and / or laugebe operatingr plastic is particularly suitable with zinc phosphate and / or titanium dioxide and / or iron oxide pigments added epoxy resin or polypropylene.
- Fig. 1 shows a plant with cleaning device for the treatment of
- the separation curve of a cyclone in the cleaning device. 1 shows a system 10 for the treatment of workpieces 12 with a process fluid 14.
- the system 10 is a Galvanikstrom.
- the workpieces 12 can be galvanized.
- the workpieces 12 are arranged in a liquid process bath 16.
- the liquid process bath 16 is filled with sodium hydroxide solution as process liquid in which metallic zinc is dissolved.
- the galvanic plant 10 has a current source 18.
- the positive pole of the current source 18 is connected to an immersed in the process liquid electrode 22, which acts as an anode.
- the negative pole 24 of the current source 18 is connected to the workpieces 12.
- the workpieces 12 in the process liquid act as electrodes.
- Electrodes act as a cathode.
- the metallic zinc dissolved in the process fluid 14 is deposited on the surface 26 of the workpieces 12.
- the release compartment 32 is a liquid bath separate from the liquid processing bath 16.
- metallic zinc 33 which is to be deposited on the workpieces 12, is dissolved in the process liquid 14.
- dirt particles 87 are introduced into the process fluid 14 in the form of slag.
- the process fluid 14 In order to achieve a high surface quality during the galvanizing of the workpieces 12 in the process fluid 14, the process fluid 14 must not contain any dirt particles 86, 87 in the process bath 16. If there are too many dirt particles 86, 87 in the process liquid 14 in the liquid bath 16, the zinc layer which acts on the workpieces 12 during electroplating has an undesirable roughness.
- the line system 28 contains a circulation pump 34.
- the process liquid 14 is circulated through the cleaning device 30.
- the liquid volume in the liquid process bath 16 is thus passed through the cleaning device 30 between two and three times within one hour.
- the circulation pump 34 With the circulation pump 34, the process fluid 14 is moved through the cleaning device 30.
- the cleaning device 30 contains a separating device 58 with a plurality of cyclones 36.
- the separating device 58 has an inlet opening 88. Through this inlet opening 88, the separating device 58 is supplied with process fluid 14 which contains dirt particles 86.
- the separation device 58 has an overflow opening 90.
- the separation device 58 delivers process fluid 14, from which, in particular, dirt particles 87 are separated, which have a characteristic amount a Max exceeding the grain size G. These separated dirt particles 87 are supplied with process liquid via an underflow opening 92 of the separation device 58 through the conduit system 28 to the release compartment 32 the system 10 fed again.
- Each cyclone 36 is made of caustic soda chemically resistant plastic material.
- Each cyclone has a cyclone body 38.
- the cyclone body 38 surrounds a tapered cavity extending in a longitudinal direction 40.
- the cyclone housing 38 has an inlet 44.
- the inlet 44 opens into the cavity 42 with an opening 46.
- the process fluid 14 circulated by the circulating pump 34 in the system 28 in accordance with the flow direction 48 is flowed into the cavity 42 tangentially.
- the process fluid 14 circulated by the circulating pump 34 in the system 28 in accordance with the flow direction 48 is flowed into the cavity 42 tangentially.
- In the cavity 42 thereby creates an outer vortex 50, which merges due to the taper of the cavity 42 in an Innnenwirbel 52.
- the internal vortex 52 exits the cavity 42 through an overflow 54 formed on the housing 38.
- In the cyclone housing 38 there is an underflow opening 56.
- the cyclones 36 are arranged in a container 57 of the separating device 58.
- the container 57 is made of stainless steel. It has a funnel-shaped bottom compartment 60, a central compartment 62 and a ceiling compartment 64.
- the underflow opening 56 of each cyclone 36 opens into the bottom compartment 60.
- the overflow 54 of each cyclone housing 38 has an opening located in the ceiling compartment 64.
- the cleaning device 30 includes a first filter stage 66 and a second filter stage 68 for the filtration of dirt particles from the process liquid 14.
- the second filter stage 68 is located in a line section 33 of the conduit system 28 between the release compartment 32 and the Trennvor- direction 58.
- the ceiling compartment 64th of the container 58 is connected to the first filter stage 66.
- the filter stage 66 is thus supplied with the process liquid 14 from the respective overflow 54 of a cyclone housing 38.
- the bottom part 60, the middle part 62 and the ceiling compartment 64 are coated with a layer of ceramic particles 65. This causes the container 57 can not corrode.
- this coating 65 ensures that the container wall is protected from abrasion by dirt particles 86, 87 entrained in the process fluid. It should be noted that a chemical Resistance and protection of the wall of the container 57 before abrasion can also be achieved by nickel plating or plasma coating.
- the bottom compartment 60 of the container 58 is connected to the second filter stage 68.
- the filter stages 66, 68 are each assigned a bypass section 70, 72 with shut-off valves 71, 73, 74, 76, 78, 80.
- the line system 28 in the system 10 contains a line section 82, via which the process fluid 14 can flow back out of the process bath 16 into the release compartment 32.
- the dissolved in the process liquid 16 zinc is passed through the cleaning device 30 with the process liquid 14 and the entrained dirt particles 86, 87.
- the dirt particles 86, 87 are separated according to their grain size G in each cyclone 36 of the cleaning device.
- Large grain diameter particulate matter 87 is carried outwardly in a cyclone 36 under the action of centrifugal force in the outer vertebra 50 and moved through the tapered cavity 42 in the cyclone housing 38 to the underflow opening 56.
- Dirt particles 86 having a small grain diameter are received in the cyclone 36 with the inner vertebra 52. They arrive with the process fluid 14 to the overflow 54 of a cyclone 36.
- Dirt particles 86, 87 with a grain size G at the lower run 56 and the overflow 54 of a cyclone 36 is.
- the separation grain size a K of the cyclones 36 is about 15 ⁇ .
- Dirt particles whose particle size G exceeds the amount a max do not reach the filter stage 66.
- the filter stage 66 thus contains only dirt particles which have a relatively small particle diameter.
- the filter stage 68 is acted upon by process fluid 14 containing dirt particles 87, whose grain size G is greater than the grain size a max and in which there are relatively few dirt particles with a small grain size.
- the filter stages 66, 68 therefore contain a filter medium 67, 69 with a different separation grain size.
- Ki of the filter medium 67 in the first filter stage 66 applies: ⁇ - ⁇ « ⁇ .
- K 2 of the second filter stage 68 K 2 ⁇ 30 ⁇ » ⁇ - ⁇ .
- As a filter medium in the filter stages 66, 68 are particularly filter plates, filter bags or filter cartridges.
- the separation device 58 in the cleaning device 30 causes the continuous circulation of process fluid 14 from the release compartment 32 through the second filter stage 68. Because the separation grain size K 2 of the filter medium 69 of the second filter stage 68, however, is relatively large, only dirt particles 87 with a particle size G are here retained, which exceeds the separation grain size K 2 .
- the first filter stage 66 receives only a few dirt particles with a large grain diameter.
- filter medium 69 has a large separation particle size, so that it is not added by dirt particles having a comparatively small particle size.
- the second filter stage 68 can therefore also be operated for a long time until a cleaning or replacement of the filter medium 69 is required.
- a plant for treating workpieces 12 with a process fluid 14 has a workpiece application area 16.
- the facility 10 contains a conduit system 28 for circulating the process fluid 17 used in the workpiece application area 16.
- a cleaning device 30 for the process fluid circulated by means of the line system 29.
- the cleaning device 30 contains a separating device 58 charged with process fluid 14 via an inlet opening 88 for dirt particles 86 entrained in the process fluid 14.
- the separating device 58 transmits a connected via a line section 28 with the workpiece application area 16 from overflow liquid 14 from the dirt particles, in particular dirt particles 86 are withdrawn with a characteristic amount a Max exceeding grain size G.
- the separation device 58 provides process fluid 14, which contains the dirt particles 86 extracted from the process fluid 14 at the overflow.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Cyclones (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201110006616 DE102011006616A1 (de) | 2011-03-31 | 2011-03-31 | Anlage für das Behandeln von Werkstücken mit einer Prozessflüssigkeit |
| PCT/EP2012/050853 WO2012130491A1 (de) | 2011-03-31 | 2012-01-20 | Anlage für das behandeln von werkstücken mit einer prozessflüssigkeit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2691561A1 true EP2691561A1 (de) | 2014-02-05 |
| EP2691561B1 EP2691561B1 (de) | 2015-03-18 |
Family
ID=45581835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12703469.2A Not-in-force EP2691561B1 (de) | 2011-03-31 | 2012-01-20 | Anlage für das behandeln von werkstücken mit einer prozessflüssigkeit |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2691561B1 (de) |
| CN (1) | CN103476973B (de) |
| DE (1) | DE102011006616A1 (de) |
| WO (1) | WO2012130491A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106801235B (zh) * | 2015-05-12 | 2018-06-08 | 江苏理工学院 | 降低加工成本的超临界复合电铸体系回收利用装置 |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE504437A (de) * | 1950-07-04 | |||
| BE646220A (de) * | 1964-01-22 | 1964-07-31 | ||
| US3994721A (en) * | 1972-06-30 | 1976-11-30 | Societa Mineraria E Metallurgica Di Pertusola | Purifying a zinc-bearing solution by cementation |
| DE2729387A1 (de) * | 1977-06-27 | 1979-01-18 | Schering Ag | Verfahren zur kontinuierlichen aufbereitung eines galvanischen nickelbades sowie vorrichtung zur durchfuehrung des verfahrens |
| JPS6141773A (ja) * | 1984-07-31 | 1986-02-28 | Hino Motors Ltd | 無電解めつき液の添加微粒子分離装置 |
| CN86203029U (zh) * | 1986-05-24 | 1987-02-11 | 长海电镀厂 | 多效旁路式过滤机 |
| DE3634122A1 (de) * | 1986-10-07 | 1988-04-21 | Brombach Hansjoerg | Wirbelabscheider |
| DE4031979A1 (de) * | 1990-09-26 | 1992-04-02 | Huang Yun Fu | Vorrichtung zum entfernen von verunreinigungen, die in chrom-galvanisierbaedern enthalten sind |
| US5766440A (en) * | 1995-08-28 | 1998-06-16 | Kawasaki Steel Corporation | Method for treating sludge precipitated in a plating bath containing haloid ions |
| GB9802042D0 (en) * | 1998-01-31 | 1998-03-25 | Classic Chemicals Limited | Improvements in electroless nickel plating |
| US8298395B2 (en) * | 1999-06-30 | 2012-10-30 | Chema Technology, Inc. | Electroplating apparatus |
| JP2001131789A (ja) * | 1999-10-29 | 2001-05-15 | Nisshin Steel Co Ltd | 電気めっき鋼板の前処理方法および前処理装置 |
| US20040053132A1 (en) * | 2002-09-12 | 2004-03-18 | Smedley Stuart I. | Improved fuel for a zinc-based fuel cell and regeneration thereof |
| JP4462851B2 (ja) * | 2003-06-13 | 2010-05-12 | 三洋電機株式会社 | 導電部材の製造方法 |
| DE102004038693B4 (de) * | 2004-08-10 | 2010-02-25 | Blasberg Werra Chemie Gmbh | Vorrichtung und Verfahren zur Entfernung von Fremdstoffen aus Prozesslösungen und Verfahren zur Regenerierung eines Kationenaustauschers |
| CN2736375Y (zh) * | 2004-08-30 | 2005-10-26 | 朱国富 | 一种镍槽液中锌、铜杂质去除机 |
| US20090032457A1 (en) * | 2005-08-12 | 2009-02-05 | Oscar Castro Soto | Hydrocyclones |
| EP1958699A1 (de) * | 2006-07-01 | 2008-08-20 | Genimin | Verfahren und Vorrichtung zur Verbesserung des Betriebs der Hydrozyklonen |
| CN101245486A (zh) * | 2008-03-17 | 2008-08-20 | 沈阳师范大学 | 老化铜箔电镀液有害杂质去除方法 |
-
2011
- 2011-03-31 DE DE201110006616 patent/DE102011006616A1/de not_active Withdrawn
-
2012
- 2012-01-20 EP EP12703469.2A patent/EP2691561B1/de not_active Not-in-force
- 2012-01-20 CN CN201280016935.8A patent/CN103476973B/zh not_active Withdrawn - After Issue
- 2012-01-20 WO PCT/EP2012/050853 patent/WO2012130491A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2012130491A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2691561B1 (de) | 2015-03-18 |
| CN103476973B (zh) | 2016-08-24 |
| CN103476973A (zh) | 2013-12-25 |
| DE102011006616A1 (de) | 2012-10-04 |
| WO2012130491A1 (de) | 2012-10-04 |
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