WO1998056964A1 - Verfahren zum aufbereiten eines für eine elektrophoretische lackierung eingesetzten elektrolyten - Google Patents
Verfahren zum aufbereiten eines für eine elektrophoretische lackierung eingesetzten elektrolyten Download PDFInfo
- Publication number
- WO1998056964A1 WO1998056964A1 PCT/IB1998/000899 IB9800899W WO9856964A1 WO 1998056964 A1 WO1998056964 A1 WO 1998056964A1 IB 9800899 W IB9800899 W IB 9800899W WO 9856964 A1 WO9856964 A1 WO 9856964A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrolyte
- ions
- reverse osmosis
- electrolyte used
- circuit
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/22—Servicing or operating apparatus or multistep processes
- C25D13/24—Regeneration of process liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
- B01D61/026—Reverse osmosis; Hyperfiltration comprising multiple reverse osmosis steps
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Definitions
- the membrane selected is essentially only overcome by the solvent, the ions dissolved in the removed part of the electrolyte can be retained and the permeate can advantageously be returned to the electrolyte as a replacement liquid. It is therefore only necessary to replace the concentrate retained in the reverse osmosis by demineralized water, which significantly reduces the need for demineralized water.
- the concentration of the pollutants, in particular formed by the heavy metals facilitates their elimination during subsequent processing of the concentrate which has been separated out, so that overall a particularly economical procedure is obtained.
- a membrane surface adapted to the volume flow has to be provided, which generally requires several membrane units, each of which has a partial flow of the removed electrolyte is supplied.
- Particularly favorable design conditions result in this connection if the withdrawn part of the electrolyte is subjected to a reverse osmosis in several cycles, the permeate of each cycle being part of the replacement liquid being fed to the electrolyte used and the concentrate being at least partially fed to the next cycle. This is possible without worsening of the separation conditions, because the retention capacity, particularly with regard to the chloride ions, remains largely the same over the concentration ranges in question.
- the immersion bath 1 for the electrophoretic painting for example of body parts 2 connected as cathode, is equipped with anodes 3, which are separated from the actual immersion bath by semipermeable membranes 4, so that the electrolyte used in the anode area is free of lacquer ions remains, which are deposited on the cathode with the binder.
- the resulting anions dissolved in the electrolyte, especially acid and chloride ions can penetrate the membranes 4, which leads to a corresponding concentration of these anions in the anode area. So that this ion concentration does not cause premature electrode corrosion and thus impair the dip coating, the ion concentration must be diluted.
- the concentrate from the membrane assemblies 6 is fed back to the feed line 8 via concentrate lines 11, in the flow direction upstream of the respective feed branch 12, so that a circuit a, b, c, and d results for each membrane assembly.
- This is possible because the retention capacity of the membrane units 6 is largely independent of the ion concentration, in particular with respect to the chloride ions in the concentration ranges that occur.
- the reduction in the respective permeate throughput due to the higher ion concentration can be compensated for by a corresponding pressure increase via the pumps 7, which only have to cover the pressure loss in the respective circuit a, b, c, d.
- the inlet pressure required for the reverse osmosis is ensured via a pre-pressure pump 13 and a subsequent main pressure pump 14.
- the concentrate from the last cycle d is discarded or processed in a suitable manner, advantageous separation conditions opening up because of the comparatively high concentration of pollutants.
- the pollutants are the metal ions released from the body parts, which penetrate the membranes 4 around the anodes 3 of the immersion bath 1 despite their positive charge and are retained in the concentrate by the membrane units 6.
- the discarded volume flow of the concentrate must, however, be taken into account when the permeate is returned to the immersion bath 1. This rejected volume flow is replaced by demineralized water, which is fed to the permeate container 10, as indicated by the supply line 15.
- the invention is not limited to the exemplary embodiment described, and can advantageously be used wherever excessive ion concentrations occur in electrophoretic painting, which stress the electrodes and thus can impair the painting process. It is only of minor importance whether the lacquer ions are deposited cathodically or anodically on the workpiece.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Nanotechnology (AREA)
- Electrochemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19880824T DE19880824D2 (de) | 1997-06-12 | 1998-06-10 | Verfahren zum Aufbereiten eines für eine elektrophoretische Lackierung eingesetzten Elektrolyten |
| AU75442/98A AU7544298A (en) | 1997-06-12 | 1998-06-10 | Method for treating an electrolyte used for electrophoretic painting |
| EP98922987A EP0964942A1 (de) | 1997-06-12 | 1998-06-10 | Verfahren zum aufbereiten eines für eine elektrophoretische lackierung eingesetzten elektrolyten |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT1019/97 | 1997-06-12 | ||
| AT101997A AT404434B (de) | 1997-06-12 | 1997-06-12 | Verfahren zum aufbereiten eines für eine elektrophoretische lackierung eingesetzten elektrolyten |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998056964A1 true WO1998056964A1 (de) | 1998-12-17 |
Family
ID=3505007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB1998/000899 Ceased WO1998056964A1 (de) | 1997-06-12 | 1998-06-10 | Verfahren zum aufbereiten eines für eine elektrophoretische lackierung eingesetzten elektrolyten |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0964942A1 (de) |
| AT (1) | AT404434B (de) |
| AU (1) | AU7544298A (de) |
| DE (1) | DE19880824D2 (de) |
| WO (1) | WO1998056964A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1170051A3 (de) * | 2000-07-06 | 2003-02-05 | Clark Permar | Vorrichtung zum Filtrieren von Flüssigkeiten |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5669394A (en) * | 1979-11-07 | 1981-06-10 | Nippon Paint Co Ltd | Electrodeposition painting method |
| EP0210837A2 (de) * | 1985-07-25 | 1987-02-04 | Research And Development Association For Membrane Applications To The Food Industries | Verfahren zur Anwendung von umgekehrter Osmose |
| JPH01108398A (ja) * | 1987-10-19 | 1989-04-25 | Kansai Paint Co Ltd | カチオン電着塗装における隔膜陽極水の管理方法 |
| US5047128A (en) * | 1990-01-02 | 1991-09-10 | Shipley Company Inc. | Electrodialysis cell for removal of excess electrolytes formed during electrodeposition of photoresists coatings |
| US5507929A (en) * | 1994-07-21 | 1996-04-16 | Koch Membrane Systems, Inc. | Submergible electrode apparatus for dialysis |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1179423A (en) * | 1967-03-22 | 1970-01-28 | Pressed Steel Fisher Ltd | Treatment of Effluents by the Reverse Osmosis Process |
| BE794656A (fr) * | 1972-02-25 | 1973-05-16 | Citroen Sa | Procede et installation d'electrodeposition de peinture |
| JPS594664A (ja) * | 1982-06-29 | 1984-01-11 | Mitsubishi Electric Corp | 電着塗料の製造法 |
| JPS6130699A (ja) * | 1984-07-19 | 1986-02-12 | Shinto Paint Co Ltd | 電着塗装方法 |
| US5393390A (en) * | 1991-05-08 | 1995-02-28 | Akzo Nobel Nv | Treatment and recycling of overspray from the spray application of waterborne coatings |
-
1997
- 1997-06-12 AT AT101997A patent/AT404434B/de active
-
1998
- 1998-06-10 EP EP98922987A patent/EP0964942A1/de not_active Withdrawn
- 1998-06-10 DE DE19880824T patent/DE19880824D2/de not_active Expired - Fee Related
- 1998-06-10 WO PCT/IB1998/000899 patent/WO1998056964A1/de not_active Ceased
- 1998-06-10 AU AU75442/98A patent/AU7544298A/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5669394A (en) * | 1979-11-07 | 1981-06-10 | Nippon Paint Co Ltd | Electrodeposition painting method |
| EP0210837A2 (de) * | 1985-07-25 | 1987-02-04 | Research And Development Association For Membrane Applications To The Food Industries | Verfahren zur Anwendung von umgekehrter Osmose |
| JPH01108398A (ja) * | 1987-10-19 | 1989-04-25 | Kansai Paint Co Ltd | カチオン電着塗装における隔膜陽極水の管理方法 |
| US5047128A (en) * | 1990-01-02 | 1991-09-10 | Shipley Company Inc. | Electrodialysis cell for removal of excess electrolytes formed during electrodeposition of photoresists coatings |
| US5507929A (en) * | 1994-07-21 | 1996-04-16 | Koch Membrane Systems, Inc. | Submergible electrode apparatus for dialysis |
Non-Patent Citations (5)
| Title |
|---|
| DATABASE WPI Section Ch Week 8241, Derwent World Patents Index; Class M11, AN 82-87321e, XP002080048 * |
| DATABASE WPI Section Ch Week 8922, Derwent World Patents Index; Class D15, AN 89-163610, XP002080047 * |
| DATABASE WPI Week 9824, Derwent World Patents Index; AN 98-261943, XP002081237 * |
| PATENT ABSTRACTS OF JAPAN vol. 005, no. 136 (C - 069) 28 August 1981 (1981-08-28) * |
| PATENT ABSTRACTS OF JAPAN vol. 013, no. 331 (C - 622) 25 July 1989 (1989-07-25) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1170051A3 (de) * | 2000-07-06 | 2003-02-05 | Clark Permar | Vorrichtung zum Filtrieren von Flüssigkeiten |
Also Published As
| Publication number | Publication date |
|---|---|
| AT404434B (de) | 1998-11-25 |
| DE19880824D2 (de) | 1999-11-25 |
| EP0964942A1 (de) | 1999-12-22 |
| ATA101997A (de) | 1998-04-15 |
| AU7544298A (en) | 1998-12-30 |
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