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
Links
- 239000003792 electrolyte Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000010422 painting Methods 0.000 title claims abstract description 10
- 150000002500 ions Chemical class 0.000 claims abstract description 25
- 238000001223 reverse osmosis Methods 0.000 claims description 14
- 239000012466 permeate Substances 0.000 claims description 13
- 239000012141 concentrate Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 9
- 238000007654 immersion Methods 0.000 description 9
- 239000002253 acid Substances 0.000 description 8
- 230000014759 maintenance of location Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000004922 lacquer Substances 0.000 description 5
- 229910021645 metal ion Inorganic materials 0.000 description 4
- RPAJSBKBKSSMLJ-DFWYDOINSA-N (2s)-2-aminopentanedioic acid;hydrochloride Chemical class Cl.OC(=O)[C@@H](N)CCC(O)=O RPAJSBKBKSSMLJ-DFWYDOINSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 3
- 150000001805 chlorine compounds Chemical class 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000003618 dip coating Methods 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 206010063493 Premature ageing Diseases 0.000 description 1
- 208000032038 Premature aging Diseases 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000001652 electrophoretic deposition Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007591 painting process Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- -1 salt ions Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical compound NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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 |
---|---|---|---|
EP98922987A EP0964942A1 (de) | 1997-06-12 | 1998-06-10 | Verfahren zum aufbereiten eines für eine elektrophoretische lackierung eingesetzten elektrolyten |
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 |
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 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 |
---|---|---|---|---|
EP1170051A2 (de) * | 2000-07-06 | 2002-01-09 | 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 WO PCT/IB1998/000899 patent/WO1998056964A1/de not_active Application Discontinuation
- 1998-06-10 DE DE19880824T patent/DE19880824D2/de not_active Expired - Fee Related
- 1998-06-10 AU AU75442/98A patent/AU7544298A/en not_active Abandoned
- 1998-06-10 EP EP98922987A patent/EP0964942A1/de not_active Withdrawn
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 (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1170051A2 (de) * | 2000-07-06 | 2002-01-09 | Clark Permar | Vorrichtung zum Filtrieren von Flüssigkeiten |
EP1170051A3 (de) * | 2000-07-06 | 2003-02-05 | Clark Permar | Vorrichtung zum Filtrieren von Flüssigkeiten |
Also Published As
Publication number | Publication date |
---|---|
EP0964942A1 (de) | 1999-12-22 |
ATA101997A (de) | 1998-04-15 |
DE19880824D2 (de) | 1999-11-25 |
AT404434B (de) | 1998-11-25 |
AU7544298A (en) | 1998-12-30 |
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