EP0557912A1 - Procédé de dégraissage d'objets métalliques - Google Patents
Procédé de dégraissage d'objets métalliques Download PDFInfo
- Publication number
- EP0557912A1 EP0557912A1 EP93102701A EP93102701A EP0557912A1 EP 0557912 A1 EP0557912 A1 EP 0557912A1 EP 93102701 A EP93102701 A EP 93102701A EP 93102701 A EP93102701 A EP 93102701A EP 0557912 A1 EP0557912 A1 EP 0557912A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- degreasing
- metallic objects
- elongated metallic
- agent
- degreasing agent
- 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
- 238000005238 degreasing Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002184 metal Substances 0.000 title description 4
- 229910052751 metal Inorganic materials 0.000 title description 4
- 239000013527 degreasing agent Substances 0.000 claims abstract description 20
- 238000005237 degreasing agent Methods 0.000 claims abstract description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 239000010949 copper Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000009428 plumbing Methods 0.000 claims abstract 2
- 238000001035 drying Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 description 3
- 150000008282 halocarbons Chemical class 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical compound ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 235000013861 fat-free Nutrition 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/24—Hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
- C23G5/024—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing hydrocarbons
Definitions
- the invention relates to a method for degreasing elongated metallic objects, in particular hard and semi-hard copper installation pipes, with a liquid degreasing agent.
- Chlorinated and / or fluorinated hydrocarbons have hitherto been used in the industrial manufacture of metal products to which particularly high demands are placed in terms of cleanliness and grease-free material surfaces, for example for subsequent machining processes such as chrome plating and tinning.
- degreasing agents has proven problematic in recent years in that their components have been suspected of being toxic and / or damaging the ozone layer.
- very complex exhaust air purification systems are required so that the maximum permissible concentration at the workplace is not exceeded.
- the invention has for its object to provide a method with which elongated metal objects, such as rods, profiles and pipes, can be degreased economically and in particular in an environmentally friendly manner.
- This object is achieved in a process of the type mentioned at the outset by briefly treating the metallic objects with a mixture of halogen-free aliphatic hydrocarbons at a temperature in the temperature range from 35 to 55 ° C. and then drying them.
- Halogen-free aliphatic hydrocarbons and their mixtures are generally known as so-called cold cleaners and are offered on the market under various trade names.
- This liquid degreaser evaporates relatively quickly in the temperature range between 35 and 55 ° C, although it has a stable flash point above 58 ° C.
- the degreasing agent is not subject to labeling according to the Hazardous Substances Ordinance.
- the tube bundle is particularly advantageous to lean the tube bundle out of the degreasing bath several times to allow the degreasing agent to flow through the tubes and thus intensify the degreasing of the inner surfaces.
- the tubes can then be stored over the degreasing bath for about 10 minutes so that the degreasing agent can drain.
- the tube bundle is then placed in a swiveling cassette and blown with an air flow at an incline of approximately 70 ° from top to bottom. Warm air can be used to speed up the drying process. The air flow supports both the drainage of the degreasing agent and its evaporation.
- the lubricant or residual carbon content on the inner surface of the copper pipes had decreased to less than 0.15 mg / dm2 after degreasing.
- the degreasing bath can be particularly advantageously coupled to a distillation system, with a partial amount of the degreasing agent contaminated with drawing oil being continuously regenerated and fed back to the degreasing bath. With the return of the cleaned degreasing agent to the degreasing bath, the consumption of the degreasing agent remains limited to the absolutely necessary amount. Furthermore, the degreasing bath can be adjusted to a constant fat content.
- a vacuum still can preferably be used for the regeneration of the contaminated degreasing agent in order to carry out the cleaning at the lowest possible temperatures.
- the metal objects to be degreased are additionally degreased cold in a preliminary stage, it is possible to reduce the degreasing agent consumption even further and to make better use of the fat absorption capacity of the temperature-controlled degreasing bath.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Catalysts (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4206058 | 1992-02-27 | ||
| DE4206058A DE4206058A1 (de) | 1992-02-27 | 1992-02-27 | Verfahren zum entfetten von langgestreckten metallischen gegenstaenden |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0557912A1 true EP0557912A1 (fr) | 1993-09-01 |
| EP0557912B1 EP0557912B1 (fr) | 1998-08-12 |
Family
ID=6452738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93102701A Expired - Lifetime EP0557912B1 (fr) | 1992-02-27 | 1993-02-20 | Procédé de dégraissage d'objets métalliques |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0557912B1 (fr) |
| AT (1) | ATE169693T1 (fr) |
| DE (2) | DE4206058A1 (fr) |
| ES (1) | ES2121879T3 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4316144A1 (de) * | 1993-05-14 | 1994-11-17 | Siemens Ag | Verfahren und Einrichtung zur Reinigung eines gezogenen Drahtes |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57126978A (en) * | 1981-01-29 | 1982-08-06 | Mitsubishi Heavy Ind Ltd | Method and apparatus for continuously degreasing and washing metal strip |
| DE3537619A1 (de) * | 1985-10-23 | 1987-04-23 | Bayer Ag | Mittel fuer die kaltwaesche |
| JPH01219150A (ja) * | 1988-02-26 | 1989-09-01 | Furukawa Electric Co Ltd:The | 銅管の光輝焼鈍方法 |
| DE3935032A1 (de) * | 1989-10-20 | 1991-04-25 | Manfred Roesler | Verfahren und vorrichtung zum reinigen und trocknen von gegenstaenden |
| WO1991006690A1 (fr) * | 1989-11-01 | 1991-05-16 | Henkel Kommanditgesellschaft Auf Aktien | Melange pour le nettoyage de cartes imprimees |
| WO1991019831A1 (fr) * | 1990-06-11 | 1991-12-26 | Martin Marietta Corporation | Compositions de nettoyage contenant des cycloparaffines et leur procede d'utilisation |
| EP0474053A1 (fr) * | 1990-08-27 | 1992-03-11 | Petroferm Inc. | Procédé de nettoyage |
-
1992
- 1992-02-27 DE DE4206058A patent/DE4206058A1/de not_active Withdrawn
-
1993
- 1993-02-20 EP EP93102701A patent/EP0557912B1/fr not_active Expired - Lifetime
- 1993-02-20 ES ES93102701T patent/ES2121879T3/es not_active Expired - Lifetime
- 1993-02-20 DE DE59308852T patent/DE59308852D1/de not_active Expired - Fee Related
- 1993-02-20 AT AT93102701T patent/ATE169693T1/de not_active IP Right Cessation
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57126978A (en) * | 1981-01-29 | 1982-08-06 | Mitsubishi Heavy Ind Ltd | Method and apparatus for continuously degreasing and washing metal strip |
| DE3537619A1 (de) * | 1985-10-23 | 1987-04-23 | Bayer Ag | Mittel fuer die kaltwaesche |
| JPH01219150A (ja) * | 1988-02-26 | 1989-09-01 | Furukawa Electric Co Ltd:The | 銅管の光輝焼鈍方法 |
| DE3935032A1 (de) * | 1989-10-20 | 1991-04-25 | Manfred Roesler | Verfahren und vorrichtung zum reinigen und trocknen von gegenstaenden |
| WO1991006690A1 (fr) * | 1989-11-01 | 1991-05-16 | Henkel Kommanditgesellschaft Auf Aktien | Melange pour le nettoyage de cartes imprimees |
| WO1991019831A1 (fr) * | 1990-06-11 | 1991-12-26 | Martin Marietta Corporation | Compositions de nettoyage contenant des cycloparaffines et leur procede d'utilisation |
| EP0474053A1 (fr) * | 1990-08-27 | 1992-03-11 | Petroferm Inc. | Procédé de nettoyage |
Non-Patent Citations (2)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 006, no. 223 (C - 133)<1101> 9 November 1982 (1982-11-09) * |
| PATENT ABSTRACTS OF JAPAN vol. 013, no. 536 (C - 660)<3884> 29 November 1989 (1989-11-29) * |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2121879T3 (es) | 1998-12-16 |
| ATE169693T1 (de) | 1998-08-15 |
| EP0557912B1 (fr) | 1998-08-12 |
| DE4206058A1 (de) | 1993-09-02 |
| DE59308852D1 (de) | 1998-09-17 |
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