EP0164437A1 - Solution pour remonter la teneur en sels de bains de sels fondus - Google Patents
Solution pour remonter la teneur en sels de bains de sels fondus Download PDFInfo
- Publication number
- EP0164437A1 EP0164437A1 EP84106831A EP84106831A EP0164437A1 EP 0164437 A1 EP0164437 A1 EP 0164437A1 EP 84106831 A EP84106831 A EP 84106831A EP 84106831 A EP84106831 A EP 84106831A EP 0164437 A1 EP0164437 A1 EP 0164437A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alkali
- nitrate
- solution
- salt
- hydroxide
- 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
Classifications
-
- 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
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/28—Cleaning or pickling metallic material with solutions or molten salts with molten salts
Definitions
- the invention relates to an aqueous solution which contains at least one alkali hydroxide and at least one alkali nitrate for supplementing the salt content of molten salt baths which contain alkali hydroxide and alkali nitrate by spraying the solution onto the hot bath surface.
- Melted salt baths are widely used in technology, for example for descaling steel parts or for surface treatment of metal parts. It is necessary to add to the bath components from time to time that are lost due to discharge, chemical reactions or evaporation. The bath components are usually supplemented by adding them in solid form.
- the composition remains constant and also forms even droplets when sprayed.
- the solution is saturated in a degree of alkali hydroxide, alkali nitrate and optionally other compounds, that it is liquid at 50 o C, that it has a sufficient viscosity for spraying and that it is stable and between 50 and 110 C is free from precipitation.
- aqueous solutions for supplementing salt baths from alkali metal hydroxides and alkali metal nitrates are obtained by preparing a saturated solution of an alkali metal hydroxide, an alkali metal nitrate and optionally other compounds, such as alkali metal chlorides or alkali metal permanganates, which is liquid at 50 ° C. has a sufficiently low viscosity to be sprayed in small droplets through nozzles and is free between 50 and 110 ° C of rainfall.
- the solutions preferably contain 20 to 35% by weight of alkali metal hydroxide, 5 to 25% by weight of alkali nitrate and 0 to 5% by weight of alkali metal chloride and / or alkali permanganate, the rest being water.
- the relatively least soluble compound is dissolved by adding water so that a saturated solution is formed on this compound.
- the remaining compounds are then present in amounts below the saturation limit.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Seasonings (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- General Preparation And Processing Of Foods (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84106831T ATE29528T1 (de) | 1984-06-15 | 1984-06-15 | Loesung zum ergaenzen des salzgehaltes von geschmolzenen salzbaedern. |
DE8484106831T DE3466019D1 (en) | 1984-06-15 | 1984-06-15 | Solution for replenishing the salt content of molten-salt baths |
EP84106831A EP0164437B1 (fr) | 1984-06-15 | 1984-06-15 | Solution pour remonter la teneur en sels de bains de sels fondus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP84106831A EP0164437B1 (fr) | 1984-06-15 | 1984-06-15 | Solution pour remonter la teneur en sels de bains de sels fondus |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0164437A1 true EP0164437A1 (fr) | 1985-12-18 |
EP0164437B1 EP0164437B1 (fr) | 1987-09-09 |
Family
ID=8191992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84106831A Expired EP0164437B1 (fr) | 1984-06-15 | 1984-06-15 | Solution pour remonter la teneur en sels de bains de sels fondus |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0164437B1 (fr) |
AT (1) | ATE29528T1 (fr) |
DE (1) | DE3466019D1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0507006A1 (fr) * | 1991-04-02 | 1992-10-07 | Unitika Ltd. | Méthode de traitement d'un bain de sels fondus |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1477220A (fr) * | 1966-04-25 | 1967-04-14 | Kolene Corp | Procédé et composition pour le nettoyage des métaux |
FR2359794A1 (fr) * | 1976-07-28 | 1978-02-24 | Degussa | Procede d'elimination des eaux usees des ateliers de trempe et de galvanisation |
US4109897A (en) * | 1976-04-05 | 1978-08-29 | Ajax Electric Company | Salt reclamation system |
US4113511A (en) * | 1977-01-17 | 1978-09-12 | Shoemaker Robert H | Liquid additions to fused chemical baths |
US4455251A (en) * | 1982-09-20 | 1984-06-19 | Kolene Corporation | Aqueous solution of alkali metal compositions |
-
1984
- 1984-06-15 EP EP84106831A patent/EP0164437B1/fr not_active Expired
- 1984-06-15 DE DE8484106831T patent/DE3466019D1/de not_active Expired
- 1984-06-15 AT AT84106831T patent/ATE29528T1/de not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1477220A (fr) * | 1966-04-25 | 1967-04-14 | Kolene Corp | Procédé et composition pour le nettoyage des métaux |
US4109897A (en) * | 1976-04-05 | 1978-08-29 | Ajax Electric Company | Salt reclamation system |
FR2359794A1 (fr) * | 1976-07-28 | 1978-02-24 | Degussa | Procede d'elimination des eaux usees des ateliers de trempe et de galvanisation |
US4113511A (en) * | 1977-01-17 | 1978-09-12 | Shoemaker Robert H | Liquid additions to fused chemical baths |
US4455251A (en) * | 1982-09-20 | 1984-06-19 | Kolene Corporation | Aqueous solution of alkali metal compositions |
Non-Patent Citations (2)
Title |
---|
CHEMICAL ABSTRACTS, Band 100, Nr. 24, 11. Juni 1984, Seite 258, Nr. 196068d, Columbus, Ohio, US; & JP - A - 58 199 880 (NIPPON STAINLESS STEEL CO., LTD.) 21.11.1983 * |
CHEMICAL ABSTRACTS, Band 101, Nr. 22, November 1984, Seiten 256,257, Nr. 196274p, Columbus, Ohio, US; & JP - A - 59 118 890 (PARKER SHOJI CO., LTD.)09.07.1984 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0507006A1 (fr) * | 1991-04-02 | 1992-10-07 | Unitika Ltd. | Méthode de traitement d'un bain de sels fondus |
US5496449A (en) * | 1991-04-02 | 1996-03-05 | Unitika, Ltd. | Method of treating salt bath liquid |
Also Published As
Publication number | Publication date |
---|---|
DE3466019D1 (en) | 1987-10-15 |
EP0164437B1 (fr) | 1987-09-09 |
ATE29528T1 (de) | 1987-09-15 |
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