GB996007A - A method of recovering hydrochloric acid from aluminium etching or pickling baths - Google Patents
A method of recovering hydrochloric acid from aluminium etching or pickling bathsInfo
- Publication number
- GB996007A GB996007A GB2426261A GB2426261A GB996007A GB 996007 A GB996007 A GB 996007A GB 2426261 A GB2426261 A GB 2426261A GB 2426261 A GB2426261 A GB 2426261A GB 996007 A GB996007 A GB 996007A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydrochloric acid
- aluminium
- stage
- chloride solution
- aluminium oxide
- 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.)
- Expired
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
- C23G1/36—Regeneration of waste pickling liquors
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)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Hydrochloric acid and aluminium oxide are recovered from aluminium pickling bath liquors by a three-stage process involving first a distillation to remove hydrochloric acid which may be accompanied by a concentration of the remaining aluminium chloride solution. The aluminium chloride solution is then admixed with aluminium oxide to form a solid mass which is roasted in the third stage to yield hydrogen chloride and water vapour, which are condensed to give hydrochloric acid. The dilute hydrochloric acid obtained from the distillation stage may be used for washing out the hydrochloric acid from the vaporous products of the roasting stage. The aluminium chloride solution may be crystallized prior to admixture with the aluminium oxide. The crystallization may be effected by the addition of hydrogen chloride from the roasting stage to the aluminium chloride solution.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT525560A AT217822B (en) | 1960-07-08 | 1960-07-08 | Process for regenerating the free and used hydrochloric acid from aluminum etching baths |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB996007A true GB996007A (en) | 1965-06-23 |
Family
ID=3573711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2426261A Expired GB996007A (en) | 1960-07-08 | 1961-07-05 | A method of recovering hydrochloric acid from aluminium etching or pickling baths |
Country Status (2)
| Country | Link |
|---|---|
| AT (1) | AT217822B (en) |
| GB (1) | GB996007A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2140400A (en) * | 1981-04-29 | 1984-11-28 | Comalco Alu | Treatment of aluminous materials to produce metallurgical grade alumina |
| GB2154122A (en) * | 1984-02-14 | 1985-09-04 | Gastone Zanello | Electrically operated self-cleaning ashtray |
-
1960
- 1960-07-08 AT AT525560A patent/AT217822B/en active
-
1961
- 1961-07-05 GB GB2426261A patent/GB996007A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2140400A (en) * | 1981-04-29 | 1984-11-28 | Comalco Alu | Treatment of aluminous materials to produce metallurgical grade alumina |
| GB2154122A (en) * | 1984-02-14 | 1985-09-04 | Gastone Zanello | Electrically operated self-cleaning ashtray |
Also Published As
| Publication number | Publication date |
|---|---|
| AT217822B (en) | 1961-10-25 |
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