GB703142A - Process for the continuous regeneration of waste pickling liquors - Google Patents
Process for the continuous regeneration of waste pickling liquorsInfo
- Publication number
- GB703142A GB703142A GB15331/52A GB1533152A GB703142A GB 703142 A GB703142 A GB 703142A GB 15331/52 A GB15331/52 A GB 15331/52A GB 1533152 A GB1533152 A GB 1533152A GB 703142 A GB703142 A GB 703142A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydrogen chloride
- chloride
- ferrous
- decomposition
- continuous regeneration
- 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)
- Removal Of Specific Substances (AREA)
Abstract
Ferrous salts dissolved in spent pickling liquor or suitably crystallized therefrom by cooling are converted by treatment with gaseous hydrogen chloride (advantageously under pressure) to crystalline ferrous chloride and the latter decomposed by steam at, e.g. 400-500 DEG C. or preferably by heating the hydrated crystals at 400-600 DEG C. to give iron oxide and hydrogen chloride which is recycled. Air may be admitted during the decomposition if a high valency oxide is required. The hydrogen chloride may be dried with concentrated sulphuric acid, the latter reconcentrated, and the separated water reused to effect decomposition of ferrous chloride, preferably after heat exchange with the out-going hydrochloric acid.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT703142X | 1951-07-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB703142A true GB703142A (en) | 1954-01-27 |
Family
ID=3679496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15331/52A Expired GB703142A (en) | 1951-07-11 | 1952-06-18 | Process for the continuous regeneration of waste pickling liquors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB703142A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2785957A (en) * | 1955-02-28 | 1957-03-19 | Ruthner Othmar | Regeneration of pickling liquor |
| CN115246663A (en) * | 2021-12-17 | 2022-10-28 | 徐州瑞马智能技术有限公司 | Hot-dip galvanizing zinc-containing waste acid treatment process |
-
1952
- 1952-06-18 GB GB15331/52A patent/GB703142A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2785957A (en) * | 1955-02-28 | 1957-03-19 | Ruthner Othmar | Regeneration of pickling liquor |
| CN115246663A (en) * | 2021-12-17 | 2022-10-28 | 徐州瑞马智能技术有限公司 | Hot-dip galvanizing zinc-containing waste acid treatment process |
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