GB750496A - Improvements in or relating to spent pickling acids - Google Patents
Improvements in or relating to spent pickling acidsInfo
- Publication number
- GB750496A GB750496A GB2755152A GB2755152A GB750496A GB 750496 A GB750496 A GB 750496A GB 2755152 A GB2755152 A GB 2755152A GB 2755152 A GB2755152 A GB 2755152A GB 750496 A GB750496 A GB 750496A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquor
- acid
- ferrous sulphate
- waste
- concentrated
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/90—Separation; Purification
- C01B17/901—Recovery from spent acids containing metallic ions, e.g. hydrolysis acids, pickling acids
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/14—Sulfates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
Sulphuric acid is recovered from waste pickle liquor by adding concentrated sulphuric acid, e.g. B.O.V., so as to precipitate ferrous sulphate, withdrawing the precipitated ferrous sulphate together with an amount of acid substantially equal to that contained in the waste pickle liquor treated, evaporating the remaining mother liquor by the application of heat utilizing the steam thereby generated for heating the pickling liquor in the pickling stages and the concentrated acid for further precipitation of ferrous sulphate, separating the acid from the withdrawn ferrous sulphate, and using said acid in the pickling stage. The waste liquor may have a concentration of 12 per cent and its concentration may be raised to 55 per cent. The waste liquor may be added batchwise so that concentrated sulphuric acid, and the mother liquor remaining after the separation of ferrous sulphate evaporated in situ, e.g. by means of a steam coil. Alternatively the mother liquor may be concentrated in a separate vessel, and the reconcentrated acid returned to the precipitating vessel, enabling the waste liquor to be added continuously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2755152A GB750496A (en) | 1952-11-01 | 1952-11-01 | Improvements in or relating to spent pickling acids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2755152A GB750496A (en) | 1952-11-01 | 1952-11-01 | Improvements in or relating to spent pickling acids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB750496A true GB750496A (en) | 1956-06-20 |
Family
ID=10261438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2755152A Expired GB750496A (en) | 1952-11-01 | 1952-11-01 | Improvements in or relating to spent pickling acids |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB750496A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2167242A1 (en) * | 1972-01-11 | 1973-08-24 | Maltret Georges | Regeneration of sulphuric acid bath - by adding to conc acid bath to ppte out metal ions |
| WO2005040040A1 (en) * | 2003-10-06 | 2005-05-06 | Tronox Pigments Gmbh | Method for processing iron-laden spent sulfuric acid |
| CN116024577A (en) * | 2023-01-12 | 2023-04-28 | 赫明剑 | Treatment process of rust removal waste acid water |
-
1952
- 1952-11-01 GB GB2755152A patent/GB750496A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2167242A1 (en) * | 1972-01-11 | 1973-08-24 | Maltret Georges | Regeneration of sulphuric acid bath - by adding to conc acid bath to ppte out metal ions |
| WO2005040040A1 (en) * | 2003-10-06 | 2005-05-06 | Tronox Pigments Gmbh | Method for processing iron-laden spent sulfuric acid |
| JP2007508226A (en) * | 2003-10-06 | 2007-04-05 | トロノックス・ピグメンツ・ゲーエムベーハー | Treatment method of waste sulfuric acid mixed with iron |
| US7537749B2 (en) | 2003-10-06 | 2009-05-26 | Tronox Pigments Gmbh | Method for processing iron-laden spent sulfuric acid |
| CN116024577A (en) * | 2023-01-12 | 2023-04-28 | 赫明剑 | Treatment process of rust removal waste acid water |
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