JPS5547226A - Treating method for aged mixed solution of chromic acid and sulfuric acid - Google Patents
Treating method for aged mixed solution of chromic acid and sulfuric acidInfo
- Publication number
- JPS5547226A JPS5547226A JP11798178A JP11798178A JPS5547226A JP S5547226 A JPS5547226 A JP S5547226A JP 11798178 A JP11798178 A JP 11798178A JP 11798178 A JP11798178 A JP 11798178A JP S5547226 A JPS5547226 A JP S5547226A
- Authority
- JP
- Japan
- Prior art keywords
- soln
- aged
- chromic acid
- sulfuric acid
- sodium
- 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
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Removal Of Specific Substances (AREA)
Abstract
PURPOSE: To recover chromium as chromium oxide from an aged mixed soln. of chromic acid and sulfuric acid by adding sodium chromate or sodium dichromate to the soln. followed by neutralization, thermal decomposition and dissolution separation of a water sol. component.
CONSTITUTION: Sodium chromate or sodium dichromate is added to an aged mixed soln. of chromic acid and sulfuric acid to prepare a soln. based on chromic acid and sodium sulfate, and this soln. is neutralized to pH 6W7 with ammonia. After removing precipitates as required, the soln. is evaporated to dryness by heating, and the dry solid is decomposed by heating. A water sol. component is then dissolution- separated to obtain chromium oxide. When an aged soln. discharging place and a treating site are distant from each other, by adding sodium chromate or sodium dichromate to the aged soln. prior to transportation the corrosive action of the soln. is weakened remarkably, and the soln. can be stored for a time and transported in a polyethylene container.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11798178A JPS5547226A (en) | 1978-09-27 | 1978-09-27 | Treating method for aged mixed solution of chromic acid and sulfuric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11798178A JPS5547226A (en) | 1978-09-27 | 1978-09-27 | Treating method for aged mixed solution of chromic acid and sulfuric acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5547226A true JPS5547226A (en) | 1980-04-03 |
| JPS5531092B2 JPS5531092B2 (en) | 1980-08-15 |
Family
ID=14725050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11798178A Granted JPS5547226A (en) | 1978-09-27 | 1978-09-27 | Treating method for aged mixed solution of chromic acid and sulfuric acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5547226A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445284A (en) * | 2013-09-24 | 2015-03-25 | 中国科学院过程工程研究所 | Method for separating and recovering anhydrous sodium sulfate, concentrated sulfuric acid and chromium from chromium-containing sodium bisulfate |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6028043U (en) * | 1983-08-03 | 1985-02-25 | 三菱重工業株式会社 | Electrostatic precipitator support device |
-
1978
- 1978-09-27 JP JP11798178A patent/JPS5547226A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445284A (en) * | 2013-09-24 | 2015-03-25 | 中国科学院过程工程研究所 | Method for separating and recovering anhydrous sodium sulfate, concentrated sulfuric acid and chromium from chromium-containing sodium bisulfate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5531092B2 (en) | 1980-08-15 |
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