FR773390A - Sulfuric acid purification process - Google Patents
Sulfuric acid purification processInfo
- Publication number
- FR773390A FR773390A FR773390DA FR773390A FR 773390 A FR773390 A FR 773390A FR 773390D A FR773390D A FR 773390DA FR 773390 A FR773390 A FR 773390A
- Authority
- FR
- France
- Prior art keywords
- acid
- filtering
- impurities
- filtration
- sulfuric acid
- 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
- 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
-
- 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
- C01B17/907—Removal of arsenic
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Abstract
Sulphuric acid is purified by passing hydrogen sulphide through the acid until the impurities are completely precipitated, filtering the acid, heating the filtered acid to a temperature above 80 DEG C., and again filtering it. The filtration steps may be carried out in a pressure filter of the kind described in Specification 322,091, [Class 46], using auxiliary filtering agents such as kieselguhr and fullers earth; the filter cake after being broken up can be repeatedly re-used. The acid may be cooled before the second filtration. If the acid to to be treated contains sulphur dioxide, this should be removed by blowing air or another inert gas into the acid prior to the process. The process is particularly applicable to acid of a concentration of greater than 70 per cent and removes impurities such as arsenic, selenium and copper. Examples are given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE773390X | 1933-06-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR773390A true FR773390A (en) | 1934-11-16 |
Family
ID=6684170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR773390D Expired FR773390A (en) | 1933-06-21 | 1934-05-17 | Sulfuric acid purification process |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR773390A (en) |
| GB (1) | GB422880A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0166469A2 (en) * | 1984-05-16 | 1986-01-02 | Metallgesellschaft Ag | Method for removing arsenic from waste sulphuric acid |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1159399B (en) * | 1959-10-22 | 1963-12-19 | Zieren Chemiebau Gmbh Dr A | Process for the removal of arsenic from sulfuric acid resulting from the purification of roast gases |
| CN112655858B (en) * | 2020-12-11 | 2023-05-26 | 威海市文登区道地参业发展有限公司 | Preparation method of American ginseng functional drink with anti-fatigue effect |
-
1934
- 1934-05-17 GB GB14936/34A patent/GB422880A/en not_active Expired
- 1934-05-17 FR FR773390D patent/FR773390A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0166469A2 (en) * | 1984-05-16 | 1986-01-02 | Metallgesellschaft Ag | Method for removing arsenic from waste sulphuric acid |
| EP0166469A3 (en) * | 1984-05-16 | 1986-12-30 | Metallgesellschaft Ag | Method for removing arsenic from waste sulphuric acid |
Also Published As
| Publication number | Publication date |
|---|---|
| GB422880A (en) | 1935-01-21 |
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