GB357630A - - Google Patents
Info
- Publication number
- GB357630A GB357630A GB1946330A GB1946330A GB357630A GB 357630 A GB357630 A GB 357630A GB 1946330 A GB1946330 A GB 1946330A GB 1946330 A GB1946330 A GB 1946330A GB 357630 A GB357630 A GB 357630A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per
- mesh
- acids
- amps
- cathodes
- 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
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/234—Purification; Stabilisation; Concentration
- C01B25/237—Selective elimination of impurities
- C01B25/238—Cationic impurities, e.g. arsenic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
357,630. Electrolytic purification of liquids. I. G. FARBENINDUSTRIE AKT.-GES., Frankfort-on-Main, Germany. June 26, 1930, No. 19463. Convention date, June 28, 1929. [Class 41.] Liquids, such as acids or salt solutions, containing dissolved inorganic impurities in very low concentrations, are purified by slow passage through perforated electrodes. In an example, phosphoric acid of strength 80-90 per cent, containing 20 mgm. per litre of arsenic trioxide and traces of heavy metal salts is passed at the rate of 4 cms. per hour through cathodes of single or multiple copper gauze of mesh 450 per sq. cm. which occupy the cross section of a trough. The anodes are of platinum wire. The cathode current density is 0À0001 amps per sq. cm., and that at the anode is between 0À01 and 0À1, e.g. 0À06, amps per sq. cm. Arsenic is deposited in spongy metallic form and is filtered off. The finer the mesh the higher the degree of purification. Small amounts of phosphorous and hypophosphorous acids contained in phosphoric acid are oxidized by passage through anodes of mesh 5000 per sq. cm with an anodic current density of 0À001 amps per sq. cm. Detailed examples are also given of the de-arsenification of sulphuric and acetic acids and also the removal of mercury from acetic acid. In these, cathodes of mesh 10000 per sq. cm. are employed. Lead may be deposited from nitric acid or nitrate solutions as metal at the cathode and as peroxide at the anode.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI38539D DE542781C (en) | 1929-06-29 | 1929-06-29 | Process for the electrolytic cleaning of solutions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB357630A true GB357630A (en) | 1931-09-28 |
Family
ID=7189803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1946330A Expired GB357630A (en) | 1929-06-29 | 1930-06-26 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE371545A (en) |
| DE (1) | DE542781C (en) |
| GB (1) | GB357630A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008152117A2 (en) * | 2007-06-12 | 2008-12-18 | Buss Chemtech Ag | Process and apparatus for reducing arsenic in an acidic liquid1 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1052569A (en) * | 1964-11-30 | |||
| CA931110A (en) * | 1969-03-11 | 1973-07-31 | A. Carlson Gordon | Recovery of metals from solution |
| JP2650065B2 (en) * | 1989-08-21 | 1997-09-03 | ペルメレック電極株式会社 | Recovery method of sulfuric acid |
-
0
- BE BE371545D patent/BE371545A/xx unknown
-
1929
- 1929-06-29 DE DEI38539D patent/DE542781C/en not_active Expired
-
1930
- 1930-06-26 GB GB1946330A patent/GB357630A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008152117A2 (en) * | 2007-06-12 | 2008-12-18 | Buss Chemtech Ag | Process and apparatus for reducing arsenic in an acidic liquid1 |
| WO2008152117A3 (en) * | 2007-06-12 | 2009-03-26 | Buss Chemtech Ag | Process and apparatus for reducing arsenic in an acidic liquid1 |
Also Published As
| Publication number | Publication date |
|---|---|
| BE371545A (en) | |
| DE542781C (en) | 1932-01-29 |
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