GB1016496A - Improvements in or relating to the purification of hydrofluoric acid - Google Patents
Improvements in or relating to the purification of hydrofluoric acidInfo
- Publication number
- GB1016496A GB1016496A GB2740762A GB2740762A GB1016496A GB 1016496 A GB1016496 A GB 1016496A GB 2740762 A GB2740762 A GB 2740762A GB 2740762 A GB2740762 A GB 2740762A GB 1016496 A GB1016496 A GB 1016496A
- Authority
- GB
- United Kingdom
- Prior art keywords
- purification
- relating
- hydrofluoric acid
- kmno4
- arsenic
- 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
- C01B7/00—Halogens; Halogen acids
- C01B7/19—Fluorine; Hydrogen fluoride
- C01B7/191—Hydrogen fluoride
- C01B7/195—Separation; Purification
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/19—Fluorine; Hydrogen fluoride
- C01B7/191—Hydrogen fluoride
- C01B7/195—Separation; Purification
- C01B7/196—Separation; Purification by distillation
Abstract
Arsenic and/or antimony impurities in HF produced by acidification of fluorite are oxidized to fluoarsenate and/or fluoantimonate by KMnO4, K2Cr2O7, PbO2, H2SO5 or peroxides in the presence of alkali metal ion and pure HF is distilled from the product; the alkali metal ion may be a constituent of the oxidizing agent or added, e.g. as KF. The arsenic and/or antimony content of HF may thus be reduced from 0.0005-0.1% to less than 0.0003%, e.g. to 0.0001%. In an example 500 kg. anhydrous MF containing 5g. each As, Sb (0.001%) was stirred with 100 g. fine KMnO4 (0.02%) in an iron boiler and distilled yielding 480 kg. HF containing 0.29 g. As (0.00006%) and 0.48 g. Sb (0.0001%) and 20 kg. residue containing 4.70 g. As, 4.50 g. Sb.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT1386561 | 1961-07-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1016496A true GB1016496A (en) | 1966-01-12 |
Family
ID=11144703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2740762A Expired GB1016496A (en) | 1961-07-27 | 1962-07-17 | Improvements in or relating to the purification of hydrofluoric acid |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE620698A (en) |
| GB (1) | GB1016496A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0351107A1 (en) * | 1988-07-11 | 1990-01-17 | AlliedSignal Inc. | Manufacture of high purity low arsenic anhydrous hydrogen fluoride |
-
0
- BE BE620698D patent/BE620698A/xx unknown
-
1962
- 1962-07-17 GB GB2740762A patent/GB1016496A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0351107A1 (en) * | 1988-07-11 | 1990-01-17 | AlliedSignal Inc. | Manufacture of high purity low arsenic anhydrous hydrogen fluoride |
| WO1990000521A1 (en) * | 1988-07-11 | 1990-01-25 | Allied-Signal Inc. | Manufacture of high purity low arsenic anhydrous hydrogen fluoride |
Also Published As
| Publication number | Publication date |
|---|---|
| BE620698A (en) |
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