US3723267A
Expired / Lapsed
US
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Method of producing high purity antimony from antimony trioxide obtained by burning refined metal
Assignee: SRED AZ NI PI TSVETNOI METALLU
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Filing: 1971-01-05
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Granted: 1973-03-27
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Expires: 1991-01-05
Abstract
Abstract A method of producing antimony having a total amount of impurities of not higher than 0.01 percent which comprises treating antimony trioxide with an aqueous alkaline solution of glycerine to obtain a solution enriched in antimony and subjecting the solution to electrolysis whereby high-purity antimony is electrodeposited on a cathode. This method makes possible an increase in the extraction of high purity antimony by as much as 30 percent.
Inventors
- 👤 P Baiborodov
- 👤 A Ezhkov
- 👤 N Kolbin
- 👤 A Uvarova
- 👤 I Gerasimov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:28
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
30 words
A method of claim 1 wherein the aqueous-alkaline solution of glycerine contains 250 to 300 grams of glycerine per liter and 50 to 80 grams of caustic soda per liter.
Claim 2
Dependent Claim
35 words
A method of claim 1 wherein said antimony trioxide is treated with the aqueous-alkaline solution of glycerine at a temperature of 60* to 70*C with stirring for a period of from 30 to 40 minutes.
Claim 3
Dependent Claim
37 words
A method of claim 1 wherein the process of electrolysis is conducted in an electrolytic cell made of an alkaline medium-resisting material and having anodes manufactured from pure graphite and cathodes manufactured from high-purity antimony or graphite.
Claim 4
Dependent Claim
26 words
A method of claim 4 wherein the process of electrolysis is conducted in an electrolyte having an antimony concentration of about 60 grams per liter minimum.
Claim 5
Dependent Claim
22 words
A method of claim 1 wherein the process of electrolysis is conducted at a cathode current density of 300 to 500 A/sq.m.
Claim 6
Dependent Claim
61 words
A method of claim 1 wherein the antimony trioxide, in which the content of arsenic exceeds 0.01 percent, is pre-treated with dilute nitric acid at a temperature of 70* to 80*C with stirring, followed by allowing the sediment to settle, decanting the arsenic-containing solution, washing the antimony trioxide sediment with wateR, and subjecting the resulting arsenic-free antimony trioxide to said treatment.
Claim 7
Dependent Claim
76 words
In a method of recovering the high-purity antimony from antimony trioxide containing about 99.9 percent antimony obtained by burning refined metal, the steps comprising treating said antimony trioxide with an aqueous-alkaline solution of glycerine to obtain a solution enriched in antimony, separating the resultant solution, and subjecting said solution to electrolysis in a cell provided with pure graphite anodes and high purity antimony cathodes to effect the deposition on the cathode and recovering high purity antimony.
References Cited (Backward Citations)
CA736928A
Cited
US2817628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |