US4369166A
Expired / Lapsed
US
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Purification of solutions of gallium values by liquid/liquid extraction
Assignee: Rhone Poulenc Industries SA
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Filing: 1981-11-30
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Granted: 1983-01-18
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Expires: 2001-11-30
Abstract
Abstract Highly pure (>99.99%) aqueous solutions of gallium chloride are obtained by (i) liquid/liquid extracting an aqueous hydrochloric acid solution of gallium values with an organic phase which comprises an alcohol extractant, (ii) separating the organic phase from the aqueous phase, (iii) selectively washing said organic phase by intimately contacting same with water or with an aqueous solution of hydrochloric acid, (iv) next transferring the purified gallium values from said organic phase into an aqueous solution thereof, and (v) thence separating said organic phase from said resulting aqueous phase, whereby said aqueous phase comprises pure gallium chloride.
Inventors
- 👤 Alain Leveque
- 👤 Michel Triollier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:22
CPC Classifications
C; C01; C01G; C01G15/00; C01G15/003; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/262; C22B3/28; C22B3/288; C22B58/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
103 words
A process for the purification of an aqueous hydrochloric acid solution of gallium values by liquid/liquid extraction, comprising (i) liquid/liquid extracting an aqueous hydrochloric acid solution of gallium values with an organic phase which comprises an alcohol extractant, (ii) separating the organic phase from the aqueous phase, (iii) selectively washing said organic phase by intimately contacting same with water or with an aqueous solution of hydrochloric acid, (iv) next transferring the purified gallium values from said organic phase into an aqueous solution thereof, and (v) thence separating said organic phase from said resulting aqueous phase, whereby said aqueous phase comprises pure gallium chloride.
Claim 2
Dependent Claim
103 words
A process for the purification of an aqueous hydrochloric acid solution of gallium values by liquid/liquid extraction, comprising (i) liquid/liquid extracting an aqueous hydrochloric acid solution of gallium values with an organic phase which comprises an alcohol extractant, (ii) separating the organic phase from the aqueous phase, (iii) selectively washing said organic phase by intimately contacting same with water or with an aqueous solution of hydrochloric acid, (iv) next transferring the purified gallium values from said organic phase into an aqueous solution thereof, and (v) thence separating said organic phase from said resulting aqueous phase, whereby said aqueous phase comprises pure gallium chloride.
Claim 3
Dependent Claim
20 words
The process as defined by claim 1, said alcohol extractant being a hydrocarbinol having from 4 to 10 carbon atoms.
Claim 4
Dependent Claim
29 words
The process as defined by claim 2, said alcohol extractant being selected from the group consisting of pentanol, n-butanol, isobutanol, cyclohexanol, n-hexanol, 2-ethylhexanol, n-heptanol, n-octanol, isooctanol, n-decanol and isodecanol.
Claim 5
Dependent Claim
13 words
The process as defined by claim 3, said alcohol extractant comprising undiluted 2-ethylhexanol.
Claim 6
Dependent Claim
24 words
The process as defined by claim 1, said organic phase being (iii) selectively washed with a less than 6 M solution of hydrochloric acid.
Claim 7
Dependent Claim
27 words
The process as defined by claim 1, said starting aqueous hydrochloric acid solution of gallium having a free HCl acidity ranging from 1 to about 8 N.
Claim 8
Dependent Claim
21 words
The process as defined by claim 6, said starting solution having a free HCl acidity ranging from 2 to 6 N.
Claim 9
Dependent Claim
17 words
The process as defined by claim 6, said starting solution further comprising sulfuric acid or perchloric acid.
Claim 10
Dependent Claim
50 words
The process as defined by claim 1, said starting aqueous hydrochloric acid solution of gallium comprising at least one of the metal cations of calcium, magnesium, aluminum, vanadium, chromium, copper, manganese, sodium, zinc, cobalt, nickel, lead, cadmium, indium, barium, strontium, potassium, titanium, lanthanides, yytrium, arsenic, iron, phosphorus, tin and boron.
Claim 11
Dependent Claim
24 words
The process as defined by claim 9, the concentration of gallium in said starting solution ranging from about 500 mg/liter to about 300 g/liter.
Claim 12
Dependent Claim
13 words
The process as defined by claim 9, said starting solution comprising ferric iron.
Claim 13
Dependent Claim
39 words
The process as defined by claim 1, said organic phase comprising a diluent selected from the group consisting of heptane, dodecane, hexane, petroleum cut of kerosene type, benzene, toluene, ethylbenzene, xylene, cut of Solvesso type, chloroform and carbon tetrachloride.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |