US4376100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithium halide brine purification
Assignee: FMC Corp
•
Filing: 1981-11-23
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Granted: 1983-03-08
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Expires: 2001-11-23
Abstract
Abstract A resin/aluminate composite which has been substantially loaded with Li + values by being contacted with a contaminated, Li + -containing aqueous solution, is pre-washed with a substantially pure, concentrated NaCl brine to remove the contaminants without removing the Li + values, then is washed with water to leach out much, but not all, of the Li + values. The resin/aluminate composite comprises a macroporous anion exchange resin having crystalline LiX.2Al(OH) 3 dispersed therein, where X is halide.
Inventors
- 👤 John M. Lee
- 👤 William C. Bauman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:58
CPC Classifications
C; C01; C01D; C01D15/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
113 words
A method for leaching Li + values from a macroporous resin/aluminate composite which contains contaminated brine, said resin/aluminate composite comprisng an anion exchange resin having crystalline LiX.2Al(OH) 3 dispersed therein, where X is halide, and being substantially loaded with respect to Li + values, said method comprising a pre-wash of the composite with a substantially pure contaminant free, concentrated alkali metal halide solution to substantially wash the contaminated brine from the composite without significantly removing Li + values, and water-leaching the substantially pure alkali metal halide solution and a substantial amount of Li + values from the composite, leaving the composite substantially unloaded, but not completely unloaded, with respect to Li + values.
Claim 2
Independent Claim
113 words
A method for leaching Li + values from a macroporous resin/aluminate composite which contains contaminated brine, said resin/aluminate composite comprisng an anion exchange resin having crystalline LiX.2Al(OH) 3 dispersed therein, where X is halide, and being substantially loaded with respect to Li + values, said method comprising a pre-wash of the composite with a substantially pure contaminant free, concentrated alkali metal halide solution to substantially wash the contaminated brine from the composite without significantly removing Li + values, and water-leaching the substantially pure alkali metal halide solution and a substantial amount of Li + values from the composite, leaving the composite substantially unloaded, but not completely unloaded, with respect to Li + values.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the concentrated alkali metal halide solution used for the pre-wash contains a minor amount of Li halide.
Claim 4
Dependent Claim
14 words
The method of claim 2 wherein the alkali metal halide solution is NaCl solution.
Claim 5
Dependent Claim
11 words
The method of claim 3 wherein the NaCl solution is saturated.
Claim 6
Dependent Claim
41 words
The method of claim 2 wherein the alkali metal halide solution, which contains a minor amount of Li halide, is prepared by adding NaCl to at least a portion of the eluate from the water-leaching step of a previous loading-unloading cycle.
Claim 7
Dependent Claim
11 words
The method of claim 5 wherein the NaCl solution is saturated.
Claim 8
Dependent Claim
27 words
The method of claim 2 in which the Li halide is derived from the pre-wash step and/or the water-leaching step of at least one previous loading-unloading cycle.
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein the alkali metal halide solution is sodium chloride.
Claim 10
Dependent Claim
23 words
The method of claim 8 wherein the concentration of the sodium chloride solution is in the range of about 20% to about 26%.
Claim 11
Dependent Claim
9 words
The method of claim 1 wherein X is chloride.
Claim 12
Dependent Claim
13 words
The method of claim 1 wherein the alkali metal halide solutions is saturated.
Claim 13
Dependent Claim
21 words
The method of claim 1 wherein the water used for the water-leaching contains at least about 80 ppm Li + .
Claim 14
Dependent Claim
26 words
The method of claim 1 wherein the substantially unloaded composite is reloaded with Li + values by being contacted with a Li + -containing contaminated brine.
References Cited (Backward Citations)
US4291001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-07 | 1986-09-06 | 1987-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-07 | 1990-09-06 | 1991-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-07 | 1994-09-06 | 1995-03-08 | $7700.00 | Window Closed / Lapsed |