US4221767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of lithium from brines
Assignee: FMC Corp
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Filing: 1978-09-05
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Granted: 1980-09-09
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Expires: 1998-09-05
Abstract
Abstract An anion exchange resin, containing Al(OH) 3 suspended therein, is reacted with aq. LiOH to form microcrystalline LiOH.2Al(OH) 3 which is then reacted with a halogen acid or halide salt to form microcrystalline LiX.2Al(OH) 3 . The resin, after having a portion of the LiX eluted by using an aqueous wash, is used to recover Li + values from aqueous brines.
Inventors
- 👤 John M. Lee
- 👤 William C. Bauman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:56
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/08; B01J41/10; C; C01; C01D; C01D15/00; C01F; C01F7/00; C01F7/78; C22; C22B; C22B3/00; C22B3/20; C22B3/42; C01P; C01P2002/00; C01P2002/70; C01P2002/72; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
120 words
A process for recovering Li + values from brine, said process comprising 1. providing in an ion exchange column, a particulate anion exchange resin having dispersed therein a microcrystalline LiX·2Al(OH) 3 structure, where X is a halogen, 2. eluting a portion of the LiX from said resin by passing an aqueous wash through it, 3. flowing a Li + -containing brine through said resin until the resin is enriched to about its full capacity with LiX, 4. repeating steps 2 and 3, sequentially, a plurality of times, wherein the particulate anion exchange resin having dispersed therein a microcrystalline LiX·2Al(OH) 3 structure is one in which microcrystalline LiOH·2Al(OH) 3 , dispersed in said resin, has been converted to LiX·2Al(OH) 3 .
Claim 2
Dependent Claim
120 words
A process for recovering Li + values from brine, said process comprising 1. providing in an ion exchange column, a particulate anion exchange resin having dispersed therein a microcrystalline LiX·2Al(OH) 3 structure, where X is a halogen, 2. eluting a portion of the LiX from said resin by passing an aqueous wash through it, 3. flowing a Li + -containing brine through said resin until the resin is enriched to about its full capacity with LiX, 4. repeating steps 2 and 3, sequentially, a plurality of times, wherein the particulate anion exchange resin having dispersed therein a microcrystalline LiX·2Al(OH) 3 structure is one in which microcrystalline LiOH·2Al(OH) 3 , dispersed in said resin, has been converted to LiX·2Al(OH) 3 .
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein the aqueous wash of step 2 contains a small amount of LiX dissolved therein.
Claim 4
Dependent Claim
28 words
The process of claim 2 wherein the concentration of LiX in the aqueous wash is from about 50 to about 200 mg per liter, as Li + .
Claim 5
Dependent Claim
111 words
A process for recovering Li + values from brine, said process comprising 1. providing a particulate anion exchange resin having suspended therein a microcrystalline LiX·2Al(OH) 3 structure, where X is a halogen, which has had a portion of the LiX removed by elution, 2. contacting a Li + -containing brine with said resin, thereby enriching said resin with Li + values from said brine, and 3. separating said resin, now enriched with Li + values, from said brine, wherein the particulate anion exchange resin having suspended therein a microcrystalline LiX·2Al(OH) 3 structure is one in which microcrystalline LiOH·2Al(OH) 3 , suspended in said resin, has been converted to LiX·2Al(OH) 3 .
Claim 6
Dependent Claim
111 words
A process for recovering Li + values from brine, said process comprising 1. providing a particulate anion exchange resin having suspended therein a microcrystalline LiX·2Al(OH) 3 structure, where X is a halogen, which has had a portion of the LiX removed by elution, 2. contacting a Li + -containing brine with said resin, thereby enriching said resin with Li + values from said brine, and 3. separating said resin, now enriched with Li + values, from said brine, wherein the particulate anion exchange resin having suspended therein a microcrystalline LiX·2Al(OH) 3 structure is one in which microcrystalline LiOH·2Al(OH) 3 , suspended in said resin, has been converted to LiX·2Al(OH) 3 .
Claim 7
Dependent Claim
37 words
The process of claim 4 wherein the resin is recycled a plurality of times by taking the resin from step 3 and repeating steps 1, 2 and 3, sequentially, all this being done a plurality of times.
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) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |