US4347327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of lithium from brines
Assignee: FMC Corp
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Filing: 1979-11-19
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Granted: 1982-08-31
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Expires: 1999-11-19
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
2026-11-03 04:00
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: 11
Claim 1
Independent Claim
13 words
A particulate anion exchange resin having suspended therein a microcrystalline LiOH.2Al(OH) 3 structure.
Claim 2
Dependent Claim
13 words
A particulate anion exchange resin having suspended therein a microcrystalline LiOH.2Al(OH) 3 structure.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein the resin is a macroporous resin.
Claim 4
Dependent Claim
37 words
The composition of claim 2 wherein the macroporous resin is at least one of the group comprising water-insoluble, water-swellable anion exchange resin particles of polystyrene crosslinked with divinylbenzene and having affixed thereto amine or quaternary ammonium groups.
Claim 5
Dependent Claim
13 words
A particulate anion exchange resin having suspended therein amorphous or crystalline hydrous alumina.
Claim 6
Dependent Claim
13 words
A particulate anion exchange resin having suspended therein amorphous or crystalline hydrous alumina.
Claim 7
Dependent Claim
11 words
The composition of claim 4 wherein the hydrous alumina is amorphous.
Claim 8
Dependent Claim
11 words
The composition of claim 4 wherein the hydrous alumina is crystalline.
Claim 9
Dependent Claim
37 words
The composition of claim 4 when prepared in accordance with the process which comprises incorporating an aluminum salt into the resin, and converting said aluminum salt to hydrous alumina by contacting it with aqueous NH 3 .
Claim 10
Dependent Claim
46 words
The composition of claim 4 when prepared in accordance with the process which comprises providing the resin with an aluminate compound suspended therein, and aqueous leaching the aluminate to substantially remove leachable portions of the aluminate compound, leaving a residue of hydrous alumina in the resin.
Claim 11
Dependent Claim
42 words
The composition of claim 4 wherein the anion exchange resin is a macroporous anion exchange resin comprising at least one of the group consisting of water-insoluble, water-swellable particles of polystyrene crosslinked with divinylbenzene and having affixed thereto amine or quaternary ammonium groups.
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) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |