US4540509A
Expired / Lapsed
US
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Crystalline 3-layer lithium aluminates
Assignee: FMC Corp
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Filing: 1982-08-30
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Granted: 1985-09-10
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Expires: 2002-08-30
Abstract
Abstract Ion exchange resins in the base form, e.g., DOWEX MWA--1--OH ion exchange resin, which contain crystalline Al(OH) 3 , e.g., gibbsite, and/or bayerite, and/or norstrandite, are treated with hot, concentrated LiX solutions (where X is anion) to prepare 3-layer crystalline LiX.2Al(OH) 3 .nH 2 O in the resin.
Inventors
- 👤 John L. Burba, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:59
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/04; B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/17; B01J41/00; B01J41/08; B01J41/10; B01J47/00; B01J47/018; C01D; C01D15/00; C01F7/78; C01P; C01P2004/00; C01P2004/10; C01P2004/11; Y; Y10; Y10S; Y10S502/00; Y10S502/514
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
77 words
A process for preparing crystalline 3-layer LiX.2Al(OH) 3 .nH 2 O in a macroporous ion exchange resin, said process comprising reacting a composite of a macroporous ion exchange resin, which is in its base form and which contains crystalline Al(OH) 3 dispersed therein, by mixing the said composite with hot, concentrated aqueous solution of LiX, where X is an anion, thereby converting the crystalline Al(OH) 3 in the resin to crystalline 3-layer LiX.2Al(OH) 3 .nH 2 O.
Claim 2
Dependent Claim
77 words
A process for preparing crystalline 3-layer LiX.2Al(OH) 3 .nH 2 O in a macroporous ion exchange resin, said process comprising reacting a composite of a macroporous ion exchange resin, which is in its base form and which contains crystalline Al(OH) 3 dispersed therein, by mixing the said composite with hot, concentrated aqueous solution of LiX, where X is an anion, thereby converting the crystalline Al(OH) 3 in the resin to crystalline 3-layer LiX.2Al(OH) 3 .nH 2 O.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the crystalline Al(OH) 3 is of the gibbsite and/or bayerite and/or norstrandite variety.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein the crystalline Al(OH) 3 is of the gibbsite variety.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein the hot LiX aqueous solution is at a temperature of at least about 70° C.
Claim 6
Dependent Claim
26 words
The process of claim 1 wherein the hot LiX aqueous solution is at a temperature in the range of about 85° C. to about 120° C.
Claim 7
Dependent Claim
26 words
The process of claim 1 wherein the concentration of the LiX in the aqueous solution is at least about 20% of the saturation concentration by weight.
Claim 8
Dependent Claim
28 words
The process of claim 1 wherein the LiX in the aqueous solution is LiCl and the concentration of the LiCl solution is at least about 8% by weight.
Claim 9
Dependent Claim
71 words
A process for preparing crystalline 3-layer LiCl2Al(OH) 3 .nH 2 O in a macroporous ion exchange resin, said process comprising reacting a composite of a macroporous ion exchange resin, which is in its base form and which contains gibbsite dispersed therein, with a hot, concentrated aqueous solution of LiCl by mixing said composite and said solution, thereby converting said gibbsite in said resin to crystalline 3-layer LiCl2Al(OH) 3 .nH 2 O.
Claim 10
Dependent Claim
71 words
A process for preparing crystalline 3-layer LiCl2Al(OH) 3 .nH 2 O in a macroporous ion exchange resin, said process comprising reacting a composite of a macroporous ion exchange resin, which is in its base form and which contains gibbsite dispersed therein, with a hot, concentrated aqueous solution of LiCl by mixing said composite and said solution, thereby converting said gibbsite in said resin to crystalline 3-layer LiCl2Al(OH) 3 .nH 2 O.
Claim 11
Dependent Claim
19 words
The process of claim 8 wherein the LiCl solution is at a temperature of at least about 70° C.
Claim 12
Dependent Claim
25 words
The process of claim 8 wherein the LiCl solution is at at temperature in the range of about 85° C. to about 120 ° C.
Claim 13
Dependent Claim
26 words
The process of claim 8 wherein the concentration of the LiCl in the aqueous solution is at least about 20% of the saturation concentration by weight.
Claim 14
Dependent Claim
22 words
The process of claim 8 wherein the concentration of the LiCl in the aqueous solution is at least about 8% by weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |