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US4348295A
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Crystalline lithium aluminates
Assignee: FMC Corp
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Filing: 1980-12-18
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Granted: 1982-09-07
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Expires: 2000-12-18
Abstract
Abstract Crystalline hydrous aluminas, Al(OH) 3 , are reacted with LiX, where X is anion, under appropriate conditions to prepare crystalline compounds conforming substantially to the empirical formula LiX.2Al(OH).sub.3.nH.sub.2 O where X is anion and nH 2 O represents waters of hydration. Depending on the beginning hydrous alumina, some of the crystalline compounds are of a novel 2-layer unit cell structure and some of a 3-layer unit cell structure.
Inventors
- 👤 John L. Burba, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:41
CPC Classifications
C; C01; C01D; C01D15/00; B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/17; B01J41/00; B01J41/08; B01J41/10; B01J47/00; B01J47/018; C01F; C01F7/00; C01F7/02; C01F7/04; C01F7/043; C01F7/78; C01P; C01P2004/00; C01P2004/10; C01P2004/11
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
72 words
A process whereby crystalline hydrous alumina is converted to crystalline LiX.2Al(OH) 3 .nH 2 O, where nH 2 O indicates waters of hydration, and where X indicates anions which will form acids when in molecular combination with hydrogen or will form salts when in molecular combination with metal ions, said process comprising reacting the said alumina with a concentrated solution of LiX at an elevated temperature of at least about 85° C.
Claim 2
Dependent Claim
72 words
A process whereby crystalline hydrous alumina is converted to crystalline LiX.2Al(OH) 3 .nH 2 O, where nH 2 O indicates waters of hydration, and where X indicates anions which will form acids when in molecular combination with hydrogen or will form salts when in molecular combination with metal ions, said process comprising reacting the said alumina with a concentrated solution of LiX at an elevated temperature of at least about 85° C.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein the alumina is not supported on, or within, a solid substrate.
Claim 4
Dependent Claim
16 words
The process of claim 1 wherein the alumina is supported on, or within, a solid substrate.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein the alumina is within the pores of a porous substrate.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein the hydrous alumina is within the pores of a macroporous ion exchange resin.
Claim 7
Dependent Claim
24 words
The process of claim 1 wherein the LiX.2Al(OH) 3 .nH 2 O is converted to LiOH.2Al(OH) 3 .nH 2 O by reaction with LiOH.
Claim 8
Dependent Claim
26 words
The process of claim 1 wherein the alumina is gibbsite and the LiX.2Al(OH) 3 .nH 2 O reaction product is of the 2-layer unit cell variety.
Claim 9
Dependent Claim
28 words
The process of claim 1 wherein the alumina is bayerite, or nostrandite, and the LiX.2Al(OH) 3 .nH 2 O reaction product is of the 3-layer unit cell variety.
Claim 10
Dependent Claim
53 words
A composition of matter comprising crystalline LiX.2Al(OH) 3 .nH 2 O, where nH 2 O represents waters of hydration, X indicates anions which will form acids when in molecular combination with hydrogen or will form salts when in molecular combination with metal ions, said crystalline composition being of the 2-layer unit cell variety.
Claim 11
Dependent Claim
53 words
A composition of matter comprising crystalline LiX.2Al(OH) 3 .nH 2 O, where nH 2 O represents waters of hydration, X indicates anions which will form acids when in molecular combination with hydrogen or will form salts when in molecular combination with metal ions, said crystalline composition being of the 2-layer unit cell variety.
Claim 12
Dependent Claim
29 words
A composition of matter comprising crystalline LiOH.2Al(OH) 3 nH 2 O, where nH 2 O represents waters of hydration, said crystalline composition being of the 2-layer unit cell variety.
Claim 13
Dependent Claim
29 words
A composition of matter comprising crystalline LiOH.2Al(OH) 3 nH 2 O, where nH 2 O represents waters of hydration, said crystalline composition being of the 2-layer unit cell variety.
Claim 14
Dependent Claim
16 words
The composition of claim 9 or 10 when not supported on, or within, a solid substrate.
Claim 15
Dependent Claim
15 words
The composition of claim 9 or 10 when supported on, or within, a solid substrate.
Claim 16
Dependent Claim
16 words
The composition of claim 9 or 10 when supported within the pores of a porous substrate.
Claim 17
Dependent Claim
18 words
The composition of claim 9 or 10 when supported within the pores of a macroporous ion exchange resin.
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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) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |