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US4477367A
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Crystalline 2-layer lithium-hydroxy aluminates
Assignee: FMC Corp
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Filing: 1982-08-30
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Granted: 1984-10-16
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Expires: 2002-08-30
Abstract
Abstract Crystalline 2-layer LiOH.2Al(OH) 3 .nH 2 O, preferably supported by a porous substrate, is prepared by treating crystalline 2-layer LiX.2Al(OH) 3 .nH 2 O, where X is anion, with a LiOH solution or other hydroxide ion source. The so-formed crystalline 2-layer LiOH.2Al(OH) 3 .nH 2 O is particularly suitable for exchange of the OH ion with larger X' ions to produce other crystalline 2-layer LiX'.2Al(OH) 3 .nH 2 O.
Inventors
- 👤 John L. Burba, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:43
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; C01F7/78; C01P; C01P2004/00; C01P2004/10; C01P2004/11; Y; Y10; Y10S; Y10S502/00; Y10S502/514
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
69 words
A process for preparing crystalline 2-layer LiOH.2Al(OH) 3 .nH 2 O, said process comprising contacting crystalline 2-layer LiX.2Al(OH) 3 .nH 2 O with an aqueous solution of LiOH, or other hydroxide ion source, at a temperature in the range of about 15° C. to about 70° C., where X is halide, thereby exchanging OH - ions for X - ions and forming crystalline 2-layer LiOH.2Al(OH) 3 .nH 2 O.
Claim 2
Dependent Claim
69 words
A process for preparing crystalline 2-layer LiOH.2Al(OH) 3 .nH 2 O, said process comprising contacting crystalline 2-layer LiX.2Al(OH) 3 .nH 2 O with an aqueous solution of LiOH, or other hydroxide ion source, at a temperature in the range of about 15° C. to about 70° C., where X is halide, thereby exchanging OH - ions for X - ions and forming crystalline 2-layer LiOH.2Al(OH) 3 .nH 2 O.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein the concentration of the LiOH solution, or other hydroxide ion source, is in the range of about 5% to about saturation.
Claim 4
Dependent Claim
89 words
A process for replacing the X anion of crystalline 2-layer LiX.2Al(OH) 3 .nH 2 O with a larger anion, X', said process comprising reacting the LiX.2Al(OH) 3 .nH 2 O with LiOH, or other hydroxide ion source, at a temperature in the range of about 0° C. to about 100° C., thereby forming crystalline 2-layer LiOH.2Al(OH) 3 .nH 2 O, and reacting the so-formed LiOH.2Al(OH) 3 .nH 2 O with an acid or salt form of the larger X' anion, thereby forming crystalline 2-layer LiX'.2Al(OH) 3 .nH 2 O.
Claim 5
Dependent Claim
89 words
A process for replacing the X anion of crystalline 2-layer LiX.2Al(OH) 3 .nH 2 O with a larger anion, X', said process comprising reacting the LiX.2Al(OH) 3 .nH 2 O with LiOH, or other hydroxide ion source, at a temperature in the range of about 0° C. to about 100° C., thereby forming crystalline 2-layer LiOH.2Al(OH) 3 .nH 2 O, and reacting the so-formed LiOH.2Al(OH) 3 .nH 2 O with an acid or salt form of the larger X' anion, thereby forming crystalline 2-layer LiX'.2Al(OH) 3 .nH 2 O.
Claim 6
Dependent Claim
82 words
The process of claim 3 where the X anion is at least one of the group comprising chloride, bromide, and iodide and the X' anion is at least one of the group comprising NO 3 - , H 2 PO 4 - , HPO 4 -2 , PO 4 -3 , HCOO - , CClH 2 COO - , CCl 2 HCOO - , CCL 3 COO - , CH 2 CHCOO - , and C 6 H 5 O - .
Claim 7
Dependent Claim
42 words
The process of claim 3 wherein the concentration of the LiOH solution, or other hydroxide ion source, is in the range of about 5% to about saturation and the temperature is in the range of about 15° C. to about 70° C.
Claim 8
Dependent Claim
17 words
The process of claim 3 wherein the LiX.2Al(OH) 3 .nH 2 O is supported by a substrate.
Claim 9
Dependent Claim
21 words
The process of claim 3 wherein the LiX.2Al(OH) 3 .nH 2 O is supported within the pores of a porous substrate.
Claim 10
Dependent Claim
23 words
The process of claim 3 wherein the LiX.2Al(OH) 3 .nH 2 O is supported within the pores of a macroporous ion exchange resin.
Claim 11
Dependent Claim
35 words
The process of claim 3 wherein the LiX.2Al(OH) 3 .nH 2 O is supported within the pores of a macroporous beads comprising a copolymer of styrene and divinylbenzene having pendant amine or quaternary ammonium groups.
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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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |