US4461714A
Expired / Lapsed
US
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Method of making crystalline 2-layer lithium aluminates in ion exchange resins
Assignee: FMC Corp
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Filing: 1982-08-30
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Granted: 1984-07-24
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Expires: 2002-08-30
Abstract
Abstract The bayerite form of crystalline alumina, Al(OH) 3 , contained within a macroporous ion exchange resin is converted to the gibbsite form of Al(OH) 3 by reaction with hot MgX 2 , where X is halide, followed by water-washing the MgX 2 portion from the product, thereby causing the conversion of bayerite to the gibbsite form of crystalline Al(OH) 3 . The gibbsite form may then be reacted with hot LiX solution, where X is anion, to form 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
2026-11-04 10:29
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; C01F7/784; C01P; C01P2004/00; C01P2004/10; C01P2004/11; Y; Y10; Y10S; Y10S502/00; Y10S502/514
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
65 words
A process for converting crystalline hydrous alumina, Al(OH) 3 , bayerite, dispersed within a macroporous ion exchange resin to the gibbsite form, said process comprising reacting the bayerite/resin composite with a MgX 2 solution, where X is halide, at elevated temperature, and water-washing the MgX 2 portion from the so-formed product, thereby causing the formation of the gibbsite form of Al(OH) 3 in the resin.
Claim 2
Dependent Claim
65 words
A process for converting crystalline hydrous alumina, Al(OH) 3 , bayerite, dispersed within a macroporous ion exchange resin to the gibbsite form, said process comprising reacting the bayerite/resin composite with a MgX 2 solution, where X is halide, at elevated temperature, and water-washing the MgX 2 portion from the so-formed product, thereby causing the formation of the gibbsite form of Al(OH) 3 in the resin.
Claim 3
Dependent Claim
28 words
The process of claim 1 wherein the elevated temperature for reaction with MgX 2 is a temperature in the range of about 100° C. to about 150° C.
Claim 4
Dependent Claim
26 words
The process of claim 1 wherein the concentration of the MgX 2 solution, at the start, is in the range of about 24% to about 40%.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein the MgX 2 is MgCl 2 .
Claim 6
Dependent Claim
26 words
The process of claim 1 wherein the resin comprises macroporous beads of a crosslinked copolymer of styrene and divinylbenzene having pendant amine or quaternary ammonium groups.
Claim 7
Dependent Claim
94 words
A process for preparing crystalline 2-layer LiX.2Al(OH) 3 .nH 2 O, where X is anion and nH 2 O represents waters of hydration, said process comprising reacting bayerite, dispersed within a macroporous ion exchange resin, with a MgX 2 solution, where X is halide, at elevated temperature, then water-washing the MgX 2 portion from the so-formed product, thereby causing the formation of gibbsite from the bayerite in the resin, then reacting the so-sormed gibbsite with hot LiX solution, where X is anion, thereby converting the gibbsite to crystalline 2-layer LiX.Al(OH) 3 .nH 2 O.
Claim 8
Dependent Claim
94 words
A process for preparing crystalline 2-layer LiX.2Al(OH) 3 .nH 2 O, where X is anion and nH 2 O represents waters of hydration, said process comprising reacting bayerite, dispersed within a macroporous ion exchange resin, with a MgX 2 solution, where X is halide, at elevated temperature, then water-washing the MgX 2 portion from the so-formed product, thereby causing the formation of gibbsite from the bayerite in the resin, then reacting the so-sormed gibbsite with hot LiX solution, where X is anion, thereby converting the gibbsite to crystalline 2-layer LiX.Al(OH) 3 .nH 2 O.
Claim 9
Dependent Claim
28 words
The process of claim 6 wherein the elevated temperature for reaction with MgX 2 is a temperature in the range of about 100° C. to about 150° C.
Claim 10
Dependent Claim
26 words
The process of claim 6 wherein the concentration of the MgX 2 solution, at the start, is in the range of about 24% to about 40%.
Claim 11
Dependent Claim
13 words
The process of claim 6 wherein the MgX 2 is MgCl 2 .
Claim 12
Dependent Claim
25 words
The process of claim 6 wherein the resin comprises macroporous beads of a crosslinked copolymer of styrene and divinylbenzene having pendant amine or quaternary groups.
Claim 13
Dependent Claim
32 words
The process of claim 6 wherein the X anion of the Lix solution is an anion of a halo acid, excluding F, a mineral acid or inorganic acid, or an organic acid.
Claim 14
Dependent Claim
41 words
The process of claim 6 wherein the LiX solution is at least one of the lithium salts of the group comprising LiCl, LiBr, LiI, LiNO 3 , LiClO 4 , LiClO, LiSCN, LiOOCH, and LiC 2 H 3 O 2 .
Claim 15
Dependent Claim
22 words
The process of claim 6 wherein the X anion of the LiX solution is the anion of a halo acid, excluding F.
Claim 16
Dependent Claim
20 words
The process of claim 6 wherein the X anion of the LiX solution is the anion of a mineral acid.
Claim 17
Dependent Claim
20 words
The process of claim 6 wherein the X anion of the LiX solution is the anion of an inorganic acid.
Claim 18
Dependent Claim
20 words
The process of claim 6 wherein the X anion of the LiX solution is the anion of an organic acid.
Claim 19
Dependent Claim
10 words
The process of claim 6 wherein the LiX is LiCl.
Claim 20
Dependent Claim
10 words
The process of claim 6 wherein the LiX is LiOOCH.
Claim 21
Dependent Claim
16 words
The process of claim 6 wherein the LiX is LiC 2 H 3 O 2 .
Claim 22
Dependent Claim
25 words
The process of claim 6 wherein the hot LiX solution is at a temperature in the range of about 85° C. to about 120° C.
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) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |