US4243555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for recovery of MG++ from brines
Assignee: Dow Chemical Co
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Filing: 1979-08-31
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Granted: 1981-01-06
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Expires: 1999-08-31
Abstract
Abstract Magnesium values are selectively recovered from salt brines, even salt brines which contain competing ions such as Li + , Ca ++ , and Sr ++ , by contacting the brine with an anion exchange resin which has dispersed therein a microcrystalline structure of the formula MgX 2 .2Al(OH) 3 , where X is a halide.
Inventors
- 👤 John M. Lee
- 👤 William C. Bauman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:41
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/08; B01J47/00; B01J47/016; C; C01; C01D; C01D3/00; C01D3/14; C01D3/145; C01F; C01F7/00; C01F7/78
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
16 words
A composition of matter comprising crystalline MgX 2 .2Al(OH) 3 , where X is a halide.
Claim 2
Dependent Claim
16 words
A composition of matter comprising crystalline MgX 2 .2Al(OH) 3 , where X is a halide.
Claim 3
Dependent Claim
17 words
The composition of claim 1 wherein the crystalline MgX 2 .2Al(OH) 3 is supported by a substrate.
Claim 4
Dependent Claim
14 words
The composite of claim 2 wherein the substrate is a reticular or porous solid.
Claim 5
Dependent Claim
15 words
The composition of claim 2 wherein the substrate is a reticular or porous polymeric material.
Claim 6
Dependent Claim
13 words
The composition of claim 1, 2, 3, or 4 wherein X is chloride.
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) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |