US4665044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pillared and delaminated clays containing iron
Assignee: Michigan State University
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Filing: 1985-04-16
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Granted: 1987-05-12
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Expires: 2005-04-16
Abstract
Abstract A process for preparing a stable pillared layered lattice clay, comprising the steps of preparing a hydrolyzed solution of ferric ion by reacting a solution of a salt of the said metal with a base at temperatures in the range of 22 DEG to 28 DEG C. and aging the solution within said temperature range to develop the hydrolyzed pillaring agent, contacting an aqueous slurry of a layer lattice clay selected from the group consisting of smectites, vermiculite, and flurohectorite, with said hydrolyzed solution, and recovering the intercalated pillared clay product. The resultant pillared clay product has a unit clay cell containing from 6.1 to 9.8 ferric ions per cell, and has a repeating spacing of from about 22 to 28 Angstroms. The product is particularly useful in catalyzing conversion processes such as the well-known Fischer-Tropsch process.
Inventors
- 👤 Thomas J. Pinnavaia
- 👤 Ming S. Tzou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:15
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/049; B01J21/00; B01J21/16; B01J23/00; B01J23/16; B01J23/24; B01J23/26
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
92 words
A process for preparing a stable pillared layered lattice clay, comprising the steps of: (a) preparing a hydrolyzed solution of ferric ion by reacting a solution of a salt of the said metal with a base at temperatures in the range of 22° to 28° C. and aging the solution within said temperature range to develop the hydrolyzed pillaring agent; (b) contacting an aqueous slurry of a layer lattice clay selected from the group consisting of smectites, vermiculite, and flurohectorite, with said hydrolyzed solution; and (c) recovering the intercalated pillared clay product.
Claim 2
Dependent Claim
92 words
A process for preparing a stable pillared layered lattice clay, comprising the steps of: (a) preparing a hydrolyzed solution of ferric ion by reacting a solution of a salt of the said metal with a base at temperatures in the range of 22° to 28° C. and aging the solution within said temperature range to develop the hydrolyzed pillaring agent; (b) contacting an aqueous slurry of a layer lattice clay selected from the group consisting of smectites, vermiculite, and flurohectorite, with said hydrolyzed solution; and (c) recovering the intercalated pillared clay product.
Claim 3
Dependent Claim
22 words
A method in accordance with claim 1, wherein said base is selected from the group consisting of sodium carbonate and sodium bicarbonate.
Claim 4
Dependent Claim
29 words
A method in accordance with claim 2, wherein said salt is selected from one or more members of the group consisting of ferric chloride, ferric nitrate, and ferric perchlorate.
Claim 5
Dependent Claim
21 words
A method in accordance with claim 3, wherein said base is added as a solid to a solution of said salt.
Claim 6
Dependent Claim
16 words
A method in accordance with claim 4, wherein said temperatures are maintained at about 25° C.
Claim 7
Independent Claim
25 words
A method in accordance with any of claims 1, 2, 3 or 4, wherein said aging is carried out from 1.5 hours to 7 days.
Claim 8
Independent Claim
24 words
A method in accordance with any of claims 1, 2, 3 or 4, wherein said aging is carried out from 8 to 16 hours.
Claim 9
Independent Claim
22 words
A method in accordance with any of claims 1, 2, 3 or 4, wherein said intercalated pillared product is recovered by centrifuging.
Claim 10
Independent Claim
23 words
A method in accordance with any of claims 1, 2, 3 or 4, wherein said product recovered by centrifuging is washed and air-dried.
Claim 11
Dependent Claim
30 words
A method in accordance with claim 1, wherein the concentration of metal ion in step (b), is at least 6 ions per equivalent of a said clay in the slurry.
Claim 12
Dependent Claim
36 words
A method in accordance with claim 10, wherein the concentration of ferric ion in step (b), is sufficient to provide a unit cell containing from 6.1 to 9.8 ferric ions per cell, based on chemical analysis.
Claim 13
Dependent Claim
41 words
A pillared clay selected from the group consisting of smectites, flurohectorite and vermiculite, intercalated with iron polyoxycations to provide a unit cell containing from 6.1 to 9.8 ferric ions per cell, and having a repeating spacing of at least 22 Angstroms.
Claim 14
Dependent Claim
41 words
A pillared clay selected from the group consisting of smectites, flurohectorite and vermiculite, intercalated with iron polyoxycations to provide a unit cell containing from 6.1 to 9.8 ferric ions per cell, and having a repeating spacing of at least 22 Angstroms.
Claim 15
Dependent Claim
21 words
A product in accordance with claim 12, wherein the repeating spacing is in a range of from 22 to 28 Angstroms.
Claim 16
Dependent Claim
24 words
A pillared clay product in accordance with claim 13, wherein the surface area of said product is at least 240 square meters per gram.
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) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |