US4637992A
Expired / Lapsed
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Intercalated clay compositions
Assignee: Shell USA Inc
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Filing: 1984-12-17
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Granted: 1987-01-20
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Expires: 2004-12-17
Abstract
Abstract This invention relates to clay compositions intercalated with inorganic oxide particles and the process from preparing them.
Inventors
- 👤 Robert M. Lewis
- 👤 Rutger A. van Santen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:46
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/049; B01J21/00; B01J21/16; C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2791; Y; Y02; Y02P; Y02P20/00; Y02P20/50
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
30 words
A clay composition comprising colloidal inorganic oxide particles intercalated between the swellable layers of said clay wherein said clay layers are separated by a distance of at least 16 angstrom.
Claim 2
Dependent Claim
30 words
A clay composition comprising colloidal inorganic oxide particles intercalated between the swellable layers of said clay wherein said clay layers are separated by a distance of at least 16 angstrom.
Claim 3
Dependent Claim
57 words
A process for preparing a clay composition having inorganic oxide particles intercalated between the swellable layers of said clay which process comprises: a. contacting a swellable layered clay with a solution of colloidal inorganic oxide particles, said particles having net positive surface charges, b. separating the intercalated clay from the solution and, c. drying said intercalated clay.
Claim 4
Dependent Claim
57 words
A process for preparing a clay composition having inorganic oxide particles intercalated between the swellable layers of said clay which process comprises: a. contacting a swellable layered clay with a solution of colloidal inorganic oxide particles, said particles having net positive surface charges, b. separating the intercalated clay from the solution and, c. drying said intercalated clay.
Claim 5
Dependent Claim
16 words
The process claim 2 wherein the colloidal oxide particles are less than 100 angstroms in diameter.
Claim 6
Dependent Claim
17 words
The process of claim 3 wherein the colloidal oxide particles are less than 50 angstroms in diameter.
Claim 7
Dependent Claim
17 words
The process of claim 4 wherein the colloidal oxide particles are less than 25 angstroms in diameter.
Claim 8
Dependent Claim
25 words
The process of claim 2 wherein the dried intercalated clay is additionally calcined at a temperature ranging from about 100° C. to about 800° C.
Claim 9
Dependent Claim
17 words
The process of claim 6 wherein the temperature ranges from about 200° C. to about 600° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-01-19 | 1990-07-21 | 1991-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-19 | 1994-07-21 | 1995-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-19 | 1998-07-21 | 1999-01-20 | $7700.00 | Window Closed / Lapsed |