US3855147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic smectite compositions, their preparation, and their use as thickeners in aqueous systems
Assignee: Baroid Technology Inc
•
Filing: 1972-05-26
•
Granted: 1974-12-17
•
Expires: 1992-05-26
Abstract
Abstract A process for preparing novel synthetic smectite compositions related to saponite plus accessory hydrous magnesia, and the resulting products. The novel substances have extraordinary swelling and gelling properties in aqueous solutions, including strong electrolyte solutions, and have other specific utilities depending therefrom. The synthetic smectite compositions have the following formula per unit cell: ((Mg6AlxSi8 x O20 (OH4 aFa) x XMZ/z ) +yMg (O,OH) in which the contents of the braces constitutes the unit cell, M is an alkali metal cation, an alkaline earth metal cation, an ammonium ion, or mixtures of such ions, y Mg (O,OH) is the variable amount of accessory phase occluded therewith, and x, y, a, and z have values within the following ranges: 0.1 < OR = X < OR = 1.5 0.1 < OR = Y < OR = 2 0 < OR = A < OR = 2 1 < OR = Z < OR = 2.
Inventors
- 👤 W Granquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:48
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/40; A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/26; A61Q; A61Q19/00; B; B01; B01J; B01J21/00; B01J21/16; B01J29/00; B01J29/04; B01J29/049; C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/36; C01B33/38; C01B33/44; C09; C09D; C09D7/00; C09D7/40; C09D7/43; C12; C12H; C12H1/00; C12H1/02; C12H1/04; C12H1/0408; D21H19/10; A61Q11/00; B01J2229/00; B01J2229/30; B01J2229/42; C08; C08K; C08K3/00; C08K3/34
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
177 words
A SYNTHETIC MINERAL COMPOSITION HAVING THE FFOLLOWING FORMULA PER UNIT CELL: (MG6AIXSI)-X O20 (OH4-AFA))X- (XMZ/Z)+YMG (O,OH) IN WHICH THE CONTENTS OF THE BRACES CONSTITUTES SAID UNIT CELL OF A SEMCTITE AND IN WHICH THE CONTENTS OF THE SQUARE BRACKETS REPRESENTS THE FIXED LATTICE PORTION OF THE UNIT CELL, SAID FIXED LATTICE PORTION HAVING A NEGATIVE CHARGE; AND IN WHICH M REPRESENTS CATIONS BALANCING SAID NEGATIVE CHARGE, AND WHEREIN Z IS THE VALENCE OF SAID M, AND IN WHICH I SAID M IS SELECTED FROM THE GROUP OF CATIONS CONSISTING OF ALKALI METAL CATIONS, ALKALINE EARTH METAL CATIONS AMMONIUM IONS, AND MIXTURES THEREOFF; AND IN WHICH Y MG (O,OH) IS AN ACCESSORY PHASE OCCLUDED WITH SAID SMECTITE AND CONSISTING OF HYDROUS MAGNESIUM OXIDE SELECTED FROM THE CLASS CONSISTING OF MAGNESIUM OXIDE, MAGNESIUM HYDROXIDE. HYDROUS MAGNERSIUM OXIDE SPECIES INTERMEDIATE THEREBETWEEN, AND MIXTURES THREOF; AND IN WHICH SAID X SAID Z AND SAID A HAVE VALUES WITHIN THE FOLLOWING RANGES: 0.1 $ X $ 1.5 0.1 $ Y $ 2 Q $ A $ 2 1 $ Z $ 2.
Claim 2
Dependent Claim
177 words
A SYNTHETIC MINERAL COMPOSITION HAVING THE FFOLLOWING FORMULA PER UNIT CELL: (MG6AIXSI)-X O20 (OH4-AFA))X- (XMZ/Z)+YMG (O,OH) IN WHICH THE CONTENTS OF THE BRACES CONSTITUTES SAID UNIT CELL OF A SEMCTITE AND IN WHICH THE CONTENTS OF THE SQUARE BRACKETS REPRESENTS THE FIXED LATTICE PORTION OF THE UNIT CELL, SAID FIXED LATTICE PORTION HAVING A NEGATIVE CHARGE; AND IN WHICH M REPRESENTS CATIONS BALANCING SAID NEGATIVE CHARGE, AND WHEREIN Z IS THE VALENCE OF SAID M, AND IN WHICH I SAID M IS SELECTED FROM THE GROUP OF CATIONS CONSISTING OF ALKALI METAL CATIONS, ALKALINE EARTH METAL CATIONS AMMONIUM IONS, AND MIXTURES THEREOFF; AND IN WHICH Y MG (O,OH) IS AN ACCESSORY PHASE OCCLUDED WITH SAID SMECTITE AND CONSISTING OF HYDROUS MAGNESIUM OXIDE SELECTED FROM THE CLASS CONSISTING OF MAGNESIUM OXIDE, MAGNESIUM HYDROXIDE. HYDROUS MAGNERSIUM OXIDE SPECIES INTERMEDIATE THEREBETWEEN, AND MIXTURES THREOF; AND IN WHICH SAID X SAID Z AND SAID A HAVE VALUES WITHIN THE FOLLOWING RANGES: 0.1 $ X $ 1.5 0.1 $ Y $ 2 Q $ A $ 2 1 $ Z $ 2.
Claim 3
Dependent Claim
28 words
A mineral composition in accordance with claim 1 wherein said x is approximately equal to 0.5, said y is approximately equal to 1, and said a is 0.
Claim 4
Dependent Claim
16 words
A mineral compositioN in accordance with claim 1 wherein said M is an alkali metal cation.
Claim 5
Dependent Claim
16 words
A mineral composition in accordance with claim 2 wherein said M is an alkali metal cation.
Claim 6
Dependent Claim
16 words
A mineral composition in accordance with claim 3 in which said alkali metal cation is sodium.
Claim 7
Dependent Claim
16 words
A mineral composition in accordance with claim 4 in which said alkali metal cation is sodium.
Claim 8
Dependent Claim
98 words
A process of preparing a synthetic smectite mineral composition which comprises the steps of forming an aqueous slurry containing mixed hydrous oxides of silicon, aluminum, magnesium, and M and fluoride in the proportions defined in accordance with claim 1 and the preselected values of the variables in said claim 1 by adding said components to water; heating said slurry under autoclave conditions under autogenous temperature within the range of approximately 100*C to 325*C. for a sufficient period of time for the mineral composition defined by claim 1 to form; cooling said mixture; and recovering said mineral composition therefrom.
Claim 9
Dependent Claim
29 words
A process in accordance with claim 7 wherein said x is approximately equal to 0.5, said y is approximately equal to 1, and said a is equal to 0.
Claim 10
Dependent Claim
12 words
The process in accordance with claim 7 wherein said M is sodium.
Claim 11
Dependent Claim
23 words
The process in accordance with claim 7 wherein said slurry is maintained at room temperature for at least 8 hours before said heating.
Claim 12
Dependent Claim
23 words
The process in accordance with claim 8 wherein said slurry is maintained at room temperature for at least 8 hours before said heating.
Claim 13
Dependent Claim
23 words
The process in accordance with claim 9 wherein said slurry is maintained at room temperature for at least 8 hours before said heating.
Claim 14
Dependent Claim
34 words
The process of increasing the consistency of an aqueous system which comprises the step of adding to said system a quantity of the mineral composition of claim 1 sufficient to substantially increase said consistency.
Claim 15
Dependent Claim
34 words
The process of increasing the consistency of an aqueous system which comprises the step of adding to said system a quantity of the mineral composition of claim 3 sufficient to substantially increase said consistency.
Claim 16
Dependent Claim
40 words
A composition of matter consisting essentially of an aqueous phase and an amount of the mineral composition of claim 1 sufficient to impart a gel strength to said composition of matter greater than in the absence of said mineral composition.
Claim 17
Dependent Claim
40 words
A composition of matter consisting essentially of an aqueous phase and an amount of the mineral composition of claim 3 sufficient to impart a gel strength to said composition of matter greater than in the absence of said mineral composition.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |