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US4138363A
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Silane-zeolite compositions
Assignee: PQ Corp
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Filing: 1977-09-14
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Granted: 1979-02-06
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Expires: 1997-09-14
Abstract
Abstract Hydrophilic, silane-zeolite compositions, their preparation, properties and applications are disclosed. These unique composites are formed by condensing a hydrophilic silane onto the surface of a hydrated zeolite. The properties of the silane-zeolite composite are surprisingly similar to those of the zeolite without the surface modification of the silane. These composites are useful in numerous applications of zeolite, particularly in aqueous environments. The composites are particularly suited to be included in detergent compounds as the builder since they do not agglomerate with other detergent ingredients as do zeolites.
Inventors
- 👤 Elliot P. Hertzenberg
- 👤 Howard S. Sherry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:49
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/162; C01; C01B; C01B39/00; C01B39/02; C01B39/026; C11D3/02; C11D3/12; C11D3/124; C11D3/1246; C11D3/128
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
37 words
A composition of matter consisting essentially of: (a) 96.65 to 99.95% by weight of zeolite in the sodium form, containing 15 to 35% water, and (b) 0.05 to 3.35% by weight of silane having a hydrophilic functionality.
Claim 2
Dependent Claim
37 words
A composition of matter consisting essentially of: (a) 96.65 to 99.95% by weight of zeolite in the sodium form, containing 15 to 35% water, and (b) 0.05 to 3.35% by weight of silane having a hydrophilic functionality.
Claim 3
Dependent Claim
58 words
The composition of claim 1 wherein the zeolite has the following formula: Na.sub.x [(AlO.sub.2).sub.x (SiO.sub.2).sub.y ]Z H.sub.2 O wherein x and y are integers of at least 6; the molar ratio of x to y is in the range of 0.1 to 1.1 and Z is an integer such that the water content is between 15 and 35%.
Claim 4
Dependent Claim
11 words
The composition of claim 2 wherein x and y are 12.
Claim 5
Dependent Claim
33 words
The composition of claim 1 wherein x various between 80 and 96, y varies between 112 and 96 and Z is an integer such that the water content is between 15 and 35%.
Claim 6
Dependent Claim
24 words
The composition of claim 1 wherein the hydrophilic functionality of the silane is selected from the group consisting of acrylates, epoxies, amines and carboxylates.
Claim 7
Dependent Claim
133 words
A process for preparing hydrophilic silane-zeolite compositions, comprising the steps of: (a) preparing a solution of an organic solvent and 0.1 to 0.9% by weight of water; (b) adding zeolite to said solution thereby forming a slurry, said zeolite being in the sodium form and containing 15 to 35% by weight of water; (c) maintaining the temperature of said slurry between 22 and 95° C.; (d) agitating said slurry and adding a solution of a silane in an organic solvent, said silane of hydrophilic functionality and present in an amount to provide 0.05 to 3.35% of the final composition by weight; (e) agitating said slurry for a sufficient period of time to assure reaction of the silane with the zeolite surface, and (f) removing said organic solvent and drying to recover the composition.
Claim 8
Dependent Claim
133 words
A process for preparing hydrophilic silane-zeolite compositions, comprising the steps of: (a) preparing a solution of an organic solvent and 0.1 to 0.9% by weight of water; (b) adding zeolite to said solution thereby forming a slurry, said zeolite being in the sodium form and containing 15 to 35% by weight of water; (c) maintaining the temperature of said slurry between 22 and 95° C.; (d) agitating said slurry and adding a solution of a silane in an organic solvent, said silane of hydrophilic functionality and present in an amount to provide 0.05 to 3.35% of the final composition by weight; (e) agitating said slurry for a sufficient period of time to assure reaction of the silane with the zeolite surface, and (f) removing said organic solvent and drying to recover the composition.
Claim 9
Dependent Claim
58 words
The process of claim 6 wherein the zeolite has the composition: Na.sub.x [(AlO.sub.2).sub.x (SiO.sub.2).sub.y ]Z H.sub.2 O wherein x and y are integers of at least 6 and the molar ratio of x to y is 0.1 to 1.1 and Z is an integer such that the water content of said zeolite is 15 to 35% by weight.
Claim 10
Dependent Claim
11 words
The process of claim 7 wherein x and y are 12.
Claim 11
Dependent Claim
31 words
The process of claim 7 wherein x is 80 to 96, y is 112 to 96 and Z is an integer such that the water content is between 15 and 35%.
Claim 12
Dependent Claim
24 words
The process of claim 5 wherein the functional group on the silane is selected from the group consisting of acrylates, epoxies, amines and carboxylates.
Claim 13
Dependent Claim
83 words
A process for preparing a hydrophilic silane-zeolite compositions, comprising the steps of: (a) placing 96.5 to 99.95% by weight of zeolite and 0.05 to 3.5% of a hydrophilic silane in a closed container, said zeolite being in the sodium form and containing 15 to 35% water by weight; (b) agitating said zeolite and silane mixture for a time sufficient to ensure complete mixing; (c) maintaining the temperature of the zeolite-silane mixture at 22 to 95° C. while agitating, and (d) recovering the product.
Claim 14
Dependent Claim
83 words
A process for preparing a hydrophilic silane-zeolite compositions, comprising the steps of: (a) placing 96.5 to 99.95% by weight of zeolite and 0.05 to 3.5% of a hydrophilic silane in a closed container, said zeolite being in the sodium form and containing 15 to 35% water by weight; (b) agitating said zeolite and silane mixture for a time sufficient to ensure complete mixing; (c) maintaining the temperature of the zeolite-silane mixture at 22 to 95° C. while agitating, and (d) recovering the product.
Claim 15
Dependent Claim
53 words
The process of claim 11 wherein the zeolite has the formula: Na.sub.x [(AlO.sub.2).sub.x (SiO.sub.2).sub.y ]Z H.sub.2 O wherein x and y are integers of at least 6 and the molar ratio of x to y is 0.1 to 1.1 and Z is an integer such that the water content is 15 to 35%.
Claim 16
Dependent Claim
11 words
The process of claim 12 wherein x and y are 12.
Claim 17
Dependent Claim
24 words
The process of claim 11 wherein the functional groups on the silane is selected from the group consisting of acrylates, epoxies, amines and carboxylates.
Claim 18
Dependent Claim
31 words
The process of claim 12 wherein x is 80 to 90, y is 112 to 96 and Z is an integer such that the water content is between 15 and 35%.
References Cited (Backward Citations)
US3725302A
Cited
US4066394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |