US4454056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of zeolites modified on the surface with organosilanes
Assignee: Evonik Operations GmbH
•
Filing: 1983-03-09
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Granted: 1984-06-12
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Expires: 2003-03-09
Abstract
Abstract The invention is directed to a process for the production of zeolites of the type Na A4 having the surface modified with organosilanes. The organosilane must have at least one alkoxy group bonded to the silicon atom. The modified zeolites of the invention are used in washing and cleansing agents.
Inventors
- 👤 Udo Kittelmann
- 👤 Manfred Diehl
- 👤 Roland Bergmann
- 👤 Gunter Stadtmuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:06
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/12; C11D3/124; C11D3/1246; C11D3/128; C01; C01B; C01B39/00; C01B39/02; C01B39/026; C11D3/16; C11D3/162; B; B01; B01J; B01J2229/00; B01J2229/10; B01J2229/12; B01J2229/30; B01J2229/32; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
92 words
A process for the production of a crystalline zeolite in the sodium form having the surface modified with an organosilane comprising reacting the zeolite with 0.02 to 5 weight % based on the amount of zeolite employed of an organosilane of the formula R.sub.n.sup.1 SiR.sup.2 (OR).sub.3-n where R and R 1 are C 1 -C 5 alkyl, methoxy, ethoxy, phenyl, or C 5 to C 8 cycloalkyl and R 2 is a hydrocarbon group having 1 to 8 carbon atoms and free from ethylenic unsaturation and n is 0, 1, or 2.
Claim 2
Dependent Claim
92 words
A process for the production of a crystalline zeolite in the sodium form having the surface modified with an organosilane comprising reacting the zeolite with 0.02 to 5 weight % based on the amount of zeolite employed of an organosilane of the formula R.sub.n.sup.1 SiR.sup.2 (OR).sub.3-n where R and R 1 are C 1 -C 5 alkyl, methoxy, ethoxy, phenyl, or C 5 to C 8 cycloalkyl and R 2 is a hydrocarbon group having 1 to 8 carbon atoms and free from ethylenic unsaturation and n is 0, 1, or 2.
Claim 3
Dependent Claim
14 words
A process according to claim 1 carried out in the absence of a solvent.
Claim 4
Dependent Claim
18 words
A process according to claim 1 carried out in the presence of an organic solvent for the organosilane.
Claim 5
Dependent Claim
15 words
A process according to claim 3 wherein the solvent is an inert apolar hydrocarbon solvent.
Claim 6
Dependent Claim
18 words
A process according to claim 1 comprising adding the organosilane to a suspension of the zeolite in water.
Claim 7
Dependent Claim
26 words
A process according to claim 1 wherein R 2 is alkyl of 3 to 8 carbon atoms, phenyl, or cycloalkyl of 5 to 8 carbon atoms.
Claim 8
Dependent Claim
42 words
A process according to claim 1 wherein R 1 is alkyl of 1 to 3 carbon atoms, methoxy or ethoxy, R 2 is alkyl of 1 to 3 carbon atoms, and R is methoxy, or ethoxy and n is 0 or 1.
Claim 9
Dependent Claim
13 words
A process according to claim 7 wherein the organosilane is n-propyltriethoxysilane or dimethyldiethoxysilane.
Claim 10
Dependent Claim
15 words
A process according to claim 1 wherein the zeolite is a zeolite of Type A.
Claim 11
Dependent Claim
41 words
A process according to claim 9 wherein R 1 is alkyl of 1 to 3 carbon atoms, methoxy or ethoxy, R 2 is alkyl of 1 to 3 carbon atoms, R is methoxy or ethoxy and n is 0 or 1.
Claim 12
Dependent Claim
13 words
A process according to claim 9 wherein the organosilane is n-propyltriethoxysilane or dimethyldiethoxysilane.
Claim 13
Dependent Claim
31 words
A process according to claim 5 wherein the solids content of the aqueous suspension is 20 to 60 weight % and the process includes the step of spray drying the suspension.
Claim 14
Dependent Claim
13 words
A process according to claim 11 wherein the organosilane is n-propyltriethoxysilane or dimethyldiethoxysilane.
Claim 15
Dependent Claim
12 words
The organosilane surface modified zeolite prepared by the process of claim 1.
Claim 16
Dependent Claim
12 words
The organosilane surface modified zeolite prepared by the process of claim 6.
Claim 17
Dependent Claim
12 words
The organosilane surface modified zeolite prepared by the process of claim 7.
Claim 18
Dependent Claim
12 words
The organosilane surface modified zeolite prepared by the process of claim 8.
Claim 19
Dependent Claim
12 words
The organosilane surface modified zeolite prepared by the process of claim 9.
Claim 20
Dependent Claim
12 words
The organosilane surface modified zeolite prepared by the process of claim 10.
Claim 21
Dependent Claim
12 words
The organosilane surface modified zeolite prepared by the process of claim 11.
Claim 22
Dependent Claim
14 words
A detergent or cleansing composition containing the organosilane surface modified zeolite of claim 13.
Claim 23
Dependent Claim
16 words
A surface modified zeolite according to claim 13 containing 0.02 to 2 weight % of organosilane.
References Cited (Backward Citations)
US3846463A
Cited
US4034139A
Cited
DE2447021A1
Cited
DE2517218A1
Cited
US4073867A
Cited
US4303629A
Cited
DE2651420A1
Cited
DE2651419A1
Cited
DE2651436A1
Cited
US4303626A
Cited
US4303627A
Cited
US4303628A
Cited
US4305916A
Cited
US4138363A
Cited
US4183814A
Cited
US4216125A
Cited
US4243545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |