US3725302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silanized crystalline alumino-silicate
Assignee: Texaco Inc
•
Filing: 1970-08-31
•
Granted: 1973-04-03
•
Expires: 1990-08-31
Abstract
Abstract The external surfaces of crystalline aluminosilicates are treated with hydrocarbyl halosilanes or their condensation products with ammonia, primary amines, secondary amines or alcohols to modify the surface adsorptive properties of the aluminosilicates. In separation processes employing crystalline aluminosilicates wherein the surface adsorbed materials must be removed in a purging operation before the initially adsorbed materials are recovered, silanizing the external surface of the aluminosilicates greatly reduces the time or severity of the purging operation.
Inventors
- 👤 J Shimely
- 👤 E Archer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:39
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; C; C10; C10G; C10G25/00; C10G25/02; C10G25/03
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
37 words
A process according to claim 1 where the molecular sieve has a nominal uniform pore opening of 5 A and the silanizing agent Y is Cl, Z is R3 and R1, R2 and R3 are each methyl.
Claim 2
Dependent Claim
43 words
A process according to claim 1 where the molecular sieve has a nominal uniform pore opening of 5 A and in the silanizing agent Y is Z is R3, R1, R2, R3, R5, R6 and R9 are each methyl and R8 is H.
Claim 3
Dependent Claim
24 words
A process according to claim 1 where in the silanizing agent Z is Y, Y is Cl and R1 and R2 are each methyl.
Claim 4
Dependent Claim
24 words
A process according to claim 1 where in the silanizing agent Z is H, Y is Cl and R1 and R2 are each methyl.
Claim 5
Dependent Claim
29 words
A process according to claim 1 where in the silanizing agent Y is Z, R8 and R9 are each H, and R1, R2, R5 and R6 are each methyl.
Claim 6
Dependent Claim
25 words
A process according to claim 1 where in the silanizing agent Y is Cl, Z is R3 and R1, R2 and R3 are each phenyl.
Claim 7
Dependent Claim
30 words
A process according to claim 1 where in the silanizing agent Y is Z is R3, R8 is H and R1, R2, R3, R5, R6 and R9 are each phenyl.
Claim 8
Dependent Claim
25 words
A process according to claim 1 where in the silanizing agent Z is Y, Y is O-R10 and R1, R2 and R10 are each methyl.
Claim 9
Dependent Claim
26 words
A process according to claim 1 where in the silanizing agent Y is O-R10, Z is R3 and R1, R2, R3 and R10 are each methyl.
Claim 10
Dependent Claim
57 words
A silanized crystalline metal aluminosilicate molecular sieve having nominal uniform pore openings between 3 and 15 A, said silanized sieve being characterized by the presence on its surface of radicals having the formula: where X is R3, H or OR10 and where R1, R2, R3 and R10 are the same or different and are C1-C10 hydrocarbyl radicals.
Claim 11
Dependent Claim
20 words
A silanized molecular sieve according to claim 11 where X is R3 and R1, R2 and R3 are each methyl.
Claim 12
Dependent Claim
19 words
A silanized molecular sieve according to claim 11 where X is H and R1 and R2 are each methyl.
Claim 13
Dependent Claim
20 words
A silanized molecular sieve according to claim 11 where X is R3 and R1, R2 and R3 are each phenyl.
Claim 14
Dependent Claim
20 words
A silanized molecular sieve according to claim 11 where X is OR10 and R1, R2 and R10 are each methyl.
References Cited (Backward Citations)
US3398177A
Cited
US3536521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |