US4273753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
De-aluminization of aluminosilicates
Assignee: Mobil Oil AS
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Filing: 1979-09-10
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Granted: 1981-06-16
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Expires: 1999-09-10
Abstract
Abstract A process for the de-aluminization of aluminosilicates such as zeolites, clays, gels, amorphous silica-aluminas and crystalline silica-aluminas. The process comprises contacting an aluminosilicate with an inorganic halide or oxyhalide at a temperature sufficiently high enough to volatilize the aluminum halide or oxyhalide which is formed.
Inventors
- 👤 Clarence D. Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:43
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; B01J29/18; B01J37/00; B01J37/08; B01J2229/00; B01J2229/10; B01J2229/16; Y; Y10; Y10S; Y10S423/00; Y10S423/22
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
84 words
A process for removing aluminum from crystalline aluminosilicate zeolites which comprises contacting a crystalline aluminosilicate zeolite with an inorganic halide or inorganic oxyhalide comprising a halogen and a non-halogen component to form an aluminum halide or aluminum oxyhalide and to deposit said non-halogen component in the crystalline aluminosilicate zeolite structure, at temperatures sufficiently high enough to volatilize the formed aluminum halide or aluminum oxyhalide and under conditions sufficient to remove the aluminum halide or aluminum oxyhalide from the crystalline aluminosilicate zeolite as a vapor.
Claim 2
Dependent Claim
84 words
A process for removing aluminum from crystalline aluminosilicate zeolites which comprises contacting a crystalline aluminosilicate zeolite with an inorganic halide or inorganic oxyhalide comprising a halogen and a non-halogen component to form an aluminum halide or aluminum oxyhalide and to deposit said non-halogen component in the crystalline aluminosilicate zeolite structure, at temperatures sufficiently high enough to volatilize the formed aluminum halide or aluminum oxyhalide and under conditions sufficient to remove the aluminum halide or aluminum oxyhalide from the crystalline aluminosilicate zeolite as a vapor.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein said halogen is selected from the group consisting of chlorine, bromine and iodine.
Claim 4
Dependent Claim
10 words
The process of claim 2 wherein said halogen is chlorine.
Claim 5
Dependent Claim
17 words
The process of claim 3 wherein said temperature is between about 140° C. and about 760° C.
Claim 6
Dependent Claim
17 words
The process of claim 4 wherein said temperature is between about 180° C. and about 600° C.
Claim 7
Dependent Claim
10 words
The process of claim 2 wherein said halogen is bromine.
Claim 8
Dependent Claim
17 words
The process of claim 6 wherein said temperature is between about 150° C. and about 800° C.
Claim 9
Dependent Claim
16 words
The process of claim 7 wherein said temperature is about 260° C. and about 700° C.
Claim 10
Dependent Claim
10 words
The process of claim 2 wherein said halogen is iodine.
Claim 11
Dependent Claim
17 words
The process of claim 9 wherein said temperature is between about 250° C. and about 800° C.
Claim 12
Dependent Claim
17 words
The process of claim 10 wherein said temperature is between about 380° C. and about 700° C.
Claim 13
Dependent Claim
13 words
The process of claim 1 wherein said inorganic halide is SiCl 4 .
Claim 14
Dependent Claim
12 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is HZSM-5.
Claim 15
Dependent Claim
12 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is mordenite.
Claim 16
Dependent Claim
66 words
A process for increasing the silica to alumina mole ratio of crystalline aluminosilicate zeolites which comprises contacting a crystalline aluminosilicate zeolite with a silicon containing inorganic halide to form an aluminum halide and to deposit said silicon in said zeolite structure, at temperatures sufficiently high enough to volatilize the formed aluminum halide and under conditions sufficient to remove aluminum halide from the zeolite as a vapor.
Claim 17
Dependent Claim
66 words
A process for increasing the silica to alumina mole ratio of crystalline aluminosilicate zeolites which comprises contacting a crystalline aluminosilicate zeolite with a silicon containing inorganic halide to form an aluminum halide and to deposit said silicon in said zeolite structure, at temperatures sufficiently high enough to volatilize the formed aluminum halide and under conditions sufficient to remove aluminum halide from the zeolite as a vapor.
Claim 18
Dependent Claim
26 words
The process of claim 15 wherein said halide is SiCl 4 and said temperature is in the range of between about 140° C. and 760° C.
Claim 19
Dependent Claim
16 words
The process of claim 16 wherein said temperature is between about 180° C. and 600° C.
Claim 20
Dependent Claim
11 words
The process of claim 15 wherein said crystalline aluminosilicate is HZSM-5.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |