US4333859A
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High silica faujasite polymorph - CSZ-3 and method of synthesizing
Assignee: WR Grace and Co Conn
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Filing: 1980-10-27
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Granted: 1982-06-08
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Expires: 2000-10-27
Abstract
Abstract A high silica faujasite structure, CSZ-3, has a composition 0.02 to 0.20 Cs2O: 0.80 to 0.95 Na2O: Al2O3: 5.0 to 7.0 SiO2: 2-10 H2O The zeolite has utility in sorption, separation and catalytic applications and it has high hydrothermal stability. It is made by reacting sources of silica, alumina, soda, and cesia together with a nucleating agent in the form of seeds or a seed solution, followed by hot aging at a temperature between 50 DEG and 160 DEG C.
Inventors
- 👤 David E. W. Vaughan
- 👤 Michael G. Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:55
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/80; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J29/08; C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2838; C01B33/2853; C01B33/2892; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; Y; Y10; Y10S; Y10S423/00; Y10S423/21
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
25 words
A high silica faujasite aluminosilicate having a silica to alumina ratio of between 5.0 and 7.0 and having cesium ions trapped in the sodalite cages.
Claim 2
Dependent Claim
25 words
A high silica faujasite aluminosilicate having a silica to alumina ratio of between 5.0 and 7.0 and having cesium ions trapped in the sodalite cages.
Claim 3
Dependent Claim
38 words
A high silica faujasite aluminosilicate according to claim 1, having a formula in terms of mole ratios of oxides as follows: 0.80-0.95 Na 2 O:0.02-0.20 Cs 2 O:Al 2 O 3 :5.0-7.0 SiO 2 :2-10 H 2 O.
Claim 4
Dependent Claim
31 words
A hydrogen exchanged high silica faujasite aluminosilicate produced by exchanging the faujasite aluminosilicate of claim 1 with an ammonium solution followed by heating so as to increase the hydrogen ion content.
Claim 5
Dependent Claim
25 words
A composite hydrocarbon conversion catalyst consisting of a mixture of the hydrogen exchanged faujasite aluminosilicate according to claim 3, and an amorphous inorganic oxide matrix.
Claim 6
Dependent Claim
19 words
A catalyst according to claim 4, wherein the amorphous matrix is a semi-synthetic mixture of silica-alumina gel and clay.
Claim 7
Dependent Claim
22 words
A hydrocarbon conversion catalyst made by substantially exchanging the product of claim 4 with elements of Group 2-8 of the Periodic Table.
Claim 8
Dependent Claim
26 words
A composite catalyst comprising the product of claim 6 combined with a Y-faujasite zeolite exchanged with cations of elements of Groups 2-8 of the Periodic Table.
Claim 9
Dependent Claim
34 words
A catalyst comprising about 20-25% of the hydrogen exchanged high silica faujasite aluminosilicate of claim 3, an amorphous inorganic oxide matrix, and a matrix containing about 2-5% by weight of calcined rare-earth exchanged Y-zeolite.
Claim 10
Dependent Claim
41 words
Sorbent compositions comprising an exchanged faujasite aluminosilicate produced by exchanging the high silica faujasite aluminosilicate of claim 2 with cations of elements of Groups 1-8 of the Periodic Table, and with or without a binder comprising clay and/or amorphous inorganic gel.
Claim 11
Dependent Claim
133 words
A method for preparing the high silica faujasite aluminosilicate as defined in claim 1, which comprises (a) preparing a mixture containing sources of cesia, an oxide of sodium, an oxide of silicon, an oxide of aluminum, water and sodium aluminosilicate nucleating seeds, said mixture having a final composition in terms of mole ratios of oxides within the following ranges: 1.8 to 7.0 Na 2 O:0.02 to 0.2 Cs 2 O:Al 2 O 3 :6-20 SiO 2 :90-400 H 2 O said seeds being present in an amount to yield 0.1 to 25 mole percent of the total final alumina content, (b) mixing the composition of step (a) to obtain a homogeneous reaction mixture which forms a gel, and (c) heating the resulting gel at a temperature over 50° C. unitl crystals are formed.
Claim 12
Dependent Claim
22 words
The method according to claim 10, wherein the temperature in the heating step is maintained between over 50° C. and 160° C.
Claim 13
Dependent Claim
39 words
The method according to claim 10, wherein the amount of reactants is controlled to obtain a final composition in the following ranges: 0.80-0.95 Na 2 O:0.02-0.20 Cs 2 O:Al 2 O 3 :5.0-7.0 SiO 2 :2-10 H 2 O.
Claim 14
Dependent Claim
36 words
The method according to claim 10, wherein the seeds have a composition in terms of mole ratios of oxides of about 16 Na 2 O:1-9 Al 2 O 3 :15 SiO 2 :250-2000 H 2 O.
Claim 15
Dependent Claim
20 words
The method according to claim 10, wherein the source of cesia added in step (a) is in the nucleating seeds.
Claim 16
Dependent Claim
22 words
The method according to claim 10, wherein at least some of the cesium is obtained by acid treatment of the mineral pollucite.
Claim 17
Dependent Claim
27 words
The method according to claim 10, wherein the seeds are present in an amount to yield 0.5 to 8 mole percent of the total final alumina content.
Claim 18
Dependent Claim
18 words
The method according to claim 10, further comprising adding alum to neutralize excess caustic provided by the seeds.
Claim 19
Dependent Claim
17 words
The method according to claim 10, further comprising adding metakaolin as a source of silica and alumina.
References Cited (Backward Citations)
US3639099A
Cited
US3904738A
Cited
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| 3.5 Years (Year 4) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
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