US4407728A
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Method for producing crystalline aluminosilicates and their use as catalysts and catalyst supports
Assignee: BP PLC
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Filing: 1981-02-02
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Granted: 1983-10-04
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Expires: 2001-02-02
Abstract
Abstract The invention relates to a method for preparing a crystalline aluminosilicate having a high silica to alumina molar ratio and an X-ray diffraction pattern substantially the same as that of ZSM-5 zeolite which method comprises mixing a source of silica, a source of alumina, a source of alkali metal, water and at least one alkanolamine according to Formula (I): <IMAGE> (I) wherein any two of R1, R2 and R3 are independently alkylol groups and the remaining one of R1, R2 and R3 is a hydrogen atom or all of R1, R2 and R3 are independently alkylol group, the alkylol groups being -CH2-R-OH, wherein R is -CH2-, -CH2CH2-, or -CH(CH3)-, the ratio of said source of silica to said source of alumina being at least 20:1 based on the equivalent moles of silica and alumina in said respective sources, maintaining said mixture at a temperature above about 120 DEG C. and recovering the crystalline aluminosilicate formed.
Inventors
- 👤 William J. Ball
- 👤 Keith W. Palmer
- 👤 David G. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:45
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2876; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/061; B01J29/40; B01J35/00; B01J35/70; B01J2229/00; B01J2229/30; B01J2229/42; B01J2235/00; B01J2235/15; Y; Y02; Y02P; Y02P30/00; Y02P30/20; Y02P30/40; Y10; Y10S; Y10S423/00; Y10S423/22
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
172 words
A method for preparing a crystalline aluminosilicate having a high silica to alumina molar ratio and an X-ray diffraction pattern substantially the same as that of ZSM- 5 zeolite which method comprises mixing a source of silica, a source of alumina, a source of alkali metal, water and at least one alkanolamine according to Formula (I): ##STR4## wherein any two of R 1 , R 2 and R 3 are independently alkylol groups and the remaining one of R 1 , R 2 and R 3 is a hydrogen atom or all of R 1 , R 2 and R 3 are independently alkylol groups, the alkylol groups being --CH 2 --R--OH, wherein R is --CH 2 --, --CH 2 CH 2 --, or --CH(CH 3 )--, the ratio of said source of silica to said source of alumina being at least 20:1 based on the equivalent moles of silica and alumina in said respective sources, maintaining said mixture at a temperature above about 120° C. and recovering the crystalline aluminosilicate formed.
Claim 2
Independent Claim
172 words
A method for preparing a crystalline aluminosilicate having a high silica to alumina molar ratio and an X-ray diffraction pattern substantially the same as that of ZSM- 5 zeolite which method comprises mixing a source of silica, a source of alumina, a source of alkali metal, water and at least one alkanolamine according to Formula (I): ##STR4## wherein any two of R 1 , R 2 and R 3 are independently alkylol groups and the remaining one of R 1 , R 2 and R 3 is a hydrogen atom or all of R 1 , R 2 and R 3 are independently alkylol groups, the alkylol groups being --CH 2 --R--OH, wherein R is --CH 2 --, --CH 2 CH 2 --, or --CH(CH 3 )--, the ratio of said source of silica to said source of alumina being at least 20:1 based on the equivalent moles of silica and alumina in said respective sources, maintaining said mixture at a temperature above about 120° C. and recovering the crystalline aluminosilicate formed.
Claim 3
Dependent Claim
14 words
A method according to claim 1 wherein said alkanolamine of formula (I) is diethanolamine.
Claim 4
Dependent Claim
14 words
A method according to claim 1 wherein said alkanolamine of formula (I) is triethanolamine.
Claim 5
Dependent Claim
14 words
A method according to claim 1 wherein said alkanolamine of formula (I) is dipropanolamine.
Claim 6
Dependent Claim
14 words
A method according to claim 1 wherein said alkanolamine of formula (I) is tripropanolamine.
Claim 7
Dependent Claim
144 words
A method for preparing a crystalline aluminosilicate having a high silica to alumina molar ratio and an X-ray diffraction pattern substantially the same as that of ZSM-5 zeolite which method comprises mixing a source of silica, a source of alumina, a source of alkali metal, water and the precursors of at least one alkanolamine according to formula (I) as defined in claim 1, said precursors consisting of ethylene oxide or propylene oxide and a nitrogen-containing compound having one or more hydrogen atoms attached to a nitrogen atom selected from the group consisting of ammonia, monoethanolamine, monopropanolamine, diethanolamine and dipropanolamine, the ratio of said source of silica to said source of alumina being at least 20:1 based on the equivalent moles of silica and alumina in said respective sources, maintaining said mixture at a temperature above about 120° C. and recovering the crystalline aluminosilicate formed.
Claim 8
Dependent Claim
15 words
A method according to claim 6 wherein said precursors consist of ethylene oxide and ammonia.
Claim 9
Dependent Claim
15 words
A method according to claim 6 wherein said precursors consist of propylene oxide and ammonia.
Claim 10
Dependent Claim
15 words
A method according to claim 6 wherein said precursors consist of ethylene oxide and monoethanolamine.
Claim 11
Dependent Claim
29 words
A method according to claim 6 wherein the molar ratio of said ethylene oxide or propylene oxide to said nitrogen-containing compound is in the range from 10:1 to 2:1.
Claim 12
Dependent Claim
22 words
A method according to either claim 1 or claim 6 wherein said temperature is in the range from 135° to 210° C.
Claim 13
Dependent Claim
22 words
A method according to either claim 1 or claim 6 wherein said temperature is in the range from 135° to 190° C.
Claim 14
Dependent Claim
25 words
A method according to either claim 1 or claim 6 wherein said crystalline aluminosilicate product is recovered after a time not less than 4 hours.
Claim 15
Dependent Claim
31 words
A method according to either claim 1 or claim 6 wherein said ratio of said sources of silica to said source of alumina is in the range from 20:1 to 150:1.
Claim 16
Dependent Claim
28 words
A method according to either claim 1 or claim 6 wherein said ratio of said source of silica to said source of alumina is from 20:1 to 100:1.
Claim 17
Dependent Claim
39 words
A method according to either claim 1 or claim 6 wherein the ratio of the number of mole equivalents of total silica and alumina in said sources of silica and alumina is in the range from 2:1 to 0.02:1.
Claim 18
Dependent Claim
50 words
A method according to either claim 1 or claim 6 wherein the ratio of the number of moles of said alkanolamine of formula (I) to the number of mole equivalents of total silica and alumina in said sources of silica and alumina is in the range from 10:1 to 0.02:1.
Claim 19
Dependent Claim
45 words
A method for preparing a crystalline aluminosilicate as defined in either claim 1 or claim 6 wherein the alkali metal content of said recovered crystalline aluminosilicate is reduced to a level of 0.2% by weight or less by subjecting it to one or more ion-exchanges.
Claim 20
Dependent Claim
53 words
A method for preparing a crystalline aluminosilicate as defined in either claim 1 or claim 6 wherein the active hydrogen-form of said recovered crystalline aluminosilicate is produced by ion-exchanging said crystalline aluminosilicate with a solution containing ammonium ions to form an ammonium ion-exchanged crystalline aluminosilicate and thereafter calcining said ammonium ion-exchanged crystalline aluminosilicate.
Claim 21
Dependent Claim
46 words
A method for preparing a crystalline aluminosilicate as defined in either claim 1 or claim 6 wherein said recovered crystalline aluminosilicate is activated by heating in air at a temperature in the range 400° to 700° C. for a period of from 2 to 48 hours.
Claim 22
Dependent Claim
56 words
A method for preparing a crystalline aluminosilicate as defined in either claim 1 or claim 6 wherein the crystalline aluminosilicate reaction product is impregnated with a compound of at least one metal selected from the group consisting of copper, silver, zinc, gallium, indium, thallium, lead, antimony, bismuth, iron, cobalt, nickel, ruthenium, rhodium, palladium, iridium and platinum.
Claim 23
Dependent Claim
28 words
A method for preparing a crystalline aluminosilicate as defined in either claim 1 or claim 6 wherein said recovered crystalline aluminosilicate is impregnated with a compound of gallium.
Claim 24
Dependent Claim
48 words
A method for preparing a crystalline aluminosilicate as defined in either claim 1 or claim 6 wherein said recovered crystalline aluminosilicate is treated with a suitable compound containing a non-metallic element selected from the group consisting of boron and phosphorus to incorporate said non-metallic element into the aluminosilicate.
References Cited (Backward Citations)
US3130007A
Cited
DE1955095A1
Cited
US3702886A
Cited
GB1365318A
Cited
US4151189A
Cited
US4175114A
Cited
US4275047A
Cited
US4089929A
Cited
DE2746844A1
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |