Patent US4452907A successfully refreshed from Google Patents.
US4452907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of crystalline aluminosilicates and their use as catalysts and catalyst supports
Assignee: BP PLC
•
Filing: 1982-12-28
•
Granted: 1984-06-05
•
Expires: 2002-12-28
Abstract
Abstract Crystalline aluminosilicates having a silica to alumina molar ratio greater than 12 are produced by mixing a source of silica, a source of alumina, a source of alkali metal, water and a source of ammonium ions, e.g. ammonia or an ammonium salt, in the absence of an alcohol or alkylene oxide, in the molar proportions (expressed in the case of the silica and alumina sources in terms of the equivalent moles of the oxide, in the case of the alkali metal source in terms of the equivalent moles of the hydroxide (MOH) and in the case of the source of ammonium ions in terms of free ammonia): SiO 2 : Al 2 O 3 greater than 12:1 MOH: Al 2 O 3 in the range from 1:1 to 20:1 SiO 2 : NH 3 in the range from 1:1 to 200:1 H 2 O: MOH in the range from 30:1 to 300:1 and maintaining the composition at elevated temperature, such as 120° to 210° C. for a period such that crystallization occurs, typically greater than 4 hours. The crystalline aluminosilicates so-prepared are useful as catalysts and catalyst supports.
Inventors
- 👤 William J. Ball
- 👤 David G. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:06
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/02; C07C4/06; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; C01; C01B; C01B39/00; C01B39/02; C01B39/36; C01B39/38; C07C2/00; B01J2229/00; B01J2229/30; B01J2229/36; C07C2529/00; C07C2529/04; C07C2529/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
207 words
A process for the production of a crystalline aluminosilicate having a silicon to alumina molar ratio greater than 12:1 by mixing a source of silica, a source of alumina, a source of alkali metal, water and an inorganic source of ammonium ions, maintaining the mixture at elevated temperature for a period such that crystallisation occurs characterized in that the source of ammonium ions is employed in the absence of an alcohol or any "seed", i.e., a small portion of the crystalline aluminosilicate desired, or alkylene oxide and the source of silica, the source of alumina, the source of alkali metal, water and the source of ammonium ions are mixed in the molar proportions (expressed in the case of the silica and alumina sources in terms of the equivalent moles of the oxide, in the case of the alkali metal source in terms of the equivalent moles of the hydroxide (MOH) and in the case of the source of ammonium ions in terms of free ammonia): SiO 2 :Al 2 O 3 greater than 12:1 MOH:Al 2 O 3 in the range from 1:1 to 20:1 SiO 2 :NH 3 in the range from 1:1 to 200:1, and H 2 O:MOH in the range from 30:1 to 300:1.
Claim 2
Dependent Claim
207 words
A process for the production of a crystalline aluminosilicate having a silicon to alumina molar ratio greater than 12:1 by mixing a source of silica, a source of alumina, a source of alkali metal, water and an inorganic source of ammonium ions, maintaining the mixture at elevated temperature for a period such that crystallisation occurs characterized in that the source of ammonium ions is employed in the absence of an alcohol or any "seed", i.e., a small portion of the crystalline aluminosilicate desired, or alkylene oxide and the source of silica, the source of alumina, the source of alkali metal, water and the source of ammonium ions are mixed in the molar proportions (expressed in the case of the silica and alumina sources in terms of the equivalent moles of the oxide, in the case of the alkali metal source in terms of the equivalent moles of the hydroxide (MOH) and in the case of the source of ammonium ions in terms of free ammonia): SiO 2 :Al 2 O 3 greater than 12:1 MOH:Al 2 O 3 in the range from 1:1 to 20:1 SiO 2 :NH 3 in the range from 1:1 to 200:1, and H 2 O:MOH in the range from 30:1 to 300:1.
Claim 3
Dependent Claim
15 words
A process according to claim 1 wherein the source of ammonium ions is ammonium hydroxide.
Claim 4
Dependent Claim
16 words
A process according to claim 2 wherein the ammonium hydroxide is added as an aqueous solution.
Claim 5
Dependent Claim
22 words
A process according to claim 2 wherein the ammonium hydroxide is formed `in situ` by passing ammonia gas into the aqueous mixture.
Claim 6
Dependent Claim
16 words
A process according to claim 1 wherein the source of ammonium ions is an ammonium salt.
Claim 7
Dependent Claim
64 words
A process according to any one of the preceding claims wherein the molar composition of the initial mixture is: SiO 2 :Al 2 O 3 in the range from 20:1 to 50:1 MOH:Al 2 O 3 in the range from 2:1 to 10:1 SiO 2 :NH 3 in the range from 20:1 to 100:1 H 2 O:MOH in the range from 30:1 to 100:1.
Claim 8
Dependent Claim
60 words
A process according to claim 7 wherein the molar composition of the initial mixture is: SiO 2 :Al 2 O 3 in the range from 25:1 to 45:1 MOH:Al 2 O 3 in the range from 3:1 to 7:1 SiO 2 :NH 3 in the range from 25:1 to 40:1 H 2 O:MOH in the range from 40:1 to 60:1.
Claim 9
Dependent Claim
18 words
A process according to claim 1 wherein the temperature is in the range from 120° to 210° C.
Claim 10
Dependent Claim
23 words
A process according to claim 1 wherein, the alkali metal content of the crystalline aluminosilicate is reduced to less than 0.2% by weight.
Claim 11
Dependent Claim
32 words
A process according to claim 9 wherein the alkali metal content is reduced by ion-exchange with a solution containing ammonium cations followed by calcination to produce the active hydrogen-form of the aluminosilicate.
Claim 12
Dependent Claim
38 words
A process according to claim 1 wherein, there is incorporated into the crystalline aluminosilicate one or more of the metals copper, silver, zinc, gallium, indium, thallium, lead, antimony, bismuth, iron, cobalt, nickel, ruthenium, rhodium, palladium, iridium and platinum.
Claim 13
Dependent Claim
11 words
A process according to claim 11 wherein the metal is gallium.
Claim 14
Dependent Claim
15 words
A process according to claim 11 wherein the metal or metals is incorporated by impregnation.
Claim 15
Dependent Claim
15 words
A process according to claim 11 wherein the metal or metals is incorporated by ion-exchange.
Claim 16
Dependent Claim
22 words
A process according to claim 1 wherein, prior to the use, there is incorporated into the crystalline aluminosilicate either boron or phosphorus.
References Cited (Backward Citations)
US4151189A
Cited
US4175114A
Cited
US4061724A
Cited
GB1553209A
Cited
US4257885A
Cited
US4242233A
Cited
GB2018232A
Cited
US4285919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |