US4354049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of aromatic hydrocarbons
Assignee: BP PLC
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Filing: 1981-03-11
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Granted: 1982-10-12
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Expires: 2001-03-11
Abstract
Abstract A process for the production of aromatic hydrocarbons which process comprises contacting at elevated temperature and in the vapor phase a C 2 to C 12 aliphatic hydrocarbon feedstock with a catalyst comprising a crystalline aluminosilicate having a silica to alumina molar ratio greater than 12:1 which has been modified by incorporation therein of aluminium either by exchange or impregnation.
Inventors
- 👤 William J. Ball
- 👤 David G. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:27
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; C; C07; C07C; C07C2/00; B01J2229/00; B01J2229/10; B01J2229/18; B01J2229/186; B01J2229/26; B01J2229/30; B01J2229/42; C07C2529/00; C07C2529/04; C07C2529/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
60 words
A process for the production of aromatic hydrocarbons which process comprises contacting at elevated temperature and in the vapour phase a C 2 to C 12 aliphatic hydrocarbon feedstock with a catalyst comprising a crystalline aluminosilicate having a silica to alumina molar ratio greater than 12:1 which has been modified by incorporation therein of aluminium either by exchange or impregnation.
Claim 2
Dependent Claim
60 words
A process for the production of aromatic hydrocarbons which process comprises contacting at elevated temperature and in the vapour phase a C 2 to C 12 aliphatic hydrocarbon feedstock with a catalyst comprising a crystalline aluminosilicate having a silica to alumina molar ratio greater than 12:1 which has been modified by incorporation therein of aluminium either by exchange or impregnation.
Claim 3
Dependent Claim
17 words
A process according to claim 1 wherein the feedstock is a C 3 to C 6 hydrocarbon.
Claim 4
Dependent Claim
23 words
A process according to either claim 1 or claim 2 wherein the feedstock is a C 4 hydrocarbon fraction containing isobutane and/or isobutene.
Claim 5
Dependent Claim
23 words
A process according to either claim 1 or claim 2 wherein the feedstock is a C 3 hydrocarbon fraction containing propane and/or propylene.
Claim 6
Dependent Claim
54 words
A process according to claim 1 or claim 2 wherein the crystalline aluminosilicate having a silica to alumina molar ratio greater than 12:1 is the crystalline aluminosilicate produced by crystallising a mixture containing a source of alumina, a source of silica, a source of alkali metal, water and a tetraalkylammonium compound or its precursors.
Claim 7
Dependent Claim
58 words
A process according to claim 1 or claim 2 wherein the crystalline aluminosilicate having a silica to alumina molar ratio greater than 12:1 is the crystalline aluminosilicate produced by crystallising a mixture containing a source of alumina, a source of silica, a source of alkali metal, water and a mono-, di- or tri-ethanolamine or propanolamine or their precursors.
Claim 8
Dependent Claim
170 words
A process according to claim 1 or claim 2 wherein the crystalline aluminosilicate having a silica to alumina molar ratio greater than 12:1 is the crystalline aluminosilicate produced by mixing a source of silica, a source of alumina, a source of alkali metal, water and a source of ammonium ions in the absence of an alcohol or alkylene oxide in the molar proportions (expressed in the case of 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 and maintaining the mixture at elevated temperature for a period such that crystallisation occurs.
Claim 9
Dependent Claim
29 words
A process according to claim 1 or claim 2 wherein the amount of aluminium incorporated is in the range from 0.1 to 10% by weight of the crystalline aluminosilicate.
Claim 10
Dependent Claim
28 words
A process according to claim 1 or claim 2 wherein the aliphatic hydrocarbon is contacted with the catalyst at a temperature in the range 450° to 700° C.
Claim 11
Dependent Claim
12 words
A process according to claim 1 or claim 2 when operated continuously.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |