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US4497970A Expired / Lapsed US ⏱️ 0.0 years remaining

Aromatics production

Assignee: BP PLC
•
Filing: 1983-04-08
•
Granted: 1985-02-05
•
Expires: 2003-04-08
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Abstract

Abstract This invention relates to a process for converting a feedstock comprising aliphatic or alicyclic hydrocarbons into aromatic hydrocarbons by bringing into contact in a fluid phase a mixture of the feedstock and an oxidizing agent other than molecular oxygen or a gas containing molecular oxygen into contact with a solid acidic catalyst having Bronsted acid sites. The process is particularly suitable for converting methane, ethane and/or ethylene into aromatics. The solid acidic catalyst with Bronsted acid sites may be an aluminosilicate zeolite with a silica to alumina ratio greater than 12:1. The oxidizing agents other than molecular oxygen or a gas containing molecular oxygen may be selected from nitrous oxide, sulphur trioxide, hydrogen peroxide, ozone, nitric oxide, carbon dioxide and nitrogen oxyfluoride. The process yields high octane value aromatics even from methane at relatively low conversion temperatures.

Inventors

  • 👤 Dennis Young

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 20:37
CPC Classifications
C; C07; C07C; C07C2/00; C07C2523/00; C07C2523/08; C07C2523/38; C07C2523/40; C07C2523/70; C07C2523/74; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/064

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 69 words
A process for converting a feedstock consisting essentially of methane or ethane into aromatic hydrocarbons by bringing at a temperature of from about 350° to 500° C. a mixture in a fluid phase of said feedstock and an oxidizing agent selected from the group consisting of nitrous oxide, sulfur trioxide, hydrogen peroxide, ozone, nitric oxide, and nitrogen oxyfluoride into contact with a solid acidic catalyst having Bronsted acid sites.
Claim 2
Dependent Claim 69 words
A process for converting a feedstock consisting essentially of methane or ethane into aromatic hydrocarbons by bringing at a temperature of from about 350° to 500° C. a mixture in a fluid phase of said feedstock and an oxidizing agent selected from the group consisting of nitrous oxide, sulfur trioxide, hydrogen peroxide, ozone, nitric oxide, and nitrogen oxyfluoride into contact with a solid acidic catalyst having Bronsted acid sites.
Claim 3
Dependent Claim 28 words
A process according to claim 1 wherein the solid acidic catalyst with Bronsted acid sites is an aluminosilicate zeolite with a silica to alumina ratio greater than 12:1.
Claim 4
Dependent Claim 36 words
A process according to claim 2 wherein the zeolite contains a further component or components selected from a gallium compound and a compound of a Group VIII metal according to the Periodic Table due to Mendeleef.
Claim 5
Dependent Claim 15 words
A process according to claim 3 wherein the compounds are the oxides of the metals.
Claim 6
Dependent Claim 21 words
A process according to claim 1 wherein the reaction is carried out at a pressure of between 1 and 50 bar.
Claim 7
Dependent Claim 25 words
A process according to claim 1, wherein the relative proportions of the hydrocarbon feedstock to the oxidising agent by volume is between 1:1 and 10:1.
Claim 8
Dependent Claim 13 words
A process according to claim 1 wherein the feedstock consists essentially of methane.
Claim 9
Dependent Claim 13 words
A process according to claim 1 wherein the feedstock consists essentially of ethane.
Claim 10
Dependent Claim 24 words
A process according to claim 7 or 8 wherein the oxidizing agent is selected from the group consisting of nitrous oxide and sulfur trioxide.

References Cited (Backward Citations)

US2255421A Cited
US3760024A Cited
US3775501A Cited
US3894104A Cited
US3899544A Cited
US4304657A Cited
US4350835A Cited
US4347395A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-02-05 1988-08-06 1989-02-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-02-05 1992-08-06 1993-02-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-02-05 1996-08-06 1997-02-05 $7700.00 Window Closed / Lapsed

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