US4347395A
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Conversion of paraffinic hydrocarbons to aromatics over zeolite catalysts
Assignee: Mobil Oil AS
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Filing: 1981-04-13
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Granted: 1982-08-31
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Expires: 2001-04-13
Abstract
Abstract Paraffinic hydrocarbons of 2 to 16 carbon atoms are converted to aromatic in the presence of oxygen and a zeolite catalyst incorporating oxidative dehydrogenative metal or metal oxide components
Inventors
- 👤 Yung F. Chu
- 👤 Arthur W. Chester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:51
CPC Classifications
C; C07; C07C; C07C2/00; C07C2523/00; C07C2523/06; C07C2523/16; C07C2523/20; C07C2523/22; C07C2523/24; C07C2523/26; C07C2523/28; C07C2523/70; C07C2523/74; C07C2523/745; C07C2523/76; C07C2523/84; C07C2523/85; C07C2523/86; C07C2523/88; C07C2523/882; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; C07C2529/65; C07C2529/70
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
72 words
A process for producing aromatics from a feedstock containing predominantly paraffinic hydrocarbons of 2 to 16 carbon atoms which comprises contacting said feedstock and air or oxygen with a crystalline zeolite catalyst comprising a zeolite having a constraint index within the approximate range of 1 to 12 and a silica to alumina ratio of at least 12 and having incorporated therein a minor amount of metal or metal oxide oxidative dehydrogenation components.
Claim 2
Dependent Claim
72 words
A process for producing aromatics from a feedstock containing predominantly paraffinic hydrocarbons of 2 to 16 carbon atoms which comprises contacting said feedstock and air or oxygen with a crystalline zeolite catalyst comprising a zeolite having a constraint index within the approximate range of 1 to 12 and a silica to alumina ratio of at least 12 and having incorporated therein a minor amount of metal or metal oxide oxidative dehydrogenation components.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the temperature of said contacting is between about 450° and about 650° C.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein said oxidative dehydrogenation catalyst is iron oxide.
Claim 5
Dependent Claim
19 words
The process of claim 3 wherein said iron oxide oxidative dehydrogenation catalyst is promoted with an alkali metal salt.
Claim 6
Dependent Claim
13 words
The process of claim 4 wherein said alkali metal salt is sodium carbonate.
Claim 7
Dependent Claim
18 words
The process of claim 1 wherein said oxidative dehydrogenation catalyst comprises ferric oxide, potassium oxide, and chromium oxide.
Claim 8
Dependent Claim
32 words
The process of claim 1 wherein said oxidative dehydrogenation catalyst comprises iron ferrite and an oxide of a metal selected from the group consisting of cerium, zinc, manganese, lead, and mixtures thereof.
Claim 9
Dependent Claim
21 words
The process of claim 1 wherein said oxidative dehydrogenation catalyst comprises a mixture of the oxides of cobalt, molybdenum, and chromium.
Claim 10
Dependent Claim
21 words
The process of claim 1 wherein said oxidative dehydrogenation catalyst comprises a mixture of the oxides of zinc, molybdenum and chromium.
Claim 11
Dependent Claim
19 words
The process of claim 1 wherein said oxidative dehydrogenation catalyst is a mixture of oxides of chromium and molybdenum.
Claim 12
Dependent Claim
12 words
The process of claim 10 wherein said oxidative dehydrogenation catalyst contains phosphorous.
Claim 13
Dependent Claim
33 words
The process of claim 10 wherein said oxidative dehydrogenation catalyst contains one or more metals selected from the group consisting of metals from groups IA, IIA, IVB and VIII of the periodic table.
Claim 14
Dependent Claim
21 words
The process of claim 1 wherein said oxidative dehydrogenation catalyst comprises a mixture of the oxides of niobium, vanadium and molybdenum.
Claim 15
Dependent Claim
23 words
The process of claim 1 wherein said zeolite is selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-38 and ZSM-48.
Claim 16
Dependent Claim
24 words
The process of claim 1 wherein said process is carried out at a pressure of between about 1.01×10 5 to about 42.38×10 5 pascal.
Claim 17
Dependent Claim
33 words
The process of claim 2 wherein the molar ratio of oxygen to the total moles of C 2 to C 16 hydrocarbons in the paraffinic feedstock is between about 0.1 and about 1.
Claim 18
Dependent Claim
11 words
The process of claim 1 wherein said feedstock is predominantly ethane.
Claim 19
Dependent Claim
11 words
The process of claim 1 wherein said feedstock is predominantly propane.
Claim 20
Dependent Claim
23 words
The process of claim 1 wherein said process is carried out at a pressure of about 1.01×10 5 to about 21.69×10 5 pascal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |