Patent US4350835A successfully refreshed from Google Patents.
US4350835A
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Process for converting ethane to aromatics over gallium-activated zeolite
Assignee: Mobil Oil AS
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Filing: 1981-02-19
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Granted: 1982-09-21
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Expires: 2001-02-19
Abstract
Abstract A catalytic process is provided for converting gaseous feedstocks containing ethane to liquid aromatics by contacting said gaseous feeds in the absence of added air or oxygen, under conversion conditions, with a crystalline zeolite catalyst having incorporated therein a minor amount of gallium, thereby converting the ethane in the feedstock to aromatics and recovering a liquid mixture of benzene, toluene and xylene.
Inventors
- 👤 Arthur W. Chester
- 👤 Yung F. Chu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:46
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C; C07; C07C; C07C2/00; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; B01J29/65; B01J29/70; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; C07C2529/65; C07C2529/70
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
92 words
A process for producing aromatic compounds which comprises contacting under conversion conditions, a gaseous paraffinic hydrocarbon feed containing ethane, with a catalyst comprising gallium and a crystalline zeolite characterized by a constraint index within the approximate range of 1 to 12 and a silica to alumina ratio of at least 12, the weight of gallium in said catalyst being between about 0.05 to about 10 percent based on the total weight of catalyst whereby ethane present in said gaseous feed is converted to aromatic compounds, and recovering said aromatic compounds as liquids.
Claim 2
Dependent Claim
92 words
A process for producing aromatic compounds which comprises contacting under conversion conditions, a gaseous paraffinic hydrocarbon feed containing ethane, with a catalyst comprising gallium and a crystalline zeolite characterized by a constraint index within the approximate range of 1 to 12 and a silica to alumina ratio of at least 12, the weight of gallium in said catalyst being between about 0.05 to about 10 percent based on the total weight of catalyst whereby ethane present in said gaseous feed is converted to aromatic compounds, and recovering said aromatic compounds as liquids.
Claim 3
Dependent Claim
42 words
The process of claim 1 wherein the conversion conditions include a temperature of from about 480° C. to about 760° C., a pressure of from about 1×10 5 to about 30 pascal and a WHSV of from about 0.1 to about 5.
Claim 4
Dependent Claim
22 words
The process of claim 1 wherein said crystalline zeolite is selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-35, and ZSM-38.
Claim 5
Dependent Claim
12 words
The process of claim 3 wherein said zeolite is an acid form.
Claim 6
Dependent Claim
12 words
The process of claim 4 wherein said zeolite is a HZSM-5 zeolite.
Claim 7
Dependent Claim
10 words
The process of claim 1 wherein said zeolite is ZSM-5.
Claim 8
Dependent Claim
10 words
The process of claim 1 wherein said zeolite is ZMS-11.
Claim 9
Dependent Claim
10 words
The process of claim 1 wherein said zeolite is ZSM-12.
Claim 10
Dependent Claim
10 words
The process of claim 1 wherein said zeolite is ZSM-35.
Claim 11
Dependent Claim
10 words
The process of claim 1 wherein said zeolite is ZSM-38.
Claim 12
Dependent Claim
23 words
The process of claim 1 wherein the concentration of gallium in said catalyst is between about 0.5 and about 5 percent by weight.
Claim 13
Dependent Claim
36 words
The process of claim 1 wherein said catalyst composition is composited with a porous matrix material in a proportion of between about 1 to about 99 percent by weight of catalyst composition in the dry composite.
Claim 14
Dependent Claim
36 words
The process of claim 1 wherein said catalyst composition is composited with a porous matrix material in a proportion of between about 5 to about 80 percent by weight of catalyst composition in the dry composite.
Claim 15
Dependent Claim
42 words
The process of claim 1 wherein the conversion conditions include a temperature of from about 590° C. to about 680° C., a pressure from about 1×10 5 to about 8×10 5 pascal and a WHSV of from about 0.2 to about 2.
Claim 16
Dependent Claim
90 words
The process of claim 1 wherein the weight of gallium in said catalyst is between about 0.5 and about 5 percent, said zeolite is ZSM-5, said catalyst is composited with a porous matrix material in a proportion of between about 5 and about 80 percent by weight of catalyst composition in the dry composite, and conversion conditions include a temperature of from about 590° C. to about 680° C., a pressure of from about 1×10 5 to about 8×10 5 pascal and a WHSV of about 0.2 to about 2.
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) | 1985-09-20 | 1986-03-22 | 1986-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-20 | 1990-03-22 | 1990-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-20 | 1994-03-22 | 1994-09-21 | $7700.00 | Window Closed / Lapsed |