US4387261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of effluent resulting from conversion of methanol to gasoline in order to decrease durene and produce distillate
Assignee: Mobil Oil AS
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Filing: 1982-04-09
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Granted: 1983-06-07
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Expires: 2002-04-09
Abstract
Abstract A process is disclosed for the dealkylation of durene resulting from a methanol to gasoline conversion by contacting a durene-containing fraction with zeolite ZSM-12 at elevated temperatures and pressures.
Inventors
- 👤 Arthur W. Chester
- 👤 Yung F. Chu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:50
CPC Classifications
C; C10; C10G; C10G3/00; C10G3/42; C10G3/44; C10G3/47; C07; C07C; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/18; C10G3/48; C10G3/49; C10G3/50; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/70; C07C2529/72; C07C2529/74; C10G2300/00; C10G2300/20; C10G2300/30; C10G2300/301; C10G2300/40; C10G2300/4006; C10G2300/4012; C10G2300/4018; C10G2400/00; C10G2400/02; C10G2400/30; Y; Y02; Y02P; Y02P30/00; Y02P30/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
138 words
In the process for the conversion of methanol to gasoline over a ZSM-5 type zeolite wherein methanol is contacted with said zeolite at elevated temperatures and pressures in order to effect conversion to liquid products including gasoline with a concurrent formation of durene and a portion of said liquid is contacted over a solid acidic catalyst, the improvement which comprises carrying out contact of a durene-containing fraction consisting essentially of C 9 + aromatics with zeolite ZSM-12 at a temperature within the range of 800° F. to 1050° F., a pressure within the range of 250 psig to 1000 psig, a hydrogen to hydrocarbon mol ratio greater than 1, and a space velocity of from 0.5 to 10 WHSV in order to dealkylate a substantial portion of the durene and enhance the yield of benzene, toluene and xylenes.
Claim 2
Dependent Claim
138 words
In the process for the conversion of methanol to gasoline over a ZSM-5 type zeolite wherein methanol is contacted with said zeolite at elevated temperatures and pressures in order to effect conversion to liquid products including gasoline with a concurrent formation of durene and a portion of said liquid is contacted over a solid acidic catalyst, the improvement which comprises carrying out contact of a durene-containing fraction consisting essentially of C 9 + aromatics with zeolite ZSM-12 at a temperature within the range of 800° F. to 1050° F., a pressure within the range of 250 psig to 1000 psig, a hydrogen to hydrocarbon mol ratio greater than 1, and a space velocity of from 0.5 to 10 WHSV in order to dealkylate a substantial portion of the durene and enhance the yield of benzene, toluene and xylenes.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein said zeolite ZSM-12 has a hydrogenation/dehydrogenation metal associated therewith.
Claim 4
Dependent Claim
11 words
The process of claim 2 wherein said hydrogenation/dehydrogenation metal is platinum.
Claim 5
Dependent Claim
26 words
The process of claim 3 wherein said liquid fraction has a boiling point greater than about 300°-400° F. and contains at least about 23 wt.% durene.
Claim 6
Dependent Claim
18 words
The process of claim 3 wherein said liquid fraction has a boiling point greater than about 350° F.
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) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |