Patent US4837119A successfully refreshed from Google Patents.
US4347397A
Expired / Lapsed
US
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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: 1981-04-27
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Granted: 1982-08-31
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Expires: 2001-04-27
Abstract
Abstract A novel process for the reduction of durene produced in a methanol to gasoline conversion process is disclosed wherein either the total effluent from said process or a bottoms fraction containing durene is contacted with an isomerization catalyst at elevated temperatures in order to convert said durene.
Inventors
- 👤 Francis G. Dwyer
- 👤 Albin Huss, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:10
CPC Classifications
C; C10; C10G; C10G3/00; C10G3/42; C10G3/44; C10G3/48; C10G3/49; C10G2300/00; C10G2300/10; C10G2300/1096; C10G2300/20; C10G2300/30; C10G2300/301; C10G2400/00; C10G2400/02; Y; Y02; Y02P; Y02P30/00; Y02P30/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
113 words
In the process for the conversion a methanol to gasoline over a ZSM-5 type zeolite wherein methanol is contacted with said zeolite at elevated temperature in order to effect conversion to gasoline with a concurrent formation of durene, the improvement which comprises: contacting a liquid fraction comprising a durene containing fraction of the effluent from said methanol-to-gasoline conversion process and further comprising less than about five percent by weight benzene with a solid acidic isomerization catalyst having a pore size sufficiently large to admit tetramethylbenzenes at elevated temperatures ranging from about 500° to 1000° F. so as to effect isomerization of said durene to produce 1,2,3,4- and 1,2,3,5-tetramethylbenzenes and thereby diminish the same.
Claim 2
Dependent Claim
113 words
In the process for the conversion a methanol to gasoline over a ZSM-5 type zeolite wherein methanol is contacted with said zeolite at elevated temperature in order to effect conversion to gasoline with a concurrent formation of durene, the improvement which comprises: contacting a liquid fraction comprising a durene containing fraction of the effluent from said methanol-to-gasoline conversion process and further comprising less than about five percent by weight benzene with a solid acidic isomerization catalyst having a pore size sufficiently large to admit tetramethylbenzenes at elevated temperatures ranging from about 500° to 1000° F. so as to effect isomerization of said durene to produce 1,2,3,4- and 1,2,3,5-tetramethylbenzenes and thereby diminish the same.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein the total effluent from said methanol to gasoline conversion process is contacted with said conversion catalyst.
Claim 4
Dependent Claim
25 words
The process of claim 1 wherein only a portion of the liquid product from said methanol to gasoline conversion is contacted with said conversion catalyst.
Claim 5
Dependent Claim
18 words
The process of claim 3 wherein said liquid fraction has a boiling point greater than about 200°-400° F.
Claim 6
Dependent Claim
18 words
The process of claim 3 wherein said liquid fraction has a boiling point greater than about 300°-400° F.
Claim 7
Dependent Claim
18 words
The process of claim 3 wherein said liquid fraction has a boiling point greater than about 350° F.
Claim 8
Dependent Claim
15 words
The process of claim 1 wherein said conversion catalyst is a solid acidic amorphous material.
Claim 9
Dependent Claim
15 words
The process of claim 1 wherein said conversion catalyst is a solid acidic crystalline material.
Claim 10
Dependent Claim
21 words
The process of claim 7 wherein said solid is selected from the Group consisting of silica-alumina, silica-magnesia, silica-zirconia, and mixtures thereof.
Claim 11
Dependent Claim
12 words
The process of claim 9 wherein said amorphous solid is silica alumina.
Claim 12
Dependent Claim
32 words
The process of claim 8 wherein said solid acidic crystalline material is a crystalline aluminosilicate zeolite selected from the group consisting of zeolite X, zeolite Y, ZSM-4, zeolite Beta, ZSM-11, and ZSM-12.
Claim 13
Dependent Claim
16 words
The process of claim 11 wherein said crystalline material is a rare earth exchanged zeolite Y.
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) | 1985-08-30 | 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 |