US4088706A
Expired / Lapsed
US
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Methanol conversion to para-xylene using a zeolite catalyst containing an oxide of boron, magnesium, phosphorus, or mixtures
Assignee: Mobil Oil AS
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Filing: 1977-05-27
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Granted: 1978-05-09
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Expires: 1997-05-27
Abstract
Abstract A catalytic process is provided for converting lower monohydric alcohols and their ethers, especially methanol and dimethyl ethers, to a hydrocarbon mixture rich in C2-C3 olefins and mononuclear aromatics with high selectivity for para-xylene production by contact, under conversion conditions, with a catalyst comprising a crystalline aluminosilicate zeolite, said zeolite having a silica to alumina ratio of at least about 12 and a constraint index, as hereinafter defined, within the approximate range of 1 to 12, said catalyst having been modified by the addition thereto of a minor proportion of an oxide of boron or magnesium either alone or in combination, or in further combination with an oxide of phosphorus.
Inventors
- 👤 Warren W. Kaeding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:48
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J2229/00; B01J2229/10; B01J2229/18; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
214 words
A process for producing hydrocarbons which compises contacting, under conversion conditions, a charge consisting essentially of 1 or more lower monohydric alcohols having up to 4 carbon atoms, the ethers derived therefrom or mixtures of said alcohols and ethers with a catalyst comprising a crystalline aluminosilicate zeolite, said zeolite having a silica to alumina ratio of at least about 12, a constraint index within the approximate range of 1 to 12, and having combined therewith: (1) between about 0.25 and about 25 percent by weight of boron oxide; or (2) between about 0.25 and about 5 percent by weight of boron oxide in combination with between about 2 and about 15 percent by weight of magnesium oxide; or (3) between about 0.25 and about 10 percent by weight of phosphorus oxide in combination with between about 0.25 and about 25 percent by weight of boron oxide or magnesium oxide; or (4) between about 0.25 and about 10 percent by weight of phosphorus oxide in combination with between about 0.25 and about 5 percent by weight of boron oxide and between about 2 and about 15 percent by weight of magnesium oxide, whereby there is formed a mixture comprising light olefinic hydrocarbons, monocyclic aromatic hydrocarbons, high in paraxylene content, and water and recovering said hydrocarbons.
Claim 2
Dependent Claim
214 words
A process for producing hydrocarbons which compises contacting, under conversion conditions, a charge consisting essentially of 1 or more lower monohydric alcohols having up to 4 carbon atoms, the ethers derived therefrom or mixtures of said alcohols and ethers with a catalyst comprising a crystalline aluminosilicate zeolite, said zeolite having a silica to alumina ratio of at least about 12, a constraint index within the approximate range of 1 to 12, and having combined therewith: (1) between about 0.25 and about 25 percent by weight of boron oxide; or (2) between about 0.25 and about 5 percent by weight of boron oxide in combination with between about 2 and about 15 percent by weight of magnesium oxide; or (3) between about 0.25 and about 10 percent by weight of phosphorus oxide in combination with between about 0.25 and about 25 percent by weight of boron oxide or magnesium oxide; or (4) between about 0.25 and about 10 percent by weight of phosphorus oxide in combination with between about 0.25 and about 5 percent by weight of boron oxide and between about 2 and about 15 percent by weight of magnesium oxide, whereby there is formed a mixture comprising light olefinic hydrocarbons, monocyclic aromatic hydrocarbons, high in paraxylene content, and water and recovering said hydrocarbons.
Claim 3
Dependent Claim
41 words
The process of claim 1 wherein said conversion conditions include a temperature of 250° C. to 700° C., a pressure of from about 0.2 to about 30 atmospheres and a liquid hourly space velocity of between about 0.1 and about 20.
Claim 4
Dependent Claim
15 words
The process of claim 2 wherein said feed is methanol, dimethyl ether or mixtures thereof.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is ZSM-5.
Claim 6
Dependent Claim
11 words
The process of claim 1 wherein said crystalline aluminosilicate is ZSM-11.
Claim 7
Dependent Claim
36 words
The process of claim 1 wherein said zeolite has combined therewith between about 0.25 and about 10 percent by weight of phosphorus oxide and between about 1 and about 15 percent by weight of magnesium oxide.
Claim 8
Dependent Claim
38 words
The process of claim 1 wherein said zeolite has combined therewith between about 1 and about 15 percent by weight of an oxide of boron and between about 0.25 and about 10 percent by weight of phosphorus oxide.
Claim 9
Dependent Claim
23 words
The process of claim 1 wherein said zeolite has combined therewith between about 0.25 and about 15 percent by weight of boron oxide.
Claim 10
Dependent Claim
41 words
The process of claim 1 wherein said zeolite has combined therewith between about 0.5 and about 5 percent by weight of phosphorus oxide in combination with between about 0.25 and about 25 percent by weight of boron oxide or magnesium oxide.
Claim 11
Dependent Claim
55 words
The process of claim 1 wherein said zeolite has combined therewith an oxide of phosphorus in an amount of between about 0.5 and about 5 weight percent in combination with between about 0.25 and about 5 percent by weight of boron oxide and between about 2 and about 15 percent by weight of magnesium oxide.
Claim 12
Dependent Claim
13 words
The process of claim 4 wherein ZSM-5 is predominantly in the hydrogen form.
Claim 13
Dependent Claim
13 words
The process of claim 5 wherein ZSM-11 is predominantly in the hydrogen form.
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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |