Patent US3931349A successfully refreshed from Google Patents.
US3931349A
Expired / Lapsed
US
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Conversion of methanol to gasoline components
Assignee: Mobil Oil AS
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Filing: 1974-09-23
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Granted: 1976-01-06
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Expires: 1994-09-23
Abstract
Abstract A process is described for the production of aromatics boiling in the gasoline boiling range from methanol carried out in two stages wherein a heat dissipating diluent is employed in the second stage during contact with a crystalline zeolite catalyst selective for the purpose and the first stage exothermic temperature rise is catalytically restricted.
Inventors
- 👤 James C. W. Kuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:59
CPC Classifications
C; C10; C10G; C10G3/00; C10G3/54; C10G3/42; C10G3/44; C10G3/48; C10G3/49; C10L; C10L1/00; C10L1/04; C10L1/06; C10G2300/00; C10G2300/40; C10G2300/4006; C10G2300/80; C10G2300/802; C10G2400/00; C10G2400/02; Y; Y02; Y02P; Y02P30/00; Y02P30/20; Y10; Y10S; Y10S208/00; Y10S208/95; Y10S585/00; Y10S585/929; Y10S585/93; Y10S585/934
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
In an exothermic conversion process relied upon for producing gasoline boiling range components from a methanol rich feed which comprises: passing preheated methanol feed in contact with a catalyst and under conditions selective for restricting the conversion of methanol to a product comprising dimethyl ether, combining a light hydrocarbon gasiform diluent with said product comprising dimethyl ether in an amount which will dissipate exothermic heat released upon subsequent contact with a ZSM-5 type crystalline zeolite conversion catalyst and contacting said ether comprising product and said light hydrocarbon diluent with a ZSM-5 type crystalline zeolite under conditions selective for converting said ether to products boiling in the gasoline boiling range.
Claim 2
Dependent Claim
109 words
In an exothermic conversion process relied upon for producing gasoline boiling range components from a methanol rich feed which comprises: passing preheated methanol feed in contact with a catalyst and under conditions selective for restricting the conversion of methanol to a product comprising dimethyl ether, combining a light hydrocarbon gasiform diluent with said product comprising dimethyl ether in an amount which will dissipate exothermic heat released upon subsequent contact with a ZSM-5 type crystalline zeolite conversion catalyst and contacting said ether comprising product and said light hydrocarbon diluent with a ZSM-5 type crystalline zeolite under conditions selective for converting said ether to products boiling in the gasoline boiling range.
Claim 3
Dependent Claim
36 words
The process of claim 1 wherein a sequence of fixed catalyst beds is relied upon to effect said conversions and the temperature of the effluent obtained from said first bed of catalyst is essentially catalyst limited.
Claim 4
Dependent Claim
35 words
The process of claim 1 wherein the product comprising dimethyl ether is in equilibrium with methanol and water and the total equilibrium mixture is passed with said diluent to said second stage of catalyst contact.
Claim 5
Dependent Claim
37 words
The process of claim 1 wherein a gamma alumina is relied upon to produce said product comprising dimethyl ether and a ZSM-5 type crystalline zeolite is employed to form gasoline boiling range components comprising aromatics and iso-paraffins.
Claim 6
Dependent Claim
24 words
The process of claim 1 wherein the ether comprising product is adjusted to a temperature of about 600°F. before contacting the crystalline zeolite catalyst.
Claim 7
Dependent Claim
16 words
The process of claim 1 wherein the hydrocarbon diluent comprises C 5 and lower boiling hydrocarbons.
Claim 8
Dependent Claim
11 words
The process of claim 1 wherein the crystalline zeolite is ZSM-5.
Claim 9
Dependent Claim
28 words
The process of claim 1 wherein sufficient diluent is employed to restrict the temperature of the effluent from the crystalline zeolite contact step not to exceed about 850°F.
Claim 10
Dependent Claim
17 words
The process of claim 1 wherein the methanol charge contains up to about 16 weight percent water.
References Cited (Backward Citations)
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US3728408A
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US3760024A
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US3756942A
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US3984105A
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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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |