US4052479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of methanol to olefinic components
Assignee: Mobil Oil AS
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Filing: 1976-05-13
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Granted: 1977-10-04
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Expires: 1996-05-13
Abstract
Abstract A method and sequence of process steps is described for effecting the conversion of lower alcohols comprising methanol, ethanol, and propanol to primarily olefin boiling range component under conditions to significantly extract reaction heat and selectively control the restructuring of the alcohol feed through the production of ethers and particularly olefins.
Inventors
- 👤 Clarence D. Chang
- 👤 William H. Lang
- 👤 Anthony J. Silvestri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:27
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/18; C; C07; C07C; C07C1/00; C07C1/20; C10; C10G; C10G3/00; C10G3/42; C10G3/44; C10G3/48; C10G3/49; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; C07C2521/00; C07C2521/02; C07C2521/04; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; C07C2529/42; C07C2529/44; C07C2529/46; C07C2529/65; C07C2529/70; C10G2300/00; C10G2300/40; C10G2300/4006; C10G2300/4012; C10G2300/4018; C10G2300/4081; C10G2300/80; C10G2300/805; C10G2400/00; C10G2400/20; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/903
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
137 words
A method for producing olefins from a feed selected from the group consisting of lower alcohols, one or more ether dehydration products of lower alcohols and mixtures of one or more lower alcohols and an ether derivative thereof which comprises passing said feed in contact with a crystalline aluminosilicate zeolite having a pore dimension greater than about 5 Angstroms, a silica to alumina ratio of at least about 12, and a constraint index of about 1 to 12, said contact being carried out at a temperature within the range of 500-900° F, a pressure from atmospheric up to about 100 psi, a space velocity of 50-1000 LHSV, said temperature and space velocity being selected within said ranges so as to restrict conversion of the feed within the range of 5 to 25%, and recovering an olefin product.
Claim 2
Independent Claim
137 words
A method for producing olefins from a feed selected from the group consisting of lower alcohols, one or more ether dehydration products of lower alcohols and mixtures of one or more lower alcohols and an ether derivative thereof which comprises passing said feed in contact with a crystalline aluminosilicate zeolite having a pore dimension greater than about 5 Angstroms, a silica to alumina ratio of at least about 12, and a constraint index of about 1 to 12, said contact being carried out at a temperature within the range of 500-900° F, a pressure from atmospheric up to about 100 psi, a space velocity of 50-1000 LHSV, said temperature and space velocity being selected within said ranges so as to restrict conversion of the feed within the range of 5 to 25%, and recovering an olefin product.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein unconverted feed is recycled at a recycle/fresh feed ratio in the range of 6-8/1.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein the velocity of the feed passed in contact with the catalyst is at least 100 LHSV.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein said aliphatic ether is dimethyl ether.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein said aliphatic ether-containing feed comprises dimethyl ethyl, water, and methanol.
Claim 7
Dependent Claim
22 words
The method of claim 1 wherein production of the olefin product is enhanced by operating at a reaction temperature below 800° F.
References Cited (Backward Citations)
SU186444A1
Cited
US3894106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |