Patent US2114245A successfully refreshed from Google Patents.
US4866211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon conversion processes
Assignee: Phillips Petroleum Co
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Filing: 1987-02-10
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Granted: 1989-09-12
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Expires: 2007-02-10
Abstract
Abstract Steam active reforming catalyst is described which in addition to converting isoparaffins to isoolefins also isomerizes 1-olefins at least in part to internal olefins. In a combined steam active reforming and ether forming operation a 1-olefin containing stream can be recycled to the steam active reforming zone whereby this 1-olefin is converted to materials which in a separation step downstream from the ether forming reaction can be readily separated from the isoparaffin, the isolefin and the 1-olefin which are recycled to the steam active reforming zone. The steam active reforming catalyst thus has both the function of a reforming (dehydrogenation) catalyst and that of an isomerization catalyst for disposing of the 1-olefin byproduct and preventing its buildup in the operation.
Inventors
- 👤 Francis M. Brinkmeyer
- 👤 Donald F. Rohr, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:24
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/05; C07C41/06; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3335; C07C5/3337
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
218 words
Process to produce methyl-tert-butyl-ether by reacting isobutene and methanol in an ether forming zone in the presence of a catalyst under ether forming conditions which process comprises (a) passing an isobutane containing stream and steam into contact with a reforming catalyst comprising a catalyst base and a Group VIII metal in an isomerization and reforming zone at a temperature in the range of 950° F. to 1150° F. to convert at least some of the isobutane to isobutene, (b) withdrawing a reaction effluent from said isomerization and reforming zone, (c) passing at least a portion of said reaction effluent into an ether forming zone and reacting therein isobutene with methanol in the presence of an ether forming catalyst to form an methyl-tert-butyl-ether, (d) withdrawing methyl-tert-butyl-ether containing effluent from said ether forming zone and passing said effluent to a separation zone, (e) separating in said separation zone said ether containing effluent into (aa) a methyl-tert-butyl-ether containing product stream (bb) a 1-butene containing stream, and (cc) a 2-butene containing byproduct stream, (f) passing said 1-butene containing stream into said isomerization and reforming zone and into contact with said reforming catalyst such as to convert at least a portion of said 1-butene in said 1-butene containing stream and form 2-butene which is withdrawn from the separation zone as the by-product stream.
Claim 2
Dependent Claim
218 words
Process to produce methyl-tert-butyl-ether by reacting isobutene and methanol in an ether forming zone in the presence of a catalyst under ether forming conditions which process comprises (a) passing an isobutane containing stream and steam into contact with a reforming catalyst comprising a catalyst base and a Group VIII metal in an isomerization and reforming zone at a temperature in the range of 950° F. to 1150° F. to convert at least some of the isobutane to isobutene, (b) withdrawing a reaction effluent from said isomerization and reforming zone, (c) passing at least a portion of said reaction effluent into an ether forming zone and reacting therein isobutene with methanol in the presence of an ether forming catalyst to form an methyl-tert-butyl-ether, (d) withdrawing methyl-tert-butyl-ether containing effluent from said ether forming zone and passing said effluent to a separation zone, (e) separating in said separation zone said ether containing effluent into (aa) a methyl-tert-butyl-ether containing product stream (bb) a 1-butene containing stream, and (cc) a 2-butene containing byproduct stream, (f) passing said 1-butene containing stream into said isomerization and reforming zone and into contact with said reforming catalyst such as to convert at least a portion of said 1-butene in said 1-butene containing stream and form 2-butene which is withdrawn from the separation zone as the by-product stream.
Claim 3
Dependent Claim
28 words
Process in accordance with claim 1 wherein the mole ratio of 1-butene to isobutane in said isomerization and reforming zone is in the range of 1/10 to 1/10000.
Claim 4
Dependent Claim
68 words
Process in accordance with claim 1 wherein the catalyst base comprises a zinc aluminate spinel, wherein the Group VIII metal comprises platinum in an amount of about 0.1 to about 5 parts by weight per 100 parts of weight of the catalyst base, and wherein the reforming catalyst further comprises tin in an amount of 0.1 to 1 parts by weight per 100 parts by weight of support.
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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) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |