US4886918A
Expired / Lapsed
US
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Olefin hydration and etherification process employing serially staged olefin introduction
Assignee: Mobil Oil AS
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Filing: 1989-05-03
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Granted: 1989-12-12
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Expires: 2009-05-03
Abstract
Abstract Light olefin is introduced at multiple points of entry into a conversion unit subdivided into first and second reaction zones. Reaction of olefin with water takes place in the first reaction zone under conditions intended to promote the production of alcohol therein and in the second reaction zone, alcohol produced in the first reaction zone is both dehydrated and reacted with olefin under conditions intended to promote the production of ether therein. The same or different shape selective acidic zeolites are employed as catalysts in both reaction zones.
Inventors
- 👤 Charles M. Sorensen
- 👤 Philip Varghese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:14
CPC Classifications
C; C12; C12C; C12C11/00; C12C11/02; C07; C07C; C07C29/00; C07C29/03; C07C29/04; C07C41/00; C07C41/01; C07C41/05; C07C41/06
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
156 words
A process for producing ether(s) or mixture of ether(s) and alcohol(s) which comprises: (a) introducing a feed containing a substantial amount of at least one light olefin into an olefin conversion unit possessing first and second interconnected reaction zones, said feed being introduced into each of said first and second reaction zones at at least one point of entry therein, said first and second reaction zones each containing a quantity of shape-selective acidic zeolite catalyst; (b) introducing water into the first reaction zone and maintaining the zone under conditions conducive to the reaction of light olefin with water to produce alcohol therein; (c) introducing at least a portion of the alcohol produced in the first reaction zone into the second reaction zone and maintaining the second reaction zone under conditions conducive to the dehydration of alcohol and the reaction of alcohol with light olefin to produce essentially pure ether or ether in admixture with alcohol therein.
Claim 2
Dependent Claim
156 words
A process for producing ether(s) or mixture of ether(s) and alcohol(s) which comprises: (a) introducing a feed containing a substantial amount of at least one light olefin into an olefin conversion unit possessing first and second interconnected reaction zones, said feed being introduced into each of said first and second reaction zones at at least one point of entry therein, said first and second reaction zones each containing a quantity of shape-selective acidic zeolite catalyst; (b) introducing water into the first reaction zone and maintaining the zone under conditions conducive to the reaction of light olefin with water to produce alcohol therein; (c) introducing at least a portion of the alcohol produced in the first reaction zone into the second reaction zone and maintaining the second reaction zone under conditions conducive to the dehydration of alcohol and the reaction of alcohol with light olefin to produce essentially pure ether or ether in admixture with alcohol therein.
Claim 3
Dependent Claim
47 words
The process of claim 1 wherein the zeolite in each reaction zone is the same or different zeolite selected from the group consisting of zeolites possessing a Constraint Index of above about 2 to about 12 and zeolites possessing a Constraint Index of about 2 or less.
Claim 4
Dependent Claim
47 words
The process of claim 2 wherein the zeolite in each reaction zone is the same or different zeolite selected from the group consisting of zeolites ZSM-5, ZSM-11, ZSM-23, ZSM-35, ZSM-38, Beta, X, L, Y, USY, REY, Deal Y, Re Deal Y, ZSM-3, ZSM-4, ZSM-12, ZSM-20 and ZSM-50.
Claim 5
Dependent Claim
60 words
The process of claim 1 wherein the zeolite in the first reaction zone is selected from the group consisting of zeolites ZSM-5, ZSM-11, ZSM-23, ZSM-35 and ZSM-38 and the zeolite in the second reaction zone is selected from the group consisting of zeolites Beta, X, L, Y, USY, REY, Deal Y, RE Deal Y, ZSM-3, ZSM-4, ZSM-12, ZSM-20; and ZSM-50.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein the olefin feed contains a mixture of light olefins.
Claim 7
Dependent Claim
19 words
The process of claim 1 wherein the olefin component of the feed contains from two to seven carbon atoms.
Claim 8
Dependent Claim
27 words
The process of claim 1 wherein the olefin feed contains at least one olefin selected from the group consisting of ethylene, propylene, butenes, pentenes, hexenes and heptenes.
Claim 9
Dependent Claim
17 words
The process of claim 1 wherein the olefin feed is gas plant off-gas containing ethylene and propylene.
Claim 10
Dependent Claim
16 words
The process of claim 1 wherein the olefin feed is naphtha cracker off-gas containing light olefins.
Claim 11
Dependent Claim
19 words
The process of claim 1 wherein the olefin feed is light catalytic cracked gasoline containing pentenes, hexenes and heptenes.
Claim 12
Dependent Claim
23 words
The process of claim 1 wherein the temperature in the first and/or second reaction zone is from about 50° to about 300° C.
Claim 13
Dependent Claim
23 words
The process of claim 1 wherein the temperature in the first and second reaction zone is from about 90° to about 220° C.
Claim 14
Dependent Claim
23 words
The process of claim 1 wherein the temperature in the first and/or second reaction zone is from about 110° to about 200° C.
Claim 15
Dependent Claim
23 words
The process of claim 1 wherein the total system pressure in the first and/or second reaction zone is at least about 5 atm.
Claim 16
Dependent Claim
23 words
The process of claim 1 wherein the total system pressure in the first and/or second reaction zone is at least about 20 atm.
Claim 17
Dependent Claim
23 words
The process of claim 1 wherein the total system pressure in the first and/or second reaction zone is at least about 40 atm.
Claim 18
Dependent Claim
29 words
The process of claim 1 wherein the overall mole ratio of water to total olefin in the first and/or second reaction zone is from about 0.1 to about 30.
Claim 19
Dependent Claim
29 words
The process of claim 1 wherein the overall mole ratio of water to total olefin in the first and/or second reaction zone is from about 0.2 to about 15.
Claim 20
Dependent Claim
29 words
The process of claim 1 wherein the overall mole ratio of water to total olefin in the fist and/or second reaction zone is from about 0.3 to about 5.
Claim 21
Dependent Claim
22 words
The process of claim 1 wherein the LHSV in the first and/or second reaction zone is from about 0.1 to about 10.
Claim 22
Dependent Claim
20 words
The process of claim 1 wherein the zeolite catalyst in either or both reaction zones is composited with a binder.
Claim 23
Dependent Claim
23 words
The process of claim 1 wherein the zeolite catalyst in either or both reaction zones is composited with alumina or silica as binder.
Claim 24
Dependent Claim
46 words
The process of claim 1 wherein the zeolite catalyst in either or both reaction zones is composited with at least an extrusion-facilitating amount of a low acidity refractory oxide binder in a colloidal state and which is substantially free of alkali metal base and/or basic salt.
Claim 25
Dependent Claim
18 words
The process of claim 1 wherein product alcohol(s) are recovered and introduced into at least one reaction zone.
Claim 26
Dependent Claim
17 words
The process of claim 1 wherein product alcohol(s) are recovered and introduced into the second reaction zone.
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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) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |