Patent US4814519A successfully refreshed from Google Patents.
US4814519A
Expired / Lapsed
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Production of ethers from olefins
Assignee: Mobil Oil AS
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Filing: 1987-12-30
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Granted: 1989-03-21
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Expires: 2007-12-30
Abstract
Abstract A process for the production of ethers from an olefin containing feedstock. The process includes two-stages for the production of ethers which comprises, in a first stage, isomerizing an olefin containing feedstock over a thermally stable layered metal oxide type catalyst having interspathic polymeric silica between the layers so as to produce iso-olefins and then, in a second stage, reacting the resultant iso-olefins with alcohols in the presence of an etherification catalyst so as to produce ethers from the iso-olegins.
Inventors
- 👤 Mohsen N. Harandi
- 👤 Hartley Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:57
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/05; C07C41/06; C07C5/00; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2772
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
106 words
A process for producing ethers from lower olefins, the process comprising, in a first stag, contacting a reaction mixture comprising olefins under reaction conditions of elevated temperature and pressure with a catalyst to produce an isoolefin product stream, the catalyst comprising a layered titanate composition which contains interspathic polymeric silica, the reaction conditions comprising a temperature of about 350° to 750° F., a moderate pressure of about 0 to 200 psig, and a WHSV of up to about 80, and then, in a second stage, contacting the iso-olefins from the first stage with an alcohol and an etherification catalyst under reaction conditions including an elevated temperature.
Claim 2
Dependent Claim
106 words
A process for producing ethers from lower olefins, the process comprising, in a first stag, contacting a reaction mixture comprising olefins under reaction conditions of elevated temperature and pressure with a catalyst to produce an isoolefin product stream, the catalyst comprising a layered titanate composition which contains interspathic polymeric silica, the reaction conditions comprising a temperature of about 350° to 750° F., a moderate pressure of about 0 to 200 psig, and a WHSV of up to about 80, and then, in a second stage, contacting the iso-olefins from the first stage with an alcohol and an etherification catalyst under reaction conditions including an elevated temperature.
Claim 3
Dependent Claim
36 words
The process of claim 1, wherein said second stage reaction conditions comprise a temperature of 40° to 200° C., a pressure bf about 5 to about 50 atmospheres, and a WHSV of about 0.1 to 24.
Claim 4
Dependent Claim
46 words
The process of claim 1, wherein said layered titanate composition is prepared by swelling a layered trititanate with an alkylamine, contacting the swelled trititanate with a tetraalkylorthosilicate to introduce oxides of silicon between the layers of said trititanate, and exposing the resulting trititanate to hydrolysis conditions.
Claim 5
Dependent Claim
26 words
The process of claim 3, wherein said layered trititanate is Na 2 Ti 3 O 7 , said alkylamine is n-octylamine, and said tetraalkylorthosilicate is tetraethylorthosilicate.
Claim 6
Dependent Claim
15 words
The process of claim 4, wherein said layered trititanate is hydrogen-exchanged prior to said swelling.
Claim 7
Dependent Claim
15 words
The process of claim 5, wherein said layered trititanate is hydrogen-exchanged prior to said swelling.
Claim 8
Dependent Claim
23 words
The process of claim 1, wherein the olefin of the reaction mixture includes at least one of C 2 to C 6 olefins.
Claim 9
Dependent Claim
23 words
The process of claim 1, wherein the olefin of the reaction mixture includes at least one of C 4 and C 5 olefins.
Claim 10
Dependent Claim
19 words
The process of claim 1, wherein said catalyst comprises about 0.1 to 90 weight percent of an inorganic binder.
Claim 11
Dependent Claim
20 words
The process of claim 1, wherein the catalyst for the second stage etherification catalyst includes a porous crystalline silicate catalyst.
Claim 12
Dependent Claim
17 words
The process of claim 10, wherein the catalyst for the second stage includes a porous crystalline aluminosilicate.
Claim 13
Dependent Claim
11 words
The process of claim 11, wherein the zeolite is zeolite beta.
Claim 14
Dependent Claim
104 words
The process of claim 1, wherein said layered titanate composition is prepared from a silicotitanate having the x-ray diffraction pattern set forth in the following Table: ______________________________________
Line 2 Theta 2 Theta 100/I/I.sub.o
Number Minimum Maximum (Relative Intensity) Range
______________________________________
1 less than or equal to 8.7
VS to W
2 11.1-14.3 S to W
3 11.8-15.2 M to W
4 24.5-25.0 VS to W
5 25.0-25.4 M to W
6 28.5-30.2 VS to W
7 29.8-30.6 S to W
8 33.0-33.5 S to W
9 43.2-43.5 M to W
10 44.2-44.7 M to W
11 48.5-48.9 VS to M
12 52.7-52.9 W
______________________________________
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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) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |