Patent US3758615A successfully refreshed from Google Patents.
US3758615A
Expired / Lapsed
US
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Process for the preparation of alcohols
Assignee: Tokuyama Corp
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Filing: 1970-05-05
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Granted: 1973-09-11
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Expires: 1990-05-05
Abstract
Abstract A process for the preparation of mono hydric alcohols from olefins which comprises contacting a monoolefin having two to four carbon atoms with an aqueous solution containing silicotungstic radicals at a concentration higher than a molar concentration of 1/40,000 but not exceeding the saturation concentration and having a pH of 2.0 to 4.5, at an elevated temperature sufficient to initiate the hydration of said olefin.
Inventors
- 👤 Y Izumi
- 👤 Y Kawasaki
- 👤 M Tani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:01
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/03; C07C29/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
43 words
The process of claim 1 wherein said contact of the alkene with the aqueous solution containing silicotungstic radicals is effected at a reaction temperature of 150* to 370*C. and under a pressure not lower than the saturated vapor pressure at said reaction temperature.
Claim 2
Dependent Claim
36 words
The process of claim 1 wherein the contact of said olefin with the aqueous solution containing silicotungstic radicals is effected at a temperature of 170*C to 350*C. and under a pressure of 100 to 500 Kg/cm2.
Claim 3
Dependent Claim
20 words
The process as of claim 1 wherein the aqueous solution containing silicotungstic radicals is an aqueous solution of silicotungstic acid.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein the aqueous solution containing silicotungstic radicals is an aqueous solution of a water-soluble acid silicotungstate.
Claim 5
Dependent Claim
42 words
The process of claim 5 wherein the aqueous solution of a water-soluble acid silicotungstate is an aqueous solution of an acid silicotungstate of at least one metal selected from the group consisting of sodium, potassium, lithium, magnesium, calcium, barium, zinc and aluminum.
Claim 6
Dependent Claim
17 words
The process of claim 1 wherein said alkene is ethylene and ethanol is prepared as the product.
Claim 7
Dependent Claim
17 words
The process of claim 1 wherein said alkene is propylene and isopropanol is prepared as the product.
Claim 8
Dependent Claim
18 words
The process of claim 1 wherein said alkene is butene is and butanol is prepared as the product.
Claim 9
Dependent Claim
47 words
The process of claim 8 wherein propylene is contacted at a reaction temperature of 200* to 300*C. and under a pressure not lower than the saturated vapor pressure at said reaction temperature, with an aqueous solution containing silicotungstic radicals at a molar concentration of 1/3000 to 1/100.
References Cited (Backward Citations)
US2162913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |