US3855320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of ziegler alcohols
Assignee: Vista Chemical Co
•
Filing: 1973-08-02
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Granted: 1974-12-17
•
Expires: 1993-08-02
Abstract
Abstract The higher linear primary alcohols prepared in accordance with Ziegler chemistry contain contaminant amounts of similarly boiling diols. Upon contacting a dehydration catalyst with the impure alcohol product, the diols present therein are selectively converted into substantially lower boiling derivatives readily separated from the desirable alcohols by conventional thermal fractionation practices.
Inventors
- 👤 B Leach
- 👤 K Motz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:30
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/02; C; C07; C07C; C07C29/00; C07C29/74; C07C29/88
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
63 words
AN IMPROVED METHOD FOR TREATING PRIMARY ALCOHOLS OBTAINED BY HYDROLYZING AN AIR-OXIDIZED MIXTURE OF ALUMINUM ALKYLS PREPARED BY GROWING ALUMINUM TRIETHYL IN THE PRESENCE OF ETHYLENE TO PROVIDE AN ALCOHOL PRODUCT ESSENTIALLY FREE OF DIHYDROXY COMPOUNDS WHEREIN THE IMPROVEMENT COMPRISES CONTACTING SAID PRIMARY ALCOHOLS IN THE LIQUID PHASE WITH A CALCIUM OXIDE ON ALUMINA CATALYST AT A TEMPERATURE BETWEEN ABOUT 170* AND 275*C.
Claim 2
Dependent Claim
63 words
AN IMPROVED METHOD FOR TREATING PRIMARY ALCOHOLS OBTAINED BY HYDROLYZING AN AIR-OXIDIZED MIXTURE OF ALUMINUM ALKYLS PREPARED BY GROWING ALUMINUM TRIETHYL IN THE PRESENCE OF ETHYLENE TO PROVIDE AN ALCOHOL PRODUCT ESSENTIALLY FREE OF DIHYDROXY COMPOUNDS WHEREIN THE IMPROVEMENT COMPRISES CONTACTING SAID PRIMARY ALCOHOLS IN THE LIQUID PHASE WITH A CALCIUM OXIDE ON ALUMINA CATALYST AT A TEMPERATURE BETWEEN ABOUT 170* AND 275*C.
Claim 3
Dependent Claim
25 words
A method in accordance with claim 1 wherein the modified catalyst is contacted with the alcohols at a temperature between about 215* and 250* C.
Claim 4
Dependent Claim
31 words
A method in accordance with claim 2 wherein the contacted alcohols are thermally stripped to remove essentially all components having a boiling point lower than the lowest boiling mono-alcohol present therein.
Claim 5
Dependent Claim
34 words
A method in accordance with claim 3 wherein the contacted alcohols are hydrogenated followed by thermally stripping to remove substantially all components having a boiling point lower than the lowest boiling monoalcohol present therein.
Claim 6
Dependent Claim
13 words
A method in accordance with claim 3 wherein the stripped alcohols are hydrogenated.
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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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |