US3232848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of alcohols
Assignee: Union Carbide Corp
•
Filing: 1958-12-16
•
Granted: 1966-02-01
•
Expires: 1978-12-16
Abstract
No abstract record available.
Inventors
- 👤 Philip C Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:12
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A METHOD FOR REFINING SYNTHETICALLY PRODUCED WATERINSOLUBLE, HEAT-STABLE ALCOHOLS WHICH COMPRISES INTRODUCING A CRUDE SYNTHETIC ALCOHOL CONTAINING UNDESIRABLE CONTAMINANTS AND COLOR-FORMING IMPURITIES IN A FIRST DISTILLATION ZONE, MAINTAINING IN THE HEAD OF SAID ZONE A TEMPERATURE ABOUT THE BOILING POINT OF THE ALCOHOL, REMOVING FROM SAID ZONE AN OVERHEAD VAPOR STREAM RELATIVELY FREE OF HIGH-BOILING BOTTOMS MATERIALM INTRODUCING SAID OVERHEAD STREAM TO A SECOND DISTILLATION ZONE MAINTAINED AT A TEMPERATURE ABOUT THE BOILING RANGE OF THE ALCOHOL, REFLUXING AND DISTILLING SAID OVERHEAD STREAM IN THE PRESENCE OF A PHOSPHORUS-CONTAININGLEWIS ACID, REMOVING VOLATILE MATERIALS BOILING BELOW THE ALCOHOL PRODUCT AS AN OVERHEAD STREAM, AND THEREAFTER RECOVERING AN ALCOHOL PRODUCT SUBSTANTIALLY FREE OF UNDESIRABLE CONTAMINANTS AND COLOR-FORMIANG IMPURITIES.
Claim 2
Independent Claim
116 words
A METHOD FOR REFINING SYNTHETICALLY PRODUCED WATERINSOLUBLE, HEAT-STABLE ALCOHOLS WHICH COMPRISES INTRODUCING A CRUDE SYNTHETIC ALCOHOL CONTAINING UNDESIRABLE CONTAMINANTS AND COLOR-FORMING IMPURITIES IN A FIRST DISTILLATION ZONE, MAINTAINING IN THE HEAD OF SAID ZONE A TEMPERATURE ABOUT THE BOILING POINT OF THE ALCOHOL, REMOVING FROM SAID ZONE AN OVERHEAD VAPOR STREAM RELATIVELY FREE OF HIGH-BOILING BOTTOMS MATERIALM INTRODUCING SAID OVERHEAD STREAM TO A SECOND DISTILLATION ZONE MAINTAINED AT A TEMPERATURE ABOUT THE BOILING RANGE OF THE ALCOHOL, REFLUXING AND DISTILLING SAID OVERHEAD STREAM IN THE PRESENCE OF A PHOSPHORUS-CONTAININGLEWIS ACID, REMOVING VOLATILE MATERIALS BOILING BELOW THE ALCOHOL PRODUCT AS AN OVERHEAD STREAM, AND THEREAFTER RECOVERING AN ALCOHOL PRODUCT SUBSTANTIALLY FREE OF UNDESIRABLE CONTAMINANTS AND COLOR-FORMIANG IMPURITIES.
References Cited (Backward Citations)
US736098A
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US2576030A
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US2569671A
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US2726199A
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US2696508A
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US2757203A
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US2837468A
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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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |