US2542985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of acetophenone from alpha-methyl styrene
Assignee: Houdry Process Corp
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Filing: 1947-01-31
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Granted: 1951-02-27
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Expires: 1967-01-31
Abstract
No abstract record available.
Inventors
- 👤 Jr George R Bond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:12
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/51; C07C45/516; C07C45/78; C07C45/81; C07C45/82; C07C45/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE METHOD OF PRODUCING ACETOPHENONE WHICH COMPRISES REACTING A HYDROCARBON FRACTION RICH IN A-METHYL STYRENE WITH N2O4 TO FORM A NITROSATE OF SAID A-METHYL STYRENE, CONTINUING THE REACTION UNDER CONTROLLED CONDITIONS MAINTAINING THE TEMPERATURE THEREOF NOT IN EXCESS OF 100* F. AND UNTIL EXCESS N2O4 FORMS INDICATING COMPLETION OF THE REACTION, STREAM DISTILLING THE PRODUCT TO SEPARATE UNREACTED HYDROCARBONS LEAVING A RESIDUE CONTAINING SAID NITROSATE, TREATING SAID RESIDUE WITH ABOUT TWICE ITS VOLUME OF 10% NAOH SOLUTION AND STEAM DISTILLING THE ALKALINE REACTION MASS, THEREBY OBTAINING A DISTILLATE CONTAINING ACETOPHENONE.
Claim 2
Independent Claim
90 words
THE METHOD OF PRODUCING ACETOPHENONE WHICH COMPRISES REACTING A HYDROCARBON FRACTION RICH IN A-METHYL STYRENE WITH N2O4 TO FORM A NITROSATE OF SAID A-METHYL STYRENE, CONTINUING THE REACTION UNDER CONTROLLED CONDITIONS MAINTAINING THE TEMPERATURE THEREOF NOT IN EXCESS OF 100* F. AND UNTIL EXCESS N2O4 FORMS INDICATING COMPLETION OF THE REACTION, STREAM DISTILLING THE PRODUCT TO SEPARATE UNREACTED HYDROCARBONS LEAVING A RESIDUE CONTAINING SAID NITROSATE, TREATING SAID RESIDUE WITH ABOUT TWICE ITS VOLUME OF 10% NAOH SOLUTION AND STEAM DISTILLING THE ALKALINE REACTION MASS, THEREBY OBTAINING A DISTILLATE CONTAINING ACETOPHENONE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |