US2715646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of dhsopropylbenzene hydroperoxides
Assignee: Hercules Powder Co
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Filing: 1949-05-09
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Granted: 1955-08-16
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Expires: 1969-05-09
Abstract
No abstract record available.
Inventors
- 👤 Hawkins Edwin George Edward
- 👤 Quin Denis Cheselden
- 👤 Salt Francis Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:04
CPC Classifications
C; C07; C07C; C07C409/00; C07C409/02; C07C409/04; C07C409/08; C07C409/12; C07C407/00; C07C407/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
PROCESS FOR THE MANUFACTURE OF DI-ISOPROPYL BENZENE HYDROPEROXIDES WHICH COMPRISES BRINGING DI-ISOPROPYL BENZENE IN THE SUBSTANTIALLY HOMOGENEOUS LIQUID PHASE AT TEMPERATURES BETWEEN 110* AND 140* C. INTO INTIMATE CONTACT WITH FREE OXYGEN-CONTAINING GASES IN THE SUBSTANTIAL ABSENCE OF OXIDATION CATALYSTS OTHER THAN ORGANIC PEROXIDES, ADDING TO THE REACTION MIXTURE ALKALINE SUBSTANCES WITH REACT WITH SAID ACID SUBSTANCES FORMED DURING THE OXIDATION REACTION, WHEREBY THESE ACID SUBSTANCES ARE NEUTRALIZED REMOVING THE PARA- AND META-DI-ISOPROPYL BENZENE DI-HYDROPEROXIDES FROM THE LIQUID REACTION MIXTURE, THEN TREATING THE REMAINING REACTION MIXTURE WITH AQUEOUS SODIUM, HYDROXIDE SOLUTION OF CONCENTRATION EXCEEDING 15 PER CENT WHEREBY THE SODIUM SALT OF THE PARA-DI-ISOPROPYL BENZENE MONO-HYDROPEROXIDE IS PRECIPITATED AND RECOVERING THE META-MONO-HYDROPEROXIDE FROM ITS SOLUTION IN UNCHANGED DI-ISOPROPYL BENZENE.
Claim 2
Dependent Claim
119 words
PROCESS FOR THE MANUFACTURE OF DI-ISOPROPYL BENZENE HYDROPEROXIDES WHICH COMPRISES BRINGING DI-ISOPROPYL BENZENE IN THE SUBSTANTIALLY HOMOGENEOUS LIQUID PHASE AT TEMPERATURES BETWEEN 110* AND 140* C. INTO INTIMATE CONTACT WITH FREE OXYGEN-CONTAINING GASES IN THE SUBSTANTIAL ABSENCE OF OXIDATION CATALYSTS OTHER THAN ORGANIC PEROXIDES, ADDING TO THE REACTION MIXTURE ALKALINE SUBSTANCES WITH REACT WITH SAID ACID SUBSTANCES FORMED DURING THE OXIDATION REACTION, WHEREBY THESE ACID SUBSTANCES ARE NEUTRALIZED REMOVING THE PARA- AND META-DI-ISOPROPYL BENZENE DI-HYDROPEROXIDES FROM THE LIQUID REACTION MIXTURE, THEN TREATING THE REMAINING REACTION MIXTURE WITH AQUEOUS SODIUM, HYDROXIDE SOLUTION OF CONCENTRATION EXCEEDING 15 PER CENT WHEREBY THE SODIUM SALT OF THE PARA-DI-ISOPROPYL BENZENE MONO-HYDROPEROXIDE IS PRECIPITATED AND RECOVERING THE META-MONO-HYDROPEROXIDE FROM ITS SOLUTION IN UNCHANGED DI-ISOPROPYL BENZENE.
References Cited (Backward Citations)
US1924786A
Cited
US2547938A
Cited
US2548435A
Cited
US2632773A
Cited
US2527640A
Cited
US2619510A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-15 | 1959-02-14 | 1959-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-15 | 1963-02-14 | 1963-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-15 | 1967-02-14 | 1967-08-16 | $7700.00 | Window Closed / Lapsed |