US2915558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the separation of diisopropylbenzene dihydroperoxides
Assignee: Shell Development Co
•
Filing: 1958-02-26
•
Granted: 1959-12-01
•
Expires: 1978-02-26
Abstract
No abstract record available.
Inventors
- 👤 Alders Lucas
- 👤 Jan P Fortuin
- 👤 Mondria Hendrik
- 👤 Gerrit H Reman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:52
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
107 words
THE PROCESS FOR SEPARATING DIISOPROPYLBENZENE DIHYDROPEROXIDE FROM A MIXTURE COMPRISING SAID DIISOPROPYLBENZENE DIHYDROPEROXIDE IN ADMIXTURE WITH DIISOPROPYLBENZENE MONOHYDROPEROXIDE AND DIISOPROPYLBENZENE, WHICH COMPRISES EXTRACTING SAID MIXTURE AT A TEMPERATURE OF FROM ABOUT 15* TO ABOUT 25*C. WITH AN AQUEOUS SOLVENT CONSISTING ESSENTIALLY OF WATER CONTAINING FROM 30 TO 60% BY WEIGHT OF AN ALKANOL HAVING FROM ONE TO TWO CARBON ATOMS TO THE MOLECULE FLOWING COUNTERCURRENT TO A STREAM OF NORMALLY LIQUID HYDROCARBON SOLVENT, THEREBY FORMING AN EXTRACT PHASE CONSISTING ESSENTIALLY OF DIISOPROPYLBENZENE DIHYDROPEROXIDE AND AQUEOUS SOLVENT AND A RAFFINATE PHASE CONSISTING ESSENTIALLY OF DIISOPROPYLBENZENE MONOHYDROPEROXIDE, DIISOPROPYLBENZENE AND HYDROCARBON SOLVENT, AND SEPARATING DIISOPROPYLBENZENE DIHYDROPEROXIDE FROM SAID EXTRACT PHASE.
Claim 2
Dependent Claim
107 words
THE PROCESS FOR SEPARATING DIISOPROPYLBENZENE DIHYDROPEROXIDE FROM A MIXTURE COMPRISING SAID DIISOPROPYLBENZENE DIHYDROPEROXIDE IN ADMIXTURE WITH DIISOPROPYLBENZENE MONOHYDROPEROXIDE AND DIISOPROPYLBENZENE, WHICH COMPRISES EXTRACTING SAID MIXTURE AT A TEMPERATURE OF FROM ABOUT 15* TO ABOUT 25*C. WITH AN AQUEOUS SOLVENT CONSISTING ESSENTIALLY OF WATER CONTAINING FROM 30 TO 60% BY WEIGHT OF AN ALKANOL HAVING FROM ONE TO TWO CARBON ATOMS TO THE MOLECULE FLOWING COUNTERCURRENT TO A STREAM OF NORMALLY LIQUID HYDROCARBON SOLVENT, THEREBY FORMING AN EXTRACT PHASE CONSISTING ESSENTIALLY OF DIISOPROPYLBENZENE DIHYDROPEROXIDE AND AQUEOUS SOLVENT AND A RAFFINATE PHASE CONSISTING ESSENTIALLY OF DIISOPROPYLBENZENE MONOHYDROPEROXIDE, DIISOPROPYLBENZENE AND HYDROCARBON SOLVENT, AND SEPARATING DIISOPROPYLBENZENE DIHYDROPEROXIDE FROM SAID EXTRACT PHASE.
References Cited (Backward Citations)
US2812357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |