US3873625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of hydroperoxides by autoxidation
Assignee: Texas Petrochemicals Corp
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Filing: 1971-04-28
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Granted: 1975-03-25
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Expires: 1991-04-28
Abstract
Abstract In autoxidation of tertiary, aryl or cycloalkanes the selectivity for organic hydroperoxides can be substantially increased by carrying out the reaction in the presence of metalfree phthalocyanine or chlorophyll. For example, an autoxidation of isopentane with 0.05 wt. % phthalocyanine at 9.1 mole % conversion gave selectivities of t-amyl hydroperoxides - 83.6 mole % acetone - 12.3 mole % and t-amyl alcohol - 1.7 mole %. The same reaction without the phthalocyanine at 10.0 mole % conversion gave selectivities of t-amyl hydroperoxide - 56.8 mole % acetone - 31.2 mole % and t-amyl alcohol - 4.8 mole %.
Inventors
- 👤 Bruno J Barone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:40
CPC Classifications
C; C07; C07C; C07C409/00; C07C409/02; C07C409/14; C07C407/00; C07C409/04; C07C409/08; C07C409/10; C07C2601/00; C07C2601/06; C07C2601/08; C07C2601/12; C07C2601/14; C07C2601/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
A PROCESS FOR PREPARING ORGANIC HYDROPEROXIDES COMPRISING CONTACTING A TERTIARY ALKANE, ARALKANE OR CYCLOALKANE SELECTED FROM THE GROUP CONSISTING OF ISOBUTANE, ISOPENTANE ISOHEXANE, ISOHEPTANE, ISOOCTANE, ETHYL BENZENE, CUMENE, CYCLOPENTANE, CYCLOHEXANE AND CYCLOHEPTANE WITH MOLECULAR OXYGEN IN LIQUID PHASE AT A TEMPERATURE OF 145*-170*C. IN THE PRESENCE OF FROM ABOUT 0.025 TO 1.0 WEIGHT PERCENT BASED ON THE TERTIARY ALKANE, ARALKANE OR CYCLOALKANE FEED OF SOLID METAL-FREE PHTHALOCYANINE AS A FINE POWDER BELOW ABOUT 20 MICRON SIZE DISPERSED IN THE REACTION MIXTURE.
Claim 2
Dependent Claim
81 words
A PROCESS FOR PREPARING ORGANIC HYDROPEROXIDES COMPRISING CONTACTING A TERTIARY ALKANE, ARALKANE OR CYCLOALKANE SELECTED FROM THE GROUP CONSISTING OF ISOBUTANE, ISOPENTANE ISOHEXANE, ISOHEPTANE, ISOOCTANE, ETHYL BENZENE, CUMENE, CYCLOPENTANE, CYCLOHEXANE AND CYCLOHEPTANE WITH MOLECULAR OXYGEN IN LIQUID PHASE AT A TEMPERATURE OF 145*-170*C. IN THE PRESENCE OF FROM ABOUT 0.025 TO 1.0 WEIGHT PERCENT BASED ON THE TERTIARY ALKANE, ARALKANE OR CYCLOALKANE FEED OF SOLID METAL-FREE PHTHALOCYANINE AS A FINE POWDER BELOW ABOUT 20 MICRON SIZE DISPERSED IN THE REACTION MIXTURE.
Claim 3
Dependent Claim
12 words
The process according to claim 1 wherein the temperature is between 150*-160*C.
Claim 4
Dependent Claim
16 words
The process according to claim 1 wherein the pressure is sufficient to maintain the liquid phase.
Claim 5
Dependent Claim
15 words
The process according to claim 3 wherein the pressure is atmospheric to about 1,000 psi.
Claim 6
Dependent Claim
19 words
The process according to claim 1 wherein the tertiary alkane is isopentane and the hydroperoxide is tertiary amyl hydroperoxide.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |