US4864064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of tert. alkyl-tert. aralkyl peroxides
Assignee: United Initiators GmbH and Co KG
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Filing: 1987-09-23
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Granted: 1989-09-05
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Expires: 2007-09-23
Abstract
Abstract Disclosed is a process for the preparation of tert. alkyl-tert. aralkyl peroxides with the general formula ##STR1## where R represents an alkyl radical with 1 to 4 C-atoms, R', R" and R'" represent the same or different alkyl radicals with 1 to 5 C-atoms and n is a number from 1 to 3, by reacting an olefin with the general formula ##STR2## with a tert. alkyl hydroperoxide with the general formula ##STR3## where R, R' and R" and R'" and n having the meaning indicated above the presence of aqueous hydrochloric acid.
Inventors
- 👤 Eberhard Hagel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:02
CPC Classifications
C; C07; C07C; C07C409/00; C07C409/16; C07C407/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
105 words
A process for the preparation of tert.alkyl-tert.aralkyl peroxides of the general formula ##STR10## where R represents an alkyl radical with 1 to 4 C-atoms, R', R" and R'" represent the same or different alkyl radicals with 1 to 5 C-atoms and n is a number between 1 and 3, comprising: reacting an olefin of the general formula ##STR11## with a tert.alkyl hydroperoxide of the general formula ##STR12## where R, R', R" and R'" and n have the meaning indicated above, in the presence of aqueous hydrochloric acid in an amount of 0.5 to 2 mole of the hydrochloric acid per mole of olefinic double bond.
Claim 2
Dependent Claim
105 words
A process for the preparation of tert.alkyl-tert.aralkyl peroxides of the general formula ##STR10## where R represents an alkyl radical with 1 to 4 C-atoms, R', R" and R'" represent the same or different alkyl radicals with 1 to 5 C-atoms and n is a number between 1 and 3, comprising: reacting an olefin of the general formula ##STR11## with a tert.alkyl hydroperoxide of the general formula ##STR12## where R, R', R" and R'" and n have the meaning indicated above, in the presence of aqueous hydrochloric acid in an amount of 0.5 to 2 mole of the hydrochloric acid per mole of olefinic double bond.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the hydrochloric acid is used in a concentration of 20 to 40 wt.-%.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein the hydrochloric acid is used in a concentration of 25 to 37 wt.-%.
Claim 5
Dependent Claim
19 words
The process of claim 2 wherein the hydrochloric acid is used in a concentration of 25 to 37 wt.-%.
Claim 6
Dependent Claim
16 words
The process of claim 1 wherein the olefin of general formula II is an alpha-methyl styrene.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein the tert.alkyl hydroperoxide is tert.butyl hydroperoxide.
Claim 8
Dependent Claim
14 words
The process of claim 1 wherein the reaction is carried out at ambient temperatures.
Claim 9
Dependent Claim
24 words
The process of claim 1 wherein the reaction is carried out at a temperature in the range of from 15° C. to 35° C.
Claim 10
Dependent Claim
24 words
The process of claim 1 wherein the reaction is carried out at a temperature in the range of from 15° C. to 45° C.
Claim 11
Dependent Claim
20 words
The process of claim 1 wherein R, R', R" and R'" are independently alkyls of 1 or 2 carbon atoms.
Claim 12
Dependent Claim
26 words
The process of claim 1 wherein the reaction is carried out with 1.5 to 2 moles of the tert.alkyl hydroperoxide per mole of olefinic double bond.
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) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |