Patent US3725438A successfully refreshed from Google Patents.
US3725438A
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Production of cyclic acetals
Assignee: Texas Petrochemicals Corp
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Filing: 1970-10-16
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Granted: 1973-04-03
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Expires: 1990-10-16
Abstract
Abstract Formation of cyclic acetal compounds of the formula BY REACTING A CARBONYL COMPOUND OF THE FORMULA R''R''''C O with a second reactant which is WHEREIN R'' and R'''' are selected from the group consisting of hydrogen and an acyclic aliphatic hydrocarbon radical in the presence of a catalyst selected from the group consisting of compounds of Periodic Table Groups VB and VIB. For example acetaldehyde is reacted in liquid phase with ethylene oxide in the presence of molybdenum acetyl acetonate to form 2-methyl-1, 3-dioxolane.
Inventors
- 👤 B Barone
- 👤 W Brill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:30
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
13 words
The method of claim 1 wherein the said R''R''''C O compound is acetaldehyde.
Claim 2
Dependent Claim
13 words
The method of claim 1 wherein the said R''R''''C O compound is acrolein.
Claim 3
Dependent Claim
8 words
The method of claim 1 wherein the said
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein the said second reactant is
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein the said catalyst is a compound of molybdenum.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein the said catalyst is molybdenum acetyl acetonate.
Claim 7
Dependent Claim
12 words
The method of claim 1 wherein the said catalyst is a naphthenate.
Claim 8
Independent Claim
10 words
A method for the formation of compounds of the formula
Claim 9
Dependent Claim
15 words
The method of claim 9 wherein the said R''R''''C O compound is acetaldehyde and the
References Cited (Backward Citations)
US3475461A
Cited
US3475457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |