Patent US4052401A successfully refreshed from Google Patents.
US4052401A
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US
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Production of 3-(1',3'-dioxane)-propionaldehyde compounds
Assignee: Celanese Corp
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Filing: 1976-09-07
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Granted: 1977-10-04
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Expires: 1996-09-07
Abstract
Abstract This invention provides a process for producing 2-vinyl-1,3-dioxane compounds rapidly and efficiently by contact of a mixture of acrolein and a 1,3-propanediol compound with solid cation exchange resin in acid form. There is further provided a process for conversion of acrolein into 3-(1',3'-dioxane)propionaldehyde derivatives.
Inventors
- 👤 Oscar Richard Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:02
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/04; C07D319/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
106 words
A process for producing 3-(1',3'-dioxane)-propionaldehyde compounds which comprises (1) forming a liquid feed mixture of acrolein and a diol compound of the formula: ##STR3## wherein R is hydrogen or methyl; (2) passing the acrolein-diol feed mixture through a fixed bed of perfluoro sulfonic acid cation exchange resin in acid form, at a liquid hourly space velocity between about 0.1 and 50 and a reaction temperature in the range between about 10° C and 60° C, to yield an effluent mixture containing 2-vinyl-1,3-dioxane product; and (3) subjecting the effluent mixture to hydroformylation conditions to produce 3-(1'3'-dioxane)propionaldehyde corresponding to the formula: ##STR4## wherein R is hydrogen or methyl.
Claim 2
Dependent Claim
106 words
A process for producing 3-(1',3'-dioxane)-propionaldehyde compounds which comprises (1) forming a liquid feed mixture of acrolein and a diol compound of the formula: ##STR3## wherein R is hydrogen or methyl; (2) passing the acrolein-diol feed mixture through a fixed bed of perfluoro sulfonic acid cation exchange resin in acid form, at a liquid hourly space velocity between about 0.1 and 50 and a reaction temperature in the range between about 10° C and 60° C, to yield an effluent mixture containing 2-vinyl-1,3-dioxane product; and (3) subjecting the effluent mixture to hydroformylation conditions to produce 3-(1'3'-dioxane)propionaldehyde corresponding to the formula: ##STR4## wherein R is hydrogen or methyl.
Claim 3
Dependent Claim
21 words
A process in accordance with claim 1 wherein the effluent mixture is freed of acrolein before being subjected to hydroformylation conditions.
References Cited (Backward Citations)
DE2334378A1
Cited
US3929915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |