EP0003753A1
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EP
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Process of hydroformylating cyclic acrolein acetals
Assignee: EIDP Inc
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Filing: 1979-01-29
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Granted: —
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Expires: 1999-01-29
Abstract
Abstract A process for hydroformylating a cyclic acrolein acetal to form the corresponding cyclic acrolein acetal aldehyde, said process comprising conducting said hydroformylation in the presence of carbon monoxide, hydrogen, rhodium complex catalyst and 1-3%of excess triphenyl phosphite ligand based on the acetal at a pressure of carbon monoxide of from 5-20 psia and a pressure of hydrogen of from 10- 400 psia maintained with a gas having a H 2 :CO ratio of from 1:1-20:1 and a temperature of from 100-115°C, the rhodium content of said catalyst being 1-50 ppm of rhodium based on the acetal.
Inventors
- 👤 Charles Carmen Cumbo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 19:35
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/14; C07D317/26; C07D319/00; C07D319/04; C07D319/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
115 words
The process of hydroformylating cyclic acrolein acetals of the general formulae or where R 1 and R 2 are selected from the group consisting of H and the same or different alkyl groups of 1-4 carbon atoms to the corresponding aldehydes in the presence of hydrogen, carbon monoxide, rhodium complex catalyst and organo-phosphorus ligand, characterized by the presence of 1-50 ppm of rhodium in the complex catalyst based on the cyclic acrolein acetal, a ratio of H 2 :CO of from 1:1-20:1, at 1-3% by weight based on the cyclic acrolein acetal of excess triphenyl phosphite ligand, a pressure such that the CO partial pressure is from 5-20 psia and a temperature of from 100-115°C.
Claim 2
Dependent Claim
115 words
The process of hydroformylating cyclic acrolein acetals of the general formulae or where R 1 and R 2 are selected from the group consisting of H and the same or different alkyl groups of 1-4 carbon atoms to the corresponding aldehydes in the presence of hydrogen, carbon monoxide, rhodium complex catalyst and organo-phosphorus ligand, characterized by the presence of 1-50 ppm of rhodium in the complex catalyst based on the cyclic acrolein acetal, a ratio of H 2 :CO of from 1:1-20:1, at 1-3% by weight based on the cyclic acrolein acetal of excess triphenyl phosphite ligand, a pressure such that the CO partial pressure is from 5-20 psia and a temperature of from 100-115°C.
Claim 3
Dependent Claim
11 words
The process of Claim 1 wherein the temperature is from 105-110°C.
Claim 4
Dependent Claim
23 words
The process of Claim 1 wherein the rhodium concentration is from 1-10 ppm and the ratio of H 2 :CO is from 2:1-20:1.
Claim 5
Dependent Claim
12 words
The process of Claim 1 wherein the cyclic acrolein acetal is 2-vinyl-4-methyl-l,3-dioxane.
Claim 6
Dependent Claim
11 words
The process of Claim 4 wherein the temperature is from 105-110°C.
Claim 7
Dependent Claim
23 words
The process of Claim 4 wherein the rhodium concentration is from 1-10 ppm and the ratio of H 2 :CO is from 2:1-20:1.
Claim 8
Dependent Claim
12 words
The process of Claim 1 wherein the cyclic acrolein acetal is 2-vinyl-5-methyl-l,3-dioxane.
Claim 9
Dependent Claim
11 words
The process of Claim 7 wherein the temperature is from 105-110°C.
Claim 10
Dependent Claim
23 words
The process of Claim 7 wherein the rhodium concentration is from 1-10 ppm and the ratio of H 2 :CO is from 2:1-20:1.
References Cited (Backward Citations)
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