Recovery of high-boiling aldehydes from rhodium-catalyzed hydroformylation processes
First Claim
1. Process for the recovery of an aldehyde product from a hydroformylation product solution comprising (i) a high-boiling aldehyde, (ii) hydroformylation catalyst components comprising rhodium and an organophosphine compound, and (iii) a hydroformylation solvent selected from the group consisting of alkanes having about 5 to 20 carbon atoms, benzene, toluene, xylene isomers, tetrahydronaphthalene, decahydronaphthalene and dialkyl benzenedicarboxylate esters, by the steps of:
- (1) intimately contacting the hydroformylation product solution with an extraction solution comprising a primary alkanol and water to form a 2-phase mixture; and
(2) separating the mixture of step (1) to obtain;
(a) a hydroformylation solvent phase containing catalyst components; and
(b) an alkanol/water phase containing the high-boiling aldehyde.
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Abstract
Disclosed is an extraction process for the recovery of high-boiling aldehydes produced by the rhodium-catalyzed hydroformylation of olefins in the presence of a hydroformylation solvent. The extraction process involves intimately contacting a hydroformylation product solution comprising (i) a high-boiling aldehyde, (ii) hydroformylation catalyst components comprising rhodium and an organophosphine compound, and (iii) a hydroformylation solvent with an extraction solution comprising a primary alkanol and water to form a 2-phase mixture. The phases are separated to obtain a hydroformylation solvent phase containing catalyst components and an alkanol/water phase containing the high-boiling aldehyde.
38 Citations
23 Claims
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1. Process for the recovery of an aldehyde product from a hydroformylation product solution comprising (i) a high-boiling aldehyde, (ii) hydroformylation catalyst components comprising rhodium and an organophosphine compound, and (iii) a hydroformylation solvent selected from the group consisting of alkanes having about 5 to 20 carbon atoms, benzene, toluene, xylene isomers, tetrahydronaphthalene, decahydronaphthalene and dialkyl benzenedicarboxylate esters, by the steps of:
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(1) intimately contacting the hydroformylation product solution with an extraction solution comprising a primary alkanol and water to form a 2-phase mixture; and (2) separating the mixture of step (1) to obtain;
(a) a hydroformylation solvent phase containing catalyst components; and
(b) an alkanol/water phase containing the high-boiling aldehyde. - View Dependent Claims (2)
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3. Process for the recovery of an aldehyde product from a hydroformylation product solution comprising (i) an aldehyde having a boiling point of at least 125°
- C., (ii) hydroformylation catalyst components comprising rhodium and an organophosphine compound, and (iii) a hydroformylation solvent selected from alkanes having about 5 to 20 carbon atoms, alkyl-substituted benzenes having about 9 to 15 carbon atoms, tetrahydronaphthalene, and decahydronaphthalene comprising the steps of;
(1) intimately contacting the hydroformylation product solution with an extraction solution comprising methanol and water at a temperature of about 20 to 60°
C. to form a 2 phase mixture; and(2) separating the mixture of step (1) to obtain; (a) a hydroformylation solvent phase containing catalyst components; and (b) a methanol/water phase containing the aldehyde; wherein the volume ratio of methanol to water of the extraction solution is about 5;
1 to 1;
1 and the difference between the densities of the hydroformylation product solution and the extraction solution is at least 0.05 g/mL. - View Dependent Claims (4, 5, 6, 7, 8)
- C., (ii) hydroformylation catalyst components comprising rhodium and an organophosphine compound, and (iii) a hydroformylation solvent selected from alkanes having about 5 to 20 carbon atoms, alkyl-substituted benzenes having about 9 to 15 carbon atoms, tetrahydronaphthalene, and decahydronaphthalene comprising the steps of;
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9. Process for the recovery of an aldehyde product from a hydroformylation product solution comprising (i) a high-boiling aldehyde, (ii) hydroformylation catalyst components comprising rhodium and an organophosphine compound, and (iii) a hydroformylation solvent selected form the group consisting of alkanes having about 5 to 20 carbon atoms, benzene, toluene, xylene isomers, alkyl-substituted benzenes having about 9 to 15 carbon atoms, tetrahydronaphthalene, decahydronaphthalene and dialkyl benzenedicarboxylate esters, by the steps of:
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(1) intimately contacting the hydroformylation product solution with an extraction solution comprising a primary alkanol, water and a salt of a carboxylic acid to form a 2-phase mixture; and (2) separating the mixture of step (1) to obtain; (a) a hydroformylation solvent phase containing catalyst components; and (b) an alkanol/water phase containing the high-boiling aldehyde. - View Dependent Claims (10)
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11. Process for the recovery of an aldehyde product from a hydroformylation product solution comprising (i) an aldehyde having a boiling point of at least 125°
- C., (ii) hydroformylation catalyst components comprising rhodium and an organophosphine compound, and (iii) a hydroformylation solvent selected from alkanes having about 5 to 20 carbon atoms, alkyl-substituted benzenes having about 9 to 15 carbon atoms, tetrahydronaphthalene, and decahydronaphthalene comprising the steps of;
(1) intimately contacting the hydroformylation product solution with an extraction solution comprising methanol, water and 1 to 5000 ppm of an alkali metal salt of a carboxylic acid having 4 to 30 carbon atoms at a temperature of about 20°
to 60°
C. to form a 2-phase mixture; and(2) separating the mixture of step (1) to obtain; (a) a hydroformylation solvent phase containing catalyst components; and (b) an methanol/water phase containing the aldehyde;
wherein the volume ratio of methanol to water of the extraction solution is about 5;
1 to 1;
1 and the difference between the densities of the hydroformylation product solution and the extraction solution is at least 0.05 g/mL. - View Dependent Claims (12, 13, 14, 15)
- C., (ii) hydroformylation catalyst components comprising rhodium and an organophosphine compound, and (iii) a hydroformylation solvent selected from alkanes having about 5 to 20 carbon atoms, alkyl-substituted benzenes having about 9 to 15 carbon atoms, tetrahydronaphthalene, and decahydronaphthalene comprising the steps of;
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16. Process for the recovery of an aldehyde product from a hydroformylation product solution comprising (i) a high-boiling aldehyde, (ii) hydroformylation catalyst components comprising rhodium and an organophosphine compound, and (iii) a hydroformylation solvent selected from the group consisting of alkanes having about 5 to 20 carbon atoms, benzene, toluene, xylene isomers, alkyl-substituted benzenes having about 9 to 15 carbon atoms, tetrahydronaphthalene, decahydronaphthalene and dialkyl benzenedicarboxylate esters, by the steps of:
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(1) intimately contacting the hydroformylation product solution with an extraction solution comprising a primary alkanol and water to form a 2-phase mixture; (2) separating the mixture of step (1) to obtain; (a) a hydroformylation solvent phase containing catalyst components; and (b) an alkanol/water phase containing the high-boiling aldehyde; (3) intimately contacting the alkanol/water phase of step (2) with an organic solvent selected from hydroformylation solvent, olefin feedstock or a mixture thereof; and (4) separating the mixture of step (3) to obtain; (a) an organic solvent phase containing catalyst components present in the alkanol/water phase of step (3); and (b) an alkanol/water phase containing the high-boiling aldehyde. - View Dependent Claims (17, 18)
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19. Process for the recovery of an aldehyde product from a hydroformylation product solution comprising (i) a high-boiling aldehyde, (ii) hydroformylation catalyst components comprising rhodium and an organophosphine compound, and (iii) a hydroformylation solvent selected from the group consisting of alkanes having about 5 to 20 carbon atoms, benzene, toluene, xylene isomers, alkyl-substituted benzenes having about 9 to 15 carbon atoms, tetrahydronaphthalene, decahydronaphthalene and dialkyl benzenedicarboxylate esters, and the conversion of the aldehyde to the corresponding alcohol comprising the steps of:
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(1) intimately contacting the hydroformylation product solution with an extraction solution comprising a primary alkanol and water to form a 2-phase mixture; and (2) separating the mixture of step (1) to obtain; a hydroformylation solvent phase containing catalyst components; and (b) an alkanol/water phase containing the high-boiling aldehyde; (3) subjecting the alkanol/water phase containing the high boiling aldehyde to catalytic hydrogenation to convert the aldehyde to the corresponding alcohol. - View Dependent Claims (20, 21, 22, 23)
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Specification