Process for preparing aldehydes by hydroformylation
AssigneeCelanese Corporation
InventorsSandra Bogdanovic, Helmut Bahrmann, Carl-Dieter Frohning, Ernst Wiebus
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Abstract
The invention concerns a process for preparing aldehydes by reacting with hydrogen and carbon monoxide at a temperature of between 20 and 170° C. and a pressure of between 1 and 300 bar an olefinically unsaturated C3-C5 compound in the presence of an aqueous phase containing rhodium and sulphonated triarylphosphines as catalyst and between 1 and 35 wt % of a compound of formula (1), R(OCH2CH2)nOR1, R standing for hydrogen, a straight-chain or branched C1-C4 alkyl group or a C1-C4 hydroxyalkyl group, R1 standing for hydrogen or a methyl group, and n standing for an integer from 3 to 50.
Claims37
A process for preparing aldehydes, which comprises reacting an olefinically unsaturated compound having 3 carbon atoms with hydrogen and carbon monoxide at from 20 to 170° C. and from 1 to 300 bar in the presence of an aqueous phase comprising rhodium and sulfonated triarylphosphines as catalyst and from 1 to 15% by weight of a compound of the formula (1) R(OCH2CH2)nOR1, where the triarylphosphines contain at least three —(SO3)M radicals in which M are identical or different and M is H, an alkali metal ion, an ammonium ion, a quaternary ammonium ion, a ½ alkaline earth metal ion or ½ zinc ion, and where, in the formula (1), R is hydrogen, a straight-chain or branched alkyl radical having from 1 to 4 carbon atoms or a hydroxyalkyl radical having from 1 to 4 carbon atoms, R1 is hydrogen or a methyl radical and n is an integer from 3 to 50.
A process for preparing aldehydes, which comprises reacting an olefinically unsaturated compound having 4 carbon atoms with hydrogen and carbon monoxide at from 20 to 170° C. and from 1 to 300 bar in the presence of an aqueous phase comprising rhodium and sulfonated triarylphosphines as catalyst and from 8 to 20% by weight of a compound of the formula (1) R(OCH2CH2)nOR1, where the triarylphosphines contain at least three —(SO3)M radicals in which M are identical or different and M is H, an alkali metal ion, an ammonium ion, a quaternary ammonium ion, a ½ alkaline earth metal ion or ½ zinc ion, and where, in the formula (1), R is hydrogen, a straight-chain or branched alkyl radical having from 1 to 4 carbon atoms or a hydroxyalkyl radical having from 1 to 4 carbon atoms, R1 is hydrogen or a methyl radical and n is an integer from 3 to 50.
A process for preparing aldehydes, which comprises reacting an olefinically unsaturated compound having 5 carbon atoms with hydrogen and carbon monoxide at from 20 to 170° C. and from 1 to 300 bar in the presence of an aqueous phase comprising rhodium and sulfonated triarylphosphines as catalyst and from 8 to 30% by weight of a compound of the formula (1) R(OCH2CH2)nOR1, where the triarylphosphines contain at least three —(SO3)M radicals in which M are identical or different and M is H, an alkali metal ion, an ammonium ion, a quaternary ammonium ion, a ½ alkaline earth metal ion or ½ zinc ion, and where, in the formula (1), R is hydrogen, a straight-chain or branched alkyl radical having from 1 to 4 carbon atoms or a hydroxyalkyl radical having from 1 to 4 carbon atoms, R1 is hydrogen or a methyl radical and n is an integer from 3 to 50.
Dependencies are inferred from the claim text.