Method for producing a dimerized aldehyde
AssigneeMitsubishi Chemical Corporation
InventorsTomoyuki Mori, Kouichi Fujita, Yuuji Kajita, Masaki Takai
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Abstract
A method for producing a dimerized aldehyde, which comprises subjecting a feed aldehyde to a condensation reaction and a dehydration reaction in the presence of a basic catalyst, wherein the feed aldehyde is the one having one or two hydrogen atoms at the .alpha.-position, an organic feed stream containing the feed aldehyde is supplied to a reactive distillation column, and the condensation reaction and the dehydration reaction are carried out simultaneously in the reactive distillation column.
Claims29
A method for producing a dimerized aldehyde, which comprises subjecting a feed aldehyde to a condensation reaction and a dehydration reaction in the presence of a basic catalyst, wherein the feed aldehyde is the one having one or two hydrogen atoms at the .alpha.-position, an organic feed stream containing the feed aldehyde is supplied to a reactive distillation column, and the condensation reaction and the dehydration reaction are carried out simultaneously in the reactive distillation column.
A method for producing a dimerized aldehyde, which comprises subjecting a feed aldehyde to a condensation reaction and a dehydration reaction in the presence of a basic catalyst, wherein an organic feed stream containing the feed aldehyde is supplied to a reactor, and the condensation reaction and the dehydration reaction are carried out simultaneously in the reactor, wherein contact of the feed aldehyde with the basic catalyst in the reactor is carried out in such a manner that the feed aldehyde in a gas-liquid mixed state is intimately contacted with the basic catalyst liquid in a liquid state.
A method for producing a dimerized aldehyde, wherein a distillation column is used which has a feed inlet at an intermediate section of the column and which is provided with liquid phase-maintaining means located in the column above and below the feed inlet, wherein an alkali catalyst is present on the liquid phase-maintaining means located below the feed inlet, a feed aldehyde containing an aldehyde having two hydrogen atoms at the .alpha.-position, is supplied from the feed inlet, a condensation reaction and a dehydration reaction of the feed aldehyde are carried out in the column to form a dimerized aldehyde having an unsaturated bond, a low boiling point fraction containing the feed aldehyde and water is distilled from above the feed inlet of the distillation column, while a formed mixture containing the dimerized aldehyde is withdrawn from below the feed inlet of the distillation column, and the dimerized aldehyde is recovered from the formed mixture.
Dependencies are inferred from the claim text.