Process for the separation, by countercurrentwise liquid-liquid extraction, of a glyoxal diacetal from a crude mixture comprising it
First Claim
1. Process for the separation of a glyoxal diacetal of formula (I) in which R represents a linear or branched C1-C4 alkyl group, from a crude mixture comprising said glyoxal diacetal and a glyoxal monoacetal of formula (II) in which R is as defined above, characterized in that at least one step of countercurrentwise liquid-liquid extraction of said glyoxal diacetal is carried out using a solvent which is immiscible with the reaction medium, in order to obtain, on the one hand, a light phase comprising said glyoxal diacetal and, on the other hand, a heavy phase including the other constituents of the crude mixture.
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Abstract
The invention relates to a method for separating a diacetal of the glyoxal of a raw mixture comprising said diacetal of the glyoxal and a monoacetal of the glyoxal, by means of counter-current liquid-liquid extraction.
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Citations
26 Claims
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1. Process for the separation of a glyoxal diacetal of formula (I)
in which R represents a linear or branched C1-C4 alkyl group, from a crude mixture comprising said glyoxal diacetal and a glyoxal monoacetal of formula (II) in which R is as defined above, characterized in that at least one step of countercurrentwise liquid-liquid extraction of said glyoxal diacetal is carried out using a solvent which is immiscible with the reaction medium, in order to obtain, on the one hand, a light phase comprising said glyoxal diacetal and, on the other hand, a heavy phase including the other constituents of the crude mixture.
Specification