Azeotropic purification of Z-11-hexadecenal

Distillation: processes – separatory – Adding material to distilland except water or steam per se – Organic compound

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203 64, 203 80, 568490, 568492, B01D 336, C07C 4721

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active

045591113

ABSTRACT:
Production of essentially pure Z-11-hexadecenal by azeotropic distillation is described. Contacting a mixture of Z-11-hexadecenal, hexadecene and hexadecadiene with dimethylsulfoxide and subjecting the blend to azeotropic distillation allows for the removal of hydrocarbon impurities from the aldehyde. Contacting a mixture of Z-11-hexadecenal and hexadecenol with a C.sub.2 -C.sub.4 glycol and subjecting the blend to azeotropic distillation conditions allows for the recovery of a glycol-aldehyde azeotrope from which essentially pure aldehyde is readily recovered. A mixture comprising Z-11-hexadecenal, hexadecene, hexadecadiene and hexadecenol can be sequentially treated according to the above-described azeotropic distillation steps in order to provide essentially pure Z-11-hexadecenal.

REFERENCES:
patent: 2580750 (1952-01-01), Fleming
patent: 3220932 (1965-11-01), Crandall
patent: 3894916 (1975-07-01), Fischer et al.
patent: 3960932 (1976-01-01), Heck
patent: 4170601 (1979-10-01), Leadbetter
patent: 4335263 (1982-06-01), Minai
patent: 4480139 (1984-10-01), Scott et al.

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