Separation of diastereomers by extractive distillation

Details Separation of diastereomers by extractive distillation Separation of diastereomers by extractive distillation

1987-04-16

1989-10-17

Bascomb, Wilbur

Distillation: processes, separatory

With measuring, testing or inspecting

203 3, 203 57, 203 58, 203 59, 203 60, 203 62, 203 63, 203 64, 203 65, 203 91, 560 57, 560124, 562402, 562866, 562856, 568829, B01D 340, C07B 5700

Patent

active

048744735

ABSTRACT:
Diastereomers can be separated with good industrial success with the aid of extractive distillation. The separation process is characterized in that an auxiliary which changes the partial pressure of the various diastereomers to be separated to a different degree and thus allows easier separation of the diastereomers by distillation is added during the distillation. Using the present process diastereomic cis/trans-permetric acid methyl esters and mixtures of menthol and isomenthol can be separated with isolation of 99% pure product.

REFERENCES:
patent: 3491152 (1970-01-01), Howard et al.
patent: 3847755 (1974-11-01), Chanel et al.
patent: 4134919 (1979-01-01), Yamanaka et al.
patent: 4196304 (1980-04-01), Naumann
patent: 4306077 (1981-12-01), Leigh
patent: 4488937 (1984-12-01), Berg et al.
patent: 4599444 (1986-07-01), Foggassy et al.

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