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Title:
METHOD OF SEPARATING GLYCOLS
Document Type and Number:
Japanese Patent JPS5520749
Kind Code:
A
Abstract:

PURPOSE: A mixture of aliphatic glycols and nonglycols that boil at temperatures near the boiling points of glycol is subjected to liquid-liquid extraction with a specific polar solvent and nonpolar solvent, thus separating title compounds, a starting material of synthetic resins, inexpensively and efficiently.

CONSTITUTION: Aliphatic glycols of 5W19 carbon atoms and nonglycols boiling at temperatures near the boiling points of glycols are separated from each other by liquid-liquid extraction using a polar solvent and a nonpolar solvent as hexane or heptane wherein a mixture of over 65wt% of methanol and less than 35wt% of water is used as the polar solvent. The ratio of the extraction solvent (polar solvent + nonpolar solvent) to the mixture to be extracted is about over 1(ml/g), preferably over 3. The temperature is 20W40°C.

USE: Lubricant, coating, adhesive, raw material of perfumes.


Inventors:
SHIBATANI HARUO
NAKASHIMA MASATO
Application Number:
JP9439478A
Publication Date:
February 14, 1980
Filing Date:
August 02, 1978
Export Citation:
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Assignee:
MITSUBISHI PETROCHEMICAL CO
International Classes:
C07C29/86; C07C27/00; C07C31/20; C07C67/00; (IPC1-7): C07C29/86; C07C31/20