Method for preparing cyclopentadecanolide from malania oleifera oil

Abstract

The application of the invention discloses a method for preparing cyclopentadecanolide from malania oleifera oil in the technical field of chemical synthesis. The method comprises the following steps: 1, carrying out molecular distillation; 2, performing saponification and filter wash; 3, recrystallizing: dissolving out to crystallize for three times, wherein for the first crystallization, ether is taken as a solvent, for the second crystallization, acetone is taken as a solvent, and for the third crystallization, petroleum ether is taken as a solvent, recrystallizing fatty acid for multiple times, and finally obtaining pure white acicular crystal nervonic acid; 4,carrying out ozonization and reduction; 5, performing esterification; and 6, carrying out cyclopolymerization to obtain cyclopentadecanolide. According to the invention, cyclopentadecanolide is prepared from nervonic acid of which the purity reaches up to above 95%, and ozonization, reduction and cyclopolymerization are carried out on the high-purity nervonic acid with high purity and less impurities, thereby being favorable for obtaining high-purity cyclopolymerization.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a method for preparing cyclopentadecanolide from garlic fruit oil. Background technique [0002] Garlic fruit, scientific name Malania oleifera et Lee, has another name called mountain tung fruit, monkey fruit, wild tung tree, Malania queen etc. Qingpiaceae, woody evergreen oil tree. The tree stem is straight, up to 20 meters, tree diameter up to 40 centimeters, long garden-shaped leaves, oblate fruit, growing in 500-1640 meters moist and fertile limestone mountain mixed forest. The urban and rural areas where tung oil is produced in southern my country can be planted as greening trees, landscape trees, and oil trees. The fruit is harvested in autumn and winter, and fried to make garlic fruit oil, which is edible and used as industrial oil. The dense stem quality is suitable for timber. [0003] The unsoap content of garlic fruit oil in garlic fruit oil is 4%; the ...

AI Technical Summary

Problems solved by technology

However, polyunsaturated fatty acids are not easy to be included by urea. Based on the above principles, unsaturated fatty acids (esters) can be separated from saturated fatty acids (esters), that is, when they are in garlic fruit oil, low-carbon fatty acids such as oleic acid can be removed by inclusion. , thereby separating nervonic acid, and then preparing cyclopentadecanolactone, the content of nervonic acid in the crude product nervonic acid extracted is only 65%, and there are many other impurities. If it is directly used to produce cyclopentadecanolactone, it will produce more By-products that affect the yield of the reaction

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