Method of extracting natural fenchol with high purity from a fenchol-containing by-product of turpentine

• Main Authors: ZHOU LIZHU, LI GUIZHEN, CHEN JIANQUAN, HUANG YUPING, MENG ZHONGLEI, QIN RONGXIU, LIANG ZHONGYUN, LI JUNJI, CEN CHAOFENG, CHEN HAIYAN
• Format: Patent
• Language: English
• Published: 03.02.2016
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The invention discloses a method of extracting natural fenchol with high purity from a fenchol-containing by-product of turpentine. The fenchol-containing by-product mainly comprises a monoterpene alcohol mixture of linalool, the fenchol and the like, wherein the content of the fenchol is 50 to 60 percent. The method is characterized by comprising the steps of adding an acid catalyst p-toluenesulfonic acid into the fenchol-containing by-product of the turpentine to perform a catalytic reaction; washing an oil layer obtained by neutralization and standing with water, then performing rectification and freezing crystallization, finally performing centrifugal separation at low temperature to obtain a natural fenchol product of which the purity is greater than 96 percent. According to the acid catalyst p-toluenesulfonic acid, a selective catalysis is performed on the monoterpene alcohol mixture by utilizing the difference of functional group activity, isomerides of which the boiling point is similar to that of the fenchol are removed, so that the natural fenchol with high purity is obtained. By adopting the fenchol-containing by-product of the turpentine as a raw material, the source is extensive, the cost is low, energy conservation and environment protection are realized, and the method is suitable for large-scale production, has very good economic benefit and social benefit.