Using organic solvent extraction method to extract oil is generally method in oil processing industry. Usually adopting organic solvent mainly includes No.2 solvent (n-hexane) and # solvent (butane and propane).
Adopt the method of solvent extraction to extract the walnut oil. Also somebody has carried on the research in this field. In the condition of the temperature 29 ℃, time 89, the solvent ratio 4: 289, walnut oil extraction yield is 9 < 893 (oil= kernel).
By using organic solvent extraction method, oil yield rate is high and technological process can realize highly continuous and automatic control. But there exists inflammable and explosive danger and residual solvent in oil and meal is bad for the health. So people are trying to adopt new technology to extract the walnut oil.
