Experimental study of zanthoxylum seed oil refining process

The objective of the study is to make crude zanthoxylum seed oil that contains much free fatty acid and wax. In the study the acid contained in the oil was eliminated through solvent extraction and common alkali?refining, then the oil was decolorized with activated carbon. Experiment result showed that the oil output was 73.84%, the acid value of the oil (kOH as reference) was lower than 0.5 mg/g, which reached the national standard for the first grade cooking oil, the α-LNA contained was totally reserved, the weight of ecycled free fatty acid and wax was 19.19% of zanthoxylum seed, the?ratio?of oil acid values was 0.74, and the recycling rate of ethanol was 91.15%. The improved refining process of zanthoxylum seed oil is to extract crude oil with 95% ethanol twice according to the proportion of 2.5:1(V/W) firstly, and then deacidify the oil through alkali?refining, finally?decolorize the oil with activated carbon.