The invention relates to the technical field of
woody plant oil processing, and discloses a woody pure natural
idesia polycarpa edible oil squeezing and purifying method, which comprises the following steps: S1,
raw material characteristic analysis and
process design: setting the upper limit of process parameters based on the
idesia polycarpa raw material analysis result; s2, extracting
crude oil by an acidic infiltration
drying auxiliary
water extraction method; s3, physical refining and purification of the
crude oil: sequentially carrying out cold
precipitation and primary
filtration, composite adsorption refining, short-path molecular
distillation and low-temperature
crystallization winterization treatment on the
idesia polycarpa crude oil; and S4,
filling in an
inert gas environment. According to the method, acid infiltration
drying is adopted to assist
water extraction,
cell walls of idesia polycarpa fruits are effectively broken through acid environment pretreatment, the oil extraction rate is greatly increased at a mild temperature in combination with compound enzymolysis, the temperature in the process is controllable, and heat damage is avoided from the source; a low-temperature process and short-path molecular
distillation are guided through
raw material analysis, and a whole-course
thermal protection barrier is constructed; therefore, the
retention rate of extremely thermosensitive active ingredients is high.