Technology and equipment advantages:
　　After pretreatment and subcritical low temperature leaching,the residual oil was below 1.5%and the oil yield was higher.After low temperature extraction of oil,the starch is basically invariant,which is a good food raw material.
　　The first is the cleaning and cleaning of raw materials.There will be a lot of mud,stones and impurities in the harvest of Yusha bean.These impurities should be removed in advance,otherwise it will affect the service life of the equipment,the quality of the oil and the utilization of the meal.What use commonly at present is to clear,clean,the method such as drying.The cleaned material enters the pretreatment workshop and enters the extraction workshop after screening,crushing,softening and compacting.
　　Process parameters of subcritical extraction of soybean oil:
　　Thickness of blank:0.3-0.4mm
　　Moisture of blank:<8%
　　Butane solvent extraction times:4 times
　　Extraction pressure:0.35-0.4MPa
　　Extraction temperature:25-35℃
　　Material to solution ratio:1:1.2
　　Residual oil of meal:<1.5%