| This paper studied the extraction technology of hemp seed oil using low temperature hydraulic pressing method. Firstly, to screen the raw materials of hemp seed, and then the effect of time, temperature, pressure and material mass on the oil yield of hemp seed was studied through a single-factor experiment. The optimal technological parameters of cold pressed hemp seed oil were investigated by orthogonal experiments, and the quality of the hemp seed oil was evaluated. The results showed that the oil content of the shelled Bama hemp seed produced in Guangxi was as high as 56.53%, and the hydraulic press had the highest oil yield, and the quality of the pressed oil was the best. The optimal process for hydraulic pressing of hemp seed oil is as follows: material mass of 500 g, pressure of 50 MPa, temperature of 70℃. Under optimal conditions, the oil yield of hemp seed oil was 44.01%. Meanwhile, hemp seed oil was rich in unsaturated fatty acids, its sensory analysis and physicochemical properties were attained the edible vegetable oil standard. |
