Abstract
Camellia oil is a kind of natural product with high added value. In the process of production, processing, and transportation, acidic substances and peroxides that reduce the quality of oil are produced. In this paper, it was refined by scraping membrane molecular distillation device. The factors affecting the molecular distillation results were analyzed and studied through a single factor experiment and orthogonal experiment. On the surface of the experiment, the optimal process parameters were as follows: the temperature was 190℃, the pressure was 1 Pa, the scraping speed was 300r/min, and the feed amount was 900g/h. Under this condition, the acid value in camellia oil decreased from 2.67mgKOH/g to 0.19mgKOH/g, and the free fatty acid removal rate was 92.88%. The peroxide value decreased from 16.78mmol/kg to 1.03mmol/kg, and the peroxide removal rate was 93.86%. The experimental results showed that the surface of the scraping membrane molecular distillation equipment could meet the national standard of acid value and peroxide value under the appropriate technological parameters, and there was no solvent residue, which was a safe physical purification process.
Highlights
Scraping film molecular distillation is used to separate materials according to the difference of molecular activity coefficient of different components under the nonequilibrium state of mixture under high vacuum conditions
Relying on the theory of molecular thermal motion, the molecular thermal motion of different free paths is intensified under this condition, so that the light molecules escape from the liquid surface of the raw material and condense on the condensation surface, completing the separation process of light and light components[1,2,3]
To improve the quality of camellia oil, make full use of the resources of camellia oil, based on experiment and purifying of camellia oil, this paper discusses using the blown film type of molecular distillation technology of camellia oil purity to increase at the same time reduce generated during the production of free fatty acid content, with the most gentle way to reduce the damage to the original oil natural ingredients
Summary
Scraping film molecular distillation is used to separate materials according to the difference of molecular activity coefficient of different components under the nonequilibrium state of mixture under high vacuum conditions. As a precious oil with high added value, camellia oil has high medicinal and edible value. To improve the quality of camellia oil, make full use of the resources of camellia oil, based on experiment and purifying of camellia oil, this paper discusses using the blown film type of molecular distillation technology of camellia oil purity to increase at the same time reduce generated during the production of free fatty acid content, with the most gentle way to reduce the damage to the original oil natural ingredients
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