医用油茶籽油的脱酸脱色新工艺研究

New technology of deacidification and bleaching of medical oil-tea camellia seed oil

以茶壳为原料制备氮掺杂活性炭,采用大孔树脂与氮掺杂茶壳活性炭联合使用的双重吸附工艺对油茶籽油同时进行脱酸脱色。对氮掺杂茶壳活性炭的制备条件进行了优化,并对所得油茶籽油的质量指标进行测定。结果表明:氮掺杂茶壳活性炭的最佳制备条件为以茶壳活性炭为碳源,以咪唑为氮源,咪唑浓度0.3 mol/L,活化温度850℃,活化时间60 min。在最佳工艺条件下,氮掺杂茶壳活性炭的比表面积为2 876 m^2/g,总孔容为1.55 cm^3/g,其中微孔孔容0.65 cm^3/g,中孔孔容0.55 cm^3/g,大孔孔容0.35 cm^3/g。所得油茶籽油无色透明,酸价(KOH)为0.14 mg/g,过氧化值为0.50 mmol/kg,达到了医用注射用油茶籽油的质量标准。

The nitrogen-doped activated carbon was prepared from tea shell.The deacidification and bleaching of oil-tea camellia seed oil was carried out simultaneously by the adsorption process of macroporous resin and nitrogen-doped tea shell activated carbon. The preparation conditions of nitrogen-doped tea shell activated carbon were optimized and the quality indexes of oil-tea camellia seed oil were determined. The results showed that the optimal preparation conditions of nitrogen-doped tea shell activated carbon were obtained as follows: tea shell activated carbon as carbon source, imidazole as nitrogen source, imidazole concentration 0.3 mol/L, activation temperature 850℃, activation time 60 min. Under the optimal conditions, the specific surface area of nitrogen-doped tea shell activated carbon was 2 876 m^2/g and the total pore volume was 1.55 cm^3/g, in which the micropore volume, the middle pore volume and the large pore volume were 0.65, 0.55, 0.35 cm^3/g, respectively. The oil-tea camellia seed oil obtained was colorless and transparent, with acid value 0.14 mgKOH/g, peroxide value 0.50 mmol/kg, which met the quality standard of oil-tea camellia seed oil for medical injection.