钠基膨润土对富含酚酸菜籽油的吸附脱磷效果及品质的影响

以微波-压榨富含酚酸菜籽油为研究对象,考察了钠基膨润土的吸附脱磷效果以及处理过程中菜籽油酚酸和其他品质的变化.首先考察了吸附温度、钠基膨润土添加量和吸附时间对脱磷率和菜籽油中酚酸的影响,然后通过正交实验,以脱磷率、总酚保留率和canolol(2,6-二甲氧基-4-2烯基苯酚)保留率的综合加权得分为考察指标,得出钠基膨润...

Effects of sodium bentonite on adsorption dephosphorization and its influence on the quality of rapeseed oil rich in phenolic acid

In this paper, with rapeseed oil rich in phenolic acid pressed from microwave pretreatment as research object, the effect of adsorption dephosphorization, the changes of phenolic acids and quality of rapeseed oil during dephosphorization by sodium bentonite were investigated. Firstly, adsorption temperature, adding amount of sodium bentonite and adsorption time on dephosphorization rate and phenolic acids in rapeseed oil were investigated. Then, with dephosphorization rate, total phenol and canolol retention rate as evaluation index, the optimal dephosphorization parameters of sodium bentonite were obtained by orthogonal experiment as follows: adsorption temperature of 40oC, sodium bentonite addimg amount of 0.75% and adsorption time of 30min. Under this condition, the dephosphorization rate was 82.5%, total phenol and canolol retention rate were 97.2% and 93.2%, respectively. At the same time, sodium bentonite adsorption dephosphorization had no significant effect on fatty acid composition of rapeseed oil. It could also retain tocopherol and phytosterol well in rapeseed oil, the retention rates of total tocopherol and phytosterol were 98.2% and 94.2%, respectively.