油脂制备过程对油脂色泽的影响及应对措施

油脂中的呈色物质包括天然色素和加工色素。天然色素易脱除,而加工色素难脱除。讨论了在油料的预处理、油脂浸出、混合油净化、混合油蒸发等油脂制备过程中,产生或残留的非水化磷脂、蛋白质、糖类等杂质,受热氧化或相互结合产生加工色素,导致油脂色泽加深。采用Alcon工艺、挤压膨化工艺,且加强对混合油的净化处理,可减少非水化磷脂的转化量及蛋白质、糖类等物质的含量,采用负压蒸发工艺可降低混合油蒸发的温度,从而减少加工色素的产生,改善油脂的色泽。

Influence of oil extraction process on oil color and countermeasures

There are natural colors and factitious colors in oils.Natural colors are easily to be removed.But factitious colors are not.The influence of oil extraction process(such as pre-treatment of oilseed,oil extraction,the purification of miscella,the vaporization of miscella) on oil color were discussed.The countermeasures on reducing factitious color were put forward by reducing non-hydratable phosphatide,protein,carbohydrate and so on with Alcon technology,extruding and expanding technology and filtering.