动物油食用级精炼

物理精炼是将毛油经脱胶、脱酸、脱色和脱臭等工序除去毛油中非甘油酯成

分工艺过程。其中，脱酸是油脂精炼重要工序之一，是除去毛油中游离脂肪酸，

并同时除去部分色素、磷脂、烃类和粘液质等杂质及如生育酚、甾醇、甾醇酯等

有益成分。物理脱酸是在高真空条件下，用蒸汽通入油脂让蒸汽携带除去酸价，

不皂化物、气味物质一种方法。与化学脱酸相比，该法无脚产生，因此油耗低

油品质量高，且操作简单，需要蒸汽水和动力少，需要**低，一些热敏性色

素(类胡萝卜素)和臭味物质也随蒸汽汽提除去。同碱炼脱酸相比，物理脱酸具有

产量大、无皂脚产生、及溢流物量降低、减少污染环境等优点

Physical refining is the process of removing non-glyceride ester componenls in crude oil through

degumming, deacidification, decolorization and deodorization. Among them, deacidification is one of the

important processes of oil refining, which is to remove free fatty acids in crude oll, and at the same time

remove some pigments, phospholipids, hydrocarbons and mucilage and other impurities and beneficial

components such as tocopherols, sterols, slerol esters and other benelicial components. Physical

deacidification is a method of using steam to pass grease into the oil under high vacuum conditions to

remove acid value, unsaponifiable substances and odor substances. Compared with chemical

deacidification, this method has no soap feet, so the fuel consumption is low, the oil quality is high, and the

operation is simple, the need for steam water and power is less, the need for low investment, some heal-

sensitive pigments (carotenoids) and odorous substances are also removed with steam stripping.

Compared with alkall refining and deacidificalion, physical deacidification has the advantages of large

outout, no soap foot production, reduced overflow volume, and reduced anvironmenta pollution.