A: what is chemical refining?Chemical refining of edible oil is the traditional method used in past centuries. The main purpose of chemical refining is to remove the FFA by an alkaline solution and at the same time remove other impurities.

A: Decolorization process of edible oil refining technology usually uses the adsorption decolorization method. White clay absorbs pigment and other substance to improve the color and quality of edible oil.

A: Physical refining of edible oil is also called steam distillation deacidification.Physical refining of edible oil is particularly suitable for low-gum tropical oil seeds, such as palm and coconut, etc, and for refining animal fats.

A: RBD palm oil and RBD palm olein belong to different products of palm oil.RBD palm oil is the products of palm oil refinery plant. And RBD palm olein is obtained after further processing RBD palm oil in palm oil fractionation plant.

A: Refined edible oil is obtained through further processed by series of machines in edible oil refinery plant.Usually edible oil refining process includes degumming, deacidifaction, decolorization and deodorization four steps.

A: Crude vegetable oil usually contains pigment,which leads to crude vegetable oil color too dark,do not meet the standard.Thus,in vegetable oil refining process,it has one step to removethe pigments in the crude vegetable,which we also called bleaching.

A: There are two ways to remove the gum in crude vegetable oil in vegetable oil refining process. One is hydration degumming way, the other is dry degumming way. These two ways are suitable for different crude vegetable oil.

A: The wax content of crude sunflower oil is about 0.06-0.1%, whose exist will have bad effect on sunflower oil taste and transparency. Especially when cooking, high wax content sunflower oil produces smoke and strong smell.