Shijing, the Book of Odes, contains several poems mentioning soybeans. [ 4] To produce soybean oil, the soybeans are cracked, adjusted for moisture content, heated to between 60 and 88 °C (140 and 190 °F), rolled into flakes, and solvent-extracted with hexanes. The oil is then refined, blended for different applications, and sometimes hydrogenated.
What are the key steps in the refining process?
One of the key steps in the refining process is the elimination of impurities from crude vegetable oils especially the phosphatides or so-called gums (see chapter Degumming – Introduction for their structural formulae). They are mainly present in oils extracted with solvent from soya beans, sunflower seed and rapeseed.
How is crude oil extracted from palm fruit?
The crude oil is clarified by centrifugation, washed with hot water, followed by drying. All these processes provide a yellow-red crude oil product due to the high carotene content. This crude oil is refined, where the free fatty acids are removed and the color is destroyed. Table 4.3 shows the palm fruit characteristics and oil composition.
Which oil is used in cooking?
Effects of the cooking process on the quality of vegetable edible oils Sunflower oil, soybean oil, palm oil, rapeseed oil and peanut oil are commonly used in cooking . During cooking, oil is added to food to give it taste, colour and fragrance.
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