Common raw materials for extracting oil are soybeans, rapeseeds, cottonseeds, peanuts, sunflower seeds, sesame, rice bran, tea seeds, oil palm fruits and corn germs etc.
●Soybean
Soybean is a kind of quality high protein oil material. It contains 15.5%—22.7% oil and 30%—45% protein. Soybean has become the most important plant oil material. The major producing countries are America, Brazil, Argentina, China, and India.
●Peanut
Peanut is native to South America, is an important high oil content soft oil material. The rate of kernels in peanut hull is about 65%—75%. The rate of oil in kernels is 40%—51%. And the protein ratio is 25%—31%.
●Sesame
Sesame is one of the oldest edible oil materials. Its oil ratio is up to 45%—63%. It contains 43% oleic acid and 43% linoleic acid, has higher nutritive value. Affected by the natural antioxidants—sesame phenol, the sesame oil has stable chemical property.
●Palm Kernel
Palm Kernel contains fresh pulp (dry basis contains 45%—50% oil) and palm kernel (dry basis contains 48%—55%). Producing oil with palm kernel usually adopts twice-extraction way. First extract oil from the pericarp and then from the kernel. The oil is edible after refining.
●Corn Germ
Corn germ is the bud part of corn, which is the most nutrient part. 70% nutrient is in the corn germ. When producing oil with corn, you should extract germs first.
●Rapeseed
Rapeseed belongs to high oil content oilseed; it can be cultivated around the world. Rapeseed contains 33%—48% oil.
●Cottonseed
Cottonseed is the seed of cotton, which takes up 60%—62% of the ginned cotton weight. Cottonseed contains 15%—25% oil, and cotton kernel contains 28%—39% oil.
●Tea Seed
Tea seed has hull and contains 50%—72% kernel. The whole seed contains 30%—40% oil and the kernel contains 40%—60% oil. Tea seed belongs to the non-drying oil, has abundant unsaturated
fatty acid, which is good medicine and nutritional cooking oil.
