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Oil shell

Oil shell: vegetable oil in our country is a lot of more phyletic, the shell oil, such as walnuts, seeds, kernels, dried tea seed, sunflower seeds, coconut, oil palm, castor seed, safflower, etc., have a certain amount of leather case, and some oil skin shell is very hard, must be stripped before making oil.
Oil shell purpose: to improve the yield efficiency.

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In the general case, leather case of oil is mainly composed of cellulose and hemicellulose, oil content, if the shell pressing or leaching, or kernel contains shell, leather case will absorb part of the oil, affect the yield efficiency.