Colloidal and dissolved impurities are more difficult to remove.
胶体和溶解性的杂质除去就要更困难。
The process of removing suspended, colloidal, and dissolved impurities from liquid petroleum products by filtering, adsorption, chemical treatment, distillation, bleaching, etc.
用过滤、吸附、化学处理、蒸馏、漂白等方法从液体石油产品中脱除悬浮、胶态及溶解杂质的过程。
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