| 摘要 |
<p>There is provided a method and a system for purifying used oil. The methodcomprises passing a feed containing used oil through an organophilicnanofiltration membrane thereby allowing molecules having molecular weightlower than 1,000g/mol present in the used oil to filter through, and polishing thefiltered used oil to remove colouring of the used oil to thereby obtain purified usedoil. High molecular weight impurities are separated from the used oil with the useof nanofiltration membrane technology. Transmembrane pressure is appliedacross the membrane to allow the separation. With this method, the impuritiescontent is greatly reduced in the permeate.FIGURE 1</p> |
