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法国原子能委员会（ＣＥＡ，Ｐｉｅｒｒｅｌａｔｔｅ）的研究者们已为一项用于回收发动机油的工艺申请专利，该工艺使用超临界二氧化碳和陶瓷超滤膜去除杂质。试验表明，该工艺技术可回收９５％（体积分数）的可用油，废润滑油中含有的各种金属，如锌、铬和铁的去除率达９０％
Researchers at the French Atomic Energy Commission (CEA, Pierrelatte) have patented a process for recovering engine oil that uses supercritical carbon dioxide and ceramic ultrafiltration membranes to remove impurities. Tests show that the technology can be recycled 95% (volume fraction) of available oil, waste lubricating oil containing a variety of metals such as zinc, chromium and iron removal rate of 90%