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A second plant for an oil-recycling process

By Chemical Engineering |

Following up on its success with the world’s first commercial plant to use a new oil-recycling process, Puralube GmbH (Elsteraue, Germany; edlinks.chemengonline.com/6895-538) plans to build a second plant near the first one, in Zeitz/Elsteraue. Scheduled for startup at the end of 2008, it will have the same capacity as the first, at approximately 80,000 m.t./yr of used oil. Christian Hartmann, managing director, says that in coming years the company plans to build, own and operate similar refineries in Europe, the U.S., China and elsewhere. The process, called HyLube, was developed by UOP LLC (Des Plaines, Ill.; edlinks.chemengonline.com/6895-539). It converts used lubricating oils into API Group II-quality lube base oils, along with some naphtha and diesel fuel. Raw used oil is heated to reaction temperature by direct contact with a hot, circulating H2 stream before it is fed to the reactors. Some 50–70% of the feed is vaporized by the hydrogen, says Tom Kalnes, a senior R&D associate with UOP. The H2-rich vapor stream is separated from the remaining liquid and fed to the two-stage reaction, where the feed is decontaminated, then converted over proprietary catalysts at 300–350°C and 870–1,200 psig.…
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