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公开(公告)号：EP0747463A4
公开(公告)日：1999-02-03
申请号：EP95941854
申请日：1995-12-22
发明人： KUROKI TAKESHI
CPC分类号： C10G1/10 , Y10S585/95
摘要： The invention relates to the technology of liquefying waste plastics, particularly the technology of liquefaction utilizing the mechanism of extruders, in order to control effectively the cracking for effectively preventing carbon deposition and efficiently recovering the products with desirable compositions. To this end, waste plastics are continuously liquefied by thermally cracking the plastics while conveying the same through a multi-stage reactor composed of reactors 1a, 1b and 1c that are joined to each other and equipped with, respectively, conveying means 3a, 3b and 3c therein. More specifically the method comprises forming a melting zone and a cracking zone in order in the direction of conveyance in each reactor or a series of the reactors functioning as a unit, melt liquefying solid waste plastics in the melting zone, forming at the bottom of the reactor in the cracking zone a shallow liquid-phase portion comprising the liquid component formed in the melting zone, while forming above the liquid-phase portion a gas-phase portion that comprises the vapor component evaporated from the liquid-phase portion and that has a sufficiently large volume as compared with the liquid-phase poriton, and leading the vapor component filling the gas-phase portion to the outside, where the vapor component is cooled and recovered as an oily substance.
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