METHOD FOR HYDROGENATING C5 FRACTION AND METHOD FOR PRODUCING OLEFINES

摘要

PROBLEM TO BE SOLVED: To provide a hydrogenating method capable of reducing lowering of activity of a hydrogenation catalyst when hydrogenating a monoolefin and/or diolefin in a C5fraction and a method for producing olefins in which the C5fraction can effectively be utilized by mixing the C5fraction with naphtha. SOLUTION: The method for hydrogenating the C5fraction comprises hydrogenating a monoolefin and/or a diolefin after washing C5fraction containing the monoolefin and/or the diolefin with water. In the hydrogenating method, the C5fraction is washed with water by a method mixing the C5fraction with water by using a static mixer and separating free water by separation by standing. In the hydrogenating method, the C5fraction containing the monoolefin and/or the diolefin is preferably a C5fraction produced by thermal decomposition of naphtha and left after extracting isoprene by an isoprene extraction plant. COPYRIGHT: (C)2005,JPO&NCIPI