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    PROCESS FOR THE EPOXIDATION OF PROPENE
    67.
    发明公开
    PROCESS FOR THE EPOXIDATION OF PROPENE 审中-公开

    公开(公告)号：EP3433240A1

    公开(公告)日：2019-01-30

    申请号：EP17709116.2

    申请日：2017-03-10

    申请人： Evonik Degussa GmbH ,  thyssenkrupp Industrial Solutions AG

    发明人： WÖLL, Wolfgang ,  BRENDEL, Marc ,  JAEGER, Bernd ,  BREDEMEYER, Niels ,  KOLBE, Bärbel ,  ULLRICH, Norbert ,  BERNHARD, Maik

    IPC分类号： C07D301/12

    摘要： During start-up of a continuous epoxidation of propene with hydrogen peroxide in a methanol solvent with a shaped titanium silicalite catalyst in a tube bundle reactor with a cooling jacket, cooling medium is fed at the rate for full load of the reactor with a constant entry temperature of from 20° C. to 50° C., methanol solvent is fed at a rate of from 50 to 100% for full load of the reactor, hydrogen peroxide is fed at a rate that starts with no more than 10% of the rate for full load and is increased continuously or stepwise to maintain a maximum temperature in the fixed bed of no more than 60° C. and a difference between the maximum temperature in the fixed bed and the cooling medium entry temperature of no more than 20° C., and propene is fed at a rate of from 20 to 100% of the rate for full load, increasing the feeding rate when the molar ratio of propene to hydrogen peroxide reaches the molar ratio for full load.