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    Process for the production of ethylene glycol
    47.
    发明授权
    Process for the production of ethylene glycol 有权

    公开(公告)号：US11008269B2

    公开(公告)日：2021-05-18

    申请号：US16977758

    申请日：2019-03-14

    申请人： Avantium Knowledge Centre B.V.

    发明人： Paula Dekker ,  Jan Cornelis Van Der Waal ,  Gerardus Johannes Maria Gruter ,  Jagdeep Singh ,  Benjamin McKay

    IPC分类号： C07C29/132 ,  B01J23/30 ,  C07C31/20

    摘要： A process for the production of ethylene glycol including the steps of: (i) providing, to a first reactor, a carbohydrate source, a solvent, hydrogen, a first heterogeneous catalyst, which first heterogeneous catalyst contains one or more transition metals from groups 8, 9 and 10 of the Periodic Table of the Elements, and a homogeneous catalyst, which homogeneous catalyst contains tungsten; (ii) reacting, in the first reactor, at a temperature in the range from equal to or more than 170° C. to equal to or less than 270° C., at least a portion of the carbohydrate source in the presence of the hydrogen, the solvent, the first heterogeneous catalyst and the homogeneous catalyst; (iii) removing, from the first reactor, a first reactor product stream and separating from such first reactor product stream at least: one ethylene glycol rich fraction; and one sorbitol-rich fraction containing concentrated homogeneous catalyst; (iv) providing, to a second reactor, hydrogen and at least part of the sorbitol-rich fraction, containing concentrated homogeneous catalyst; (v) reacting, in the second reactor, at a temperature in the range from equal to or more than 200° C. to equal to or less than 300° C., at least a part of the sorbitol-rich fraction, containing concentrated homogeneous catalyst, in the presence of the hydrogen, a second heterogeneous catalyst, which second heterogeneous catalyst contains one or more transition metals from groups 8, 9 and 10 of the Periodic Table of the Elements; (vi) removing, from the second reactor, a second reactor product stream.

    MULTILAYER CATALYTIC BED FOR THE PARTIAL OXIDATION OF N-BUTANE TO MALEIC ANHYDRIDE
    50.
    发明申请
    MULTILAYER CATALYTIC BED FOR THE PARTIAL OXIDATION OF N-BUTANE TO MALEIC ANHYDRIDE 有权

    公开(公告)号：US20210031160A1

    公开(公告)日：2021-02-04

    申请号：US16941930

    申请日：2020-07-29

    申请人： POLYNT S.P.A.

    发明人： Silvia LUCIANI ,  Federico FOLCO ,  Mario NOVELLI ,  Stefano GORI

    IPC分类号： B01J8/00 ,  B01J27/18 ,  C07D307/60 ,  B01J23/30 ,  B01J23/18

    摘要： A catalytic bed for the partial oxidation of n-butane to maleic anhydride which comprises at least one first catalytic layer and at least one second catalytic layer, wherein each catalytic layer consists of a vanadium and phosphorus mixed oxide (VPO) catalyst and only the catalyst of the second catalytic layer further comprises tungsten, and wherein the second catalytic layer constitutes 25% to 45% of the total length of the catalytic bed and is arranged consecutively after the first catalytic layer along the direction in which the mixture of gases comprising the oxidation reagents flows. The present invention also relates to a process for producing maleic anhydride by partial oxidation of n-butane which uses the catalytic bed.