PROCESS FOR MANUFACTURING ACROLEIN FROM GLYCEROL
    52.
    发明公开
    PROCESS FOR MANUFACTURING ACROLEIN FROM GLYCEROL 有权
    用于制造丙烯醛由甘油

    公开(公告)号:EP2349969A1

    公开(公告)日:2011-08-03

    申请号:EP09783738.9

    申请日:2009-10-05

    申请人: Arkema France

    发明人: DUBOIS, Jean-Luc

    CPC分类号: C07C45/52 C07C47/22

    摘要: The subject of the present invention is a process for preparing acrolein by dehydration of glycerol in the presence of a catalyst system comprising oxygen, phosphorus and at least one metal chosen from vanadium, boron or aluminium. The process is preferably carried out in the gas phase in the presence of oxygen starting from aqueous solutions of glycerol. The process according to the invention makes it possible to obtain high acrolein selectivities.

    MEHRLAGEN-KATALYSATOR ZUR HERSTELLUNG VON PHTHALSÄUREANHYDRID
    53.
    发明授权
    MEHRLAGEN-KATALYSATOR ZUR HERSTELLUNG VON PHTHALSÄUREANHYDRID 无效
    层以上催化剂用于制备邻苯二甲酸酐

    公开(公告)号:EP1888229B1

    公开(公告)日:2011-08-03

    申请号:EP05813596.3

    申请日:2005-11-28

    申请人: SÜD-CHEMIE AG

    摘要: The invention relates to a multi-layered catalyst bed for producing phthalic anhydride by gas phase oxidation of o-xylol and/or naphtaline, which contains at least three differently composed catalyst layers, respectively an active mass, which are characterised as a first, second and/or third catalyst layer which leads from the gas inlet side to the gas outlet side. Said catalyst layers comprise an active mass containing TiO2 having a NA content of less that 0.3 wt. %, and the active mass content decreases from the first catalyst layer, which is placed in the direction of the gas inlet side, to the third catalyst layer, which is placed in the direction of the gas outlet side, under the proviso that (a) the first catalyst layer has an active mass content of between 7 and 12 wt. %, (b) the second catalyst layer has an active mass content in the region of between 6 and 11 wt %. The active mass content of the second catalyst layer is smaller or equal to the active mass content of the first catalyst layer, and (c) the third catalyst layer has an active mass content in the region of between 5 and 10 wt. %. The active mass content of the third catalyst layer is smaller or equal to the active mass content of the second catalyst layer. The invention also relates to a preferred method for producing said type of multi-layered catalyst bed, and to the preferred use of the titanium dioxide which is used according to the invention.