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    • 2. 发明授权
    • Supported catalyst for the oxidation of acrolein into acrylic acid
    • 用于将丙烯醛氧化成丙烯酸的负载型催化剂
    • US4289654A
    • 1981-09-15
    • US100807
    • 1979-12-06
    • Natale BertoliniNatale Ferlazzo
    • Natale BertoliniNatale Ferlazzo
    • B01J23/88B01J23/887B01J23/888C07C51/25B01J23/20B01J23/24
    • B01J23/8878B01J23/8885C07C51/252B01J2523/00
    • Catalyst active in the oxidation of acrolein into acrylic acid, which comprises a silica or alumina support and from 15 to 80% by weight, with respect to the catalyst, of a catalytically active part having the following chemical compositionMo.sub.a V.sub.b W.sub.c Cu.sub.d X.sub.x O.sub.ywherein X is Cr, Mn, Fe, Co, Ni, Zn, Cd, Al or Sb and wherein for a=12, b ranges from 4 to 8, c ranges from 1 to 4, d ranges from 2 to 5, x ranges from 0 to 1 and y ranges from about 17 to about 72; said active part having an amorphous and bidimensional structure with an interplanar distance of 3.98 A and an IR spectrum with a broad band at 860 cm.sup.-1. The catalyst is obtained by impregnation of the support with an aqueous solution of decomposable salts of the metals of said active part, drying and activation in an oxidizing atmosphere and then in an inert atmosphere, the cycle of impregnation, drying and activation being then repeated at least one time and the activation of the last cycle being followed by a thermal treatment in an oxidizing atmosphere.
    • 将丙烯醛氧化成丙烯酸的催化剂,其包含二氧化硅或氧化铝载体和相对于催化剂为15至80重量%的具有以下化学组成的催化活性部分MoaVbWcCudXxOy其中X为Cr,Mn ,Fe,Co,Ni,Zn,Cd,Al或Sb,其中a = 12,b为4-8,c为1至4,d为2至5,x为0至1,y为 范围为约17至约72; 所述活性部分具有晶面距离为3.98A的无定形和二维结构,在860cm -1具有宽带的IR光谱。 催化剂通过用所述活性部分的金属的可分解盐的水溶液浸渍载体而获得,在氧化气氛中干燥和活化,然后在惰性气氛中,然后将浸渍循环,干燥和活化反应在 至少一次,最后一个循环的激活随后在氧化气氛中进行热处理。