CPC C07C 51/252 (2013.01) [B01J 21/063 (2013.01); B01J 21/18 (2013.01); B01J 27/199 (2013.01); B01J 35/0013 (2013.01); B01J 35/06 (2013.01); B01J 37/0009 (2013.01); B01J 37/04 (2013.01); B01J 37/088 (2013.01)] | 10 Claims |
1. A heteropolyacid catalyst for preparing (meth)acrylic acid by oxidation of (meth)acrolein, wherein the catalyst has a composition represented by the following formula:
x(Mo12PaCsbVcDeOf)+tC/yZ
wherein Mo12PaCsbVcDeOf is a primary catalyst of heteropolyacid salt, C is a nanocarbon fiber additive, and Z is a support/heat conducting diluent;
Mo, P, Cs, V and O represent elements of molybdenum, phosphorus, cesium, vanadium and oxygen respectively;
D represents at least one element selected from the group consisting of copper, iron, magnesium, manganese, antimony, zinc, tungsten, silicon, nickel, and palladium;
Z is selected from the group consisting of SiC, SiO2, MoO3, WO3, TiO2, and mixtures thereof in any ratios;
a, b, c, e, and f represent the atomic proportions of the elements, wherein a=0.1-3, b=0.01-3, c=0.01-5, e=0.01-2, and f is an atomic proportion of oxygen needed to satisfy the valences of the above components;
x, y represent the weights of the primary catalyst and the support/heat-conducting diluent Z, wherein y/x=11.1-50%;
t represents a weight of the nanocarbon fiber, t/x=3-10%; and
wherein the nanocarbon fiber has a diameter between 50-200 nm.
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