| abstract |
The invention discloses a composite catalyst and a preparation method and application thereof, wherein the catalyst is prepared from an active component precursor, a carrier and an oxidant; the active component precursor comprises a main active component precursor and an auxiliary active component precursor, wherein the main active component precursor is one or the combination of more than two of nitrate, acetate and chloride of transition metal elements, and the auxiliary active component precursor is one or the combination of more than two of nitrate, acetate and chloride of rare earth elements; the carrier is one or the combination of more than two of porous alumina, titanium oxide, montmorillonite, kaolin and molecular sieve; the oxidant is one or the combination of more than two of sodium hypochlorite, sodium chlorite, potassium permanganate and hexadecyl trichloroacetate. The invention has simple preparation technology, low price, high purification efficiency and no secondary pollution, and the product is not easy to inactivate and can be used for a long time. |