OXIDATION CATALYST WITH SADDLE MOLDED ARTICLES-CARRIERS

FIELD: chemistry.SUBSTANCE: invention relates to a catalyst for oxidising acrolein to acrylic acid, a method for production thereof, use thereof for catalytic oxidation in the gaseous phase of acrolein to acrylic acid and a method of producing acrylic acid by acrolein gas phase oxidation with molecular oxygen on a fixed catalyst bed. Oxidation catalyst includes at least one inorganic oxide or ceramic molded carrier article with a BET surface area of less than 0.5 m/g, wherein BET surface area lower limit is 0.01 m/g, based on a support which is coated with formation of a solid coating having a catalytic activity of a multi-element oxide corresponding to general formula (I) MoVXXXXXO(I), where Xmeans W, Nb, Ta, Cr and/or Ce, Xmeans Cu, Ni, Co, Fe, Mn and/or Zn, Xdenotes Sb and/or Bi, Xmeans one or more alkali and/or alkali-earth metals and/or N, Xmeans Si, Al, Ti and/or Zr, a means a number ranging from 1 to 6, b denotes a number within range of 0.2 to 4, c denotes a number ranging from 0 to 18, preferably from 0.5 to 3, d denotes number from 0 to 40, e is number between 0 and 4, f is number between 0 and 40, and n is a stoichiometric coefficient of the oxygen element, which is determined by stoichiometric coefficients of elements other than oxygen, as well as their charge number in general formula (I), wherein the catalyst is free from noble metals, and the molded carrier article has a seat shape, the saddle surface of which in both main directions is curved in an opposite manner. Inorganic oxide or ceramic carrier, if necessary with combined use of a binding agent, is coated with multi-element oxide powder.EFFECT: catalyst has improved selectivity and is characterized by less pressure loss.9 cl, 4 dwg, 4 tbl, 3 ex Изобретение касается катализатора окисления акролеина до акриловой кислоты, способа его изготовления, его применения для каталитического окисления в газовой фазе акролеина до акриловой кислоты и к способу получения акриловой кислоты посредством окисления в газовой фазе акролеина молекулярным кислородом на неподвижном слое катализатора. Катализатор окисления включает по меньшей мере одно неорганическое оксидное или керамическое формованное изделие-носитель с площадью поверхности BET менее чем 0,5 м/г, причем нижняя граница площади поверхности BET составляет 0,01 м/г, в расчете на носитель, которое покрыто с образованием сплошной оболочки обладающим каталитической активностью мультиэлементным оксидом, соответствующим общей формуле (I)гдеXозначает