METHOD OF MAKING CATALYTICALLY ACTIVE GEOMETRIC MOULDED ARTICLES

摘要

FIELD: chemistry.SUBSTANCE: described is a method of making catalytically active geometric moulded articles K, which contain as active mass, a multi-element oxide I with general stoichiometric formula (I): [BiZ?O][BiMoFeZ?Z?Z?Z?Z?O](I), according to which Zdenotes tungsten or tungsten and molybdenum, under the condition that the amount of tungsten is at least 10 mol % of the total molar amount Z, Zdenotes an element or multiple elements selected from a group which includes nickel and cobalt, Zdenotes an element or multiple elements selected from a group which includes alkali metals, alkali-earth metals and gallium, Zdenotes an element or multiple elements selected from a group which includes zinc, phosphorus, arsenic, boron, antimony, tin, cerium, vanadium and chromium, Zdenotes an element or multiple elements selected from a group which includes silicon, aluminium, titanium, tungsten and zirconium, Zdenotes an element or multiple elements selected from a group which includes copper, silver, gold, yttrium, lanthanum and lanthanides, a is a number from 0.1 to 3, b is a number from 0.1 to 10, d is a number from 0.01 to 5, e is a number from 1 to 10, f is a number from 0.01 to 2, g is a number from 0 to 5, h is a number from 0 to 10, i is a number from 0 to 1, p is a number from 0.05 to 6, and x, y are respectively numbers defined by valence and number of atoms other than oxygen atoms in formula (1), wherein a fine mixed oxide BiZ'Ois formed in form of a starting mass A1, the particle diameterof which satisfies the conditionusing sources, other than oxygen, of elements of the component part T of the multi-element oxide I, represented by [BiMoFeZZ?Z?Z?Z?O], a homogeneous aqueous mixture M is formed in an aqueous medium, wherein: each of the sources used when forming the aqueous mixture M passes through a dispersion degree Q, characterised by that the particle diameter corresponds toand the aqueous mixture M contains bismuth, molybdenum, iron, Z, Z, Z, Zand Zin the stoichiometric formula (I*): BiMoFeZ?Z?Z?Z?Z?(I*); from the aqueous mixture M, by drying and controlling the dispersion degreea fine starting mass A2 is formed, the particle diameterof which satisfies the conditionthe starting mass A1 is mixed with starting mass A2 or the starting mass A1, starting mass A2 and a fine auxiliary moulding agent are mixed to obtain a fine starting mass A3, which contains elements of the multi-element oxide I other than oxygen that are introduced therein through starting mass A1 and A2, in stoichiometric formula (1**): [BiZ'][BiMoFeZ?Z?Z?Z?Z?]l (I**);geometric moulded articles V are formed from the fine starting mass A3; the moulded articles V undergo heat treatment at high temperature to obtain catalytically active geometric moulded articles K, wherein the stoichiometric coefficient "c" lies in the range 0