01-12-2016 дата публикации
Номер: US20160346768A1
Shaped catalyst bodies comprising a multielement oxide I having the general stoichiometry I [BiWO][MoZZFeZZZO](I), where Z=Ni or Co, Z=alkali metal or alkaline earth metal, Z=zinc, phosphorus, arsenic, boron, antimony, tin, cerium, vanadium, chromium or bismuth, Z=silicon, aluminum, titanium, tungsten or zirconiurn, Z=copper, silver, gold, yttrium, lanthanum and lanthanides, a=0.1 to 3, b=0.1 to 10, c=1 to 10, d=0.01 to 2, e=0.01 to 5, f=0 to 5, g=0 to 10, h=0 to 1 and x, y=numbers determined by the valence and abundance of the elements other than oxygen in I, as active composition are produced by preforming a mixed oxide BiWOby coprecipitation from an aqueous environment at a pH in the range from 1.5 to 3 and isolation of the precipitate by means of a mechanical separation process and mixing the preformed mixed oxide BiWOwith a precursor having the stoichiometry [MoZZFeZZZO], shaping the mixture to form shaped bodies and thermally treating and calcining the shaped bodies at elevated temperature to give the shaped catalyst bodies. The process leads to homogeneous precipitation products having a stoichiometric composition. It is an alternative to the energy-intensive production by spray drying. 1: A process for producing a shaped catalyst body comprising a multi-element oxide formula I as an active composition ,{'br': None, 'sub': 1', 'b', 'x', 'a', '12', 'c', 'd', 'e', 'f', 'g', 'h', 'y', '1, 'sup': 1', '2', '3', '4', '5, '[BiWO][MoZZFeZZZO]\u2003\u2003(I),'}wherein{'sup': '1', 'Zis at least one element selected from the group consisting of nickel and cobalt,'}{'sup': '2', 'Zis at least one element selected from the group consisting of alkali metals and alkaline earth metals,'}{'sup': '3', 'Zis at least one element selected from the group consisting of zinc, phosphorus, arsenic, boron, antimony, tin, cerium, vanadium, chromium and bismuth,'}{'sup': '4', 'Zis at least one element selected from the group consisting of silicon, aluminum, titanium, tungsten and ...
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