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Process for Preparing Improved Catalysts for Selective Oxidation of Propane Into Acrylic Acid
Process for Preparing Improved Catalysts for Selective Oxidation of Propane Into Acrylic Acid
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机译:制备用于丙烷选择性氧化为丙烯酸的改良催化剂的方法
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摘要
The invention concerns the selective oxidation of propane into acrylic acid using highly selective catalysts and relates more particularly to a process for preparing these improved catalysts and their use for the production of acrylic acid from propane. The improved catalysts having the formula: Mo1Va(Te and/or Sb)b(Nb and/or Ta)cSidOx wherein a is between 0.006 and 1, b is between 0.006 and 1, c is between 0.001 and 0.5, d is between 0 and 3.5, and x is dependant on the oxidation state of the other elements, are obtained by adding a doping agent constituted by at least one component selected from Nb and Ta to a mainly orthorhombic phase prepared by hydrothermal method of a Mo—V—(Te and/or Sb)—O mixed metal oxide, optionally containing Nb and/or Ta and/or Si.
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机译:本发明涉及使用高选择性催化剂将丙烷选择性氧化为丙烯酸的方法,更具体地涉及制备这些改进的催化剂的方法及其在由丙烷生产丙烯酸中的用途。具有以下分子式的改进催化剂:Mo 1 Sub> V a Sub>(Te和/或Sb) b Sub>(Nb和/或Ta) c Sub> Si d Sub> O x Sub>其中a在0.006和1之间,b在0.006和1之间,c在0.001和0.5之间,d在0和之间3.5,并且x取决于其他元素的氧化态,是通过将由选自Nb和Ta中的至少一种成分构成的掺杂剂添加到通过Mo-V-(Te的水热法制备的主要正交晶相中而获得的。和/或Sb)-O混合金属氧化物,任选地包含Nb和/或Ta和/或Si。
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