中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
Vol. 21 Special 2 August 2011 |
propane selective oxidation to acrylic acid
(Research and Development Center, Daqing Nanyuan Group Co., Ltd., Daqing 163517, China)
Abstract:The effects of the preparation procedure on the formation of crystal phases and catalytic performance of the MoVTeNbO mixed metal oxide catalysts in selective oxidation of propane to acrylic acid were investigated. The results show that the preferred drying method is the rotavapor method, which favors the formation of an effective crystal phase and suppresses the formation of impurity phases. The preferred calcination atmosphere is an Ar atmosphere. The MoVTeNb mixed metal oxide catalysts can be obtained by solution method after heat-treatment at 600 °C in an Ar atmosphere, via a rotavapor with a warm water bath at 60 °C, and a pH value of 4.0. The catalyst with a MoVTeNb molar ratio of 1.0:0.3:0.23:0.12 is the most effective and extremely active.
Key words: crystalline structure; propane oxidation; selective oxidation; acrylic acid; XRD