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    • 32. 发明授权
    • Process and catalyst for production of formaldehyde from dimethyl ether
    • 二甲醚生产甲醛的工艺和催化剂
    • US06781018B2
    • 2004-08-24
    • US10371908
    • 2003-02-20
    • Haichao LiuEnrique Iglesia
    • Haichao LiuEnrique Iglesia
    • C07C4537
    • B01J37/0201B01J23/22B01J23/28B01J35/0046C07C45/37C07C47/04
    • Dimethyl ether is converted to formaldehyde using a supported catalyst comprising molybdenum and/or vanadium oxides. The surface density of the oxide(s) ranges from greater than that for the isolated monomeric oxides upwards, so long as there is a substantial absence of bulk crystalline molybdenum and/or vanadium oxide(s). Conversion and selectivity to formaldehyde are improved as compared to data reported for known catalysts. Also disclosed is a supported catalyst comprising molybdenum and/or vanadium oxides wherein the support comprises one or more reducible metal oxides, preferably a layer or layers of one or more reducible metal oxides disposed on the surface of a particulate alumina or zirconia support.
    • 使用包含钼和/或氧化钒的负载催化剂将二甲醚转化成甲醛。 氧化物的表面密度比对于分离的单体氧化物的表面密度高,只要基本上不存在块状结晶的钼和/或氧化钒。 与已知催化剂报道的数据相比,甲醛的转化率和选择性得到改善。 还公开了包含钼和/或氧化钒的载体催化剂,其中载体包含一种或多种可还原的金属氧化物,优选一种或多层设置在颗粒氧化铝或氧化锆载体的表面上的可还原金属氧化物。