Composite oxide, preparation method for same, and application thereof
AssigneesChina Petroleum & Chemical Corporation, Fushun Research Institute of Petroleum and Petrochemicals, Sinopec
InventorsShudong Zhang, Yingjie Jin, Xiangqian Ni, Jie Li, Xiwen Zhang, Xinwei Zhang
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Abstract
This invention relates to a composite oxide, production and use thereof as a methane selective oxidizing catalyst. The composite oxide has a composition as illustrated by the formula RhRxMoyVzOδ-α, wherein the symbols are as defined in the specification. When used as a methane selective oxidizing catalyst, the present composite oxide provides a high methane conversion and a high selectivity to the aimed products.
Claims17
A composite oxide, comprising a composition represented by a formula RhRxMoyVzOδ-α,
- wherein R is Ni, Co or a combination of Ni and Co, x=0-3.0, y=0.1-0.9, z=0.1-0.9, δ is a positive number at which a valency of oxygen in the composite oxide reaches a balance, α is 0 to δ/2,
- wherein when R represents the combination of Ni and Co, a molar ratio of Ni:Co is 0.01-20:1.
A process for producing a composite oxide, comprising:
- reacting a Rh source, a Mo source, a V source, an optional Ni source, and an optional Co source under reaction conditions to obtain the composite oxide,
- wherein an amount of the Rh source, an amount of the Mo source, an amount of the V source, an amount of the Ni source and an amount of the Co source are predetermined such that the composite oxide has a composition as represented by the formula RhRxMoyVzOδ-α, wherein R is Ni, Co or a combination of Ni and Co, x=0-3.0, y=0.1-0.9, δ is a positive number at which a valency of oxygen in the composite oxide reaches a balance, α is 0, when R represents the combination of Ni and Co, a molar ratio of Ni:Co is 0.01-20:1,
- optionally a step of partially reducing the composite oxide so that α ranges from more than 0 to δ/2, and
- optionally a step of supporting the composite oxide on a carrier.
Dependencies are inferred from the claim text.