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METHOD FOR PREPARING A VPO CATALYST

机译：制备vpo催化剂的方法

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摘要

The invention relates to a process for the preparation of a VPO catalyst comprising molybdenum and a vanadyl pyrophosphate phase, comprising the steps: a) providing a reaction mixture which comprises a V (V) compound, a P (V) compound, a Mo- Compound comprising a reducing agent and a solvent, b) reducing the V (V) compound with the reducing agent at least in part to vanadyl hydrogen phosphate to obtain an intermediate suspension, c) filtering the intermediate suspension from step b) to obtain an intermediate, d) drying the intermediate product at a temperature of at most 350 ° C. in order to obtain a dried intermediate product and e) activating the dried intermediate product at a temperature above 200 ° C., characterized in that in step a) a maximum of 0.2% by weight % Water, based on the weight of the reaction mixture, is present and no water is withdrawn during the reduction in step b). The invention further relates to a VPO catalyst which can be produced by the process according to the invention and a catalyst which contains the molybdenum-containing vanadium-phosphorus mixed oxide.
机译：本发明涉及制备包含钼和焦磷酸氧钒钒相的VPO催化剂的方法，其包括以下步骤：a）提供包含V（V）化合物，P（V）化合物，Mo-包含还原剂和溶剂的化合物，b）用还原剂将V（V）化合物至少部分还原成磷酸氢氧钒以获得中间体悬浮液，c）过滤步骤b）中的中间体悬浮液以获得中间体d）在至多350℃的温度下干燥中间产物以获得干燥的中间产物，以及e）在200℃以上的温度下活化干燥的中间产物，其特征在于，步骤a）a基于反应混合物的重量，存在最大0.2重量％的水，并且在步骤b）的还原过程中没有水被抽出。本发明进一步涉及可以通过根据本发明的方法生产的VPO催化剂，以及包含含钼的钒-磷混合氧化物的催化剂。

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