A kind of vanadium-phosphorus-oxygen catalyst for butane oxidation to maleic anhydride and preparation method thereof

Abstract

The invention discloses a vanadium phosphorus oxygen catalyst and a preparation method thereof. The nano-vanadium phosphorus oxide is used as a precursor, and it is obtained by first activating and then forming or first forming and then activating; the grain size of the nano-vanadium phosphorus oxide is less than 100nm, and its grain size distribution is as follows based on volume, The proportion of <15nm particles is 9-15%, the proportion of 15-30nm particles is 62-80%, and the proportion of 30-100nm particles is 11-23%. The nano-vanadium phosphorus oxide is prepared by adding a silane coupling agent in a submerged circulating impingement flow reactor. The catalyst of the invention is used in the catalytic reaction of n-butane oxidation to prepare maleic anhydride, the conversion rate of n-butane can reach 90-95 mol%, and the selectivity of maleic anhydride can reach 75-88 mol%.

Description

technical field

[0001] The invention relates to a vanadium phosphorus oxygen catalyst for preparing maleic anhydride by oxidation of butane and a preparation method thereof. The catalyst is suitable for the catalytic reaction process of preparing maleic anhydride by oxidation of n-butane. Background technique

[0002] Maleic anhydride, also known as maleic anhydride for short, is an important organic chemical raw material and the third largest organic anhydride in the world after phthalic anhydride and acetic anhydride. It is widely used in petrochemical, food processing, and pharmaceutical industries. , Building materials and other industries. Its specific applications include the manufacture of unsaturated polyester resins, alkyd resins, maleic acid (maleic acid), fumaric acid (fumaric acid), as well as pesticides, coatings, glass fiber reinforced plastics, lubricating oil additives, paper chemistry Product additives, surfactants, etc. The advent of the new method of mal...

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