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Catalyst for preparing maleic anhydride through oxidation of n-butane and preparation method thereof

A catalyst, n-butane technology, used in physical/chemical process catalysts, chemical instruments and methods, organic chemistry, etc., can solve problems such as insignificant improvement, achieve prevention of aggregation, good selective oxidation, and fine grain size Effect

Active Publication Date: 2018-12-21
常州新日催化剂股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned patents or documents improve the performance of the VPO catalyst by adding a co-catalyst, but the improvement is not significant

Method used

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  • Catalyst for preparing maleic anhydride through oxidation of n-butane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add 2700g isobutanol, 600g benzyl alcohol, 456g vanadium pentoxide and 25.8g silver citrate into a reactor equipped with stirring, heating and condensing reflux device. Stir evenly, control the temperature at 110℃~120℃, Pressure: -10kPa~-20kPa, add 540g phosphoric acid at a constant speed within 2h, then continue to reflux for 5h at this temperature and pressure, cool and filter after the reaction, and dry the filter cake at 110℃~130℃ for 20h, then 300℃ It is calcined at ~320°C for 6h to obtain an active precursor. The active precursor is granulated into 10 mesh to 40 mesh, mixed with 3% graphite, compressed into a hollow cylinder with an outer diameter of 5 mm, an inner diameter of 2 mm, and a height of 5 mm. Then, the oxygen content is 9% to 11 at 460℃~480℃ Activated in an atmosphere of %% for 6h to obtain catalyst A1.

Embodiment 2

[0042] In a reactor equipped with stirring, heating and refluxing devices, add 3000g of isobutanol and 600g of benzyl alcohol, then add 396g of vanadium pentoxide and 22.3g of silver citrate, stir well, control the temperature at 110℃~120℃, Pressure: -10kPa~-20kPa, add 596g phosphoric acid at a constant speed within 3h, then continue to reflux for 5h at this temperature and pressure, cool and filter after the reaction, and dry the filter cake at 110℃~130℃ for 20h, then 320℃ It is calcined at ~340°C for 6h to obtain an active precursor. The active precursor is granulated into 15 mesh to 30 mesh, mixed with 2% graphite, compressed into a hollow cylinder with an outer diameter of 5 mm, an inner diameter of 2 mm, and a height of 5 mm. Then, the oxygen content is 9% to 11 at 460℃~480℃ Activated in an atmosphere of %% for 6h to obtain catalyst A2.

Embodiment 3

[0044] Add 3300g isobutanol, 660g benzyl alcohol, 456g vanadium pentoxide and 27g rhodium isooctanoate in a reactor equipped with stirring, heating and condensing reflux devices. Stir evenly, control the temperature at 110℃~120℃, pressure -10kPa~-20kPa, add 540g phosphoric acid at a constant rate within 2h, then continue to reflux for 5h at this temperature and pressure, cool and filter after the reaction, and dry the filter cake at 120℃~140℃ for 18h, and then at 320℃~ It is calcined at 340℃ for 6h to obtain the active precursor. The active precursor is granulated into 15 mesh to 30 mesh, mixed with 2% graphite, compressed into a hollow cylinder with an outer diameter of 5 mm, an inner diameter of 2 mm, and a height of 5 mm. Then, the oxygen content is 9% to 11 at 460℃~480℃ Activated in an atmosphere of %% for 6h to obtain catalyst A3.

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Abstract

The invention discloses a catalyst for preparing maleic anhydride through oxidation of n-butane and a preparation method thereof, and belongs to the technical field of the catalyst. A catalyst promoter X (at least one of silver, ruthenium and rhodium) is added in the catalyst for preparing the maleic anhydride through the oxidation of the n-butane, a V-X dual-active center is formed in the catalyst, the catalyst has lower selective oxidation activity temperature, the reaction of preparing the maleic anhydride through the oxidation of the n-butane can be completed at lower temperature, and higher selectivity and higher yield of the maleic anhydride can be obtained; the catalyst is mainly used for catalyzing selective oxidation reaction of the n-butane so as to preparing the maleic anhydride.

Description

Technical field [0001] The present invention relates to a catalyst for preparing maleic anhydride by oxidation of n-butane and a preparation method thereof, and belongs to the technical field of catalysts. Background technique [0002] Maleic anhydride, also known as maleic anhydride and maleic anhydride, is an important organic chemical raw material. It is currently the world’s third largest anhydride after phthalic anhydride and acetic anhydride. It is used to produce unsaturated polyester resins and alkyd resins. , Pesticides, medicines, coatings, inks, lubricant additives, paper chemicals, textile finishing agents, food additives and surfactants, etc., can be used to produce a series of fine chemical products with a wide range of uses, and the development and utilization prospects are very broad. According to different raw materials, the production of maleic anhydride mainly includes two process routes: benzene oxidation and butane oxidation. In foreign countries, maleic anh...

Claims

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Application Information

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IPC IPC(8): B01J27/198C07D307/60
CPCB01J27/198C07D307/60
Inventor 刘先国魏士新王康军邹红旭胡佳陈鹏宋大朋潘蔚石龙
Owner 常州新日催化剂股份有限公司
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