Catalyst for preparing maleic anhydride by n-butane oxidation and preparation method thereof
A catalyst and n-butane technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic chemistry, etc., can solve the problems of insignificant improvement, achieve aggregation prevention, high maleic anhydride selectivity and yield, and crystallization Fine-grained effects
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0040] In a reaction kettle with a stirring, heating and condensing reflux device, add 2700g of isobutanol and 600g of benzyl alcohol, then add 456g of vanadium pentoxide and 25.8g of silver citrate, stir evenly, and control the temperature at 110°C to 120°C, Pressure -10kPa~-20kPa, add 540g of phosphoric acid at a constant speed within 2h, then continue to reflux reaction at this temperature and pressure for 5h, cool and filter after the reaction, dry the filter cake at 110℃~130℃ for 20h, and then dry it at 300℃ 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, pressed into a hollow cylinder with an outer diameter of 5mm, an inner diameter of 2mm, and a height of 5mm, and then heated at 460°C to 480°C with an oxygen content of 9% to 11 % atmosphere activated for 6h to obtain catalyst A1.
Embodiment 2
[0042] In a reaction kettle with a stirring, heating and condensing reflux device, add 3000g of isobutanol and 600g of benzyl alcohol, then add 396g of vanadium pentoxide and 22.3g of silver citrate, stir evenly, and control the temperature at 110°C to 120°C, Pressure -10kPa~-20kPa, add 596g of phosphoric acid at a constant speed within 3h, and then continue to reflux reaction at this temperature and pressure for 5h, cool and filter after the reaction, dry the filter cake at 110℃~130℃ for 20h, and then reflux at 320℃ 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, pressed into a hollow cylinder with an outer diameter of 5 mm, an inner diameter of 2 mm, and a height of 5 mm, and then heated at 460°C to 480°C with an oxygen content of 9% to 11 % atmosphere activated for 6h to obtain catalyst A2.
Embodiment 3
[0044]In a reactor with a stirring, heating and condensing reflux device, add 3300 g of isobutanol and 660 g of benzyl alcohol, then add 456 g of vanadium pentoxide and 27 g of rhodium isooctanoate, stir evenly, control the temperature at 110°C to 120°C, and the pressure -10kPa~-20kPa, add 540g of phosphoric acid at a constant speed within 2h, and then continue to reflux reaction at this temperature and pressure for 5h, cool and filter after the reaction, dry the filter cake at 120℃~140℃ for 18h, and then reflux at 320℃~ 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, pressed into a hollow cylinder with an outer diameter of 5mm, an inner diameter of 2mm, and a height of 5mm, and then heated at 460°C to 480°C with an oxygen content of 9% to 11 % atmosphere activated for 6h to obtain catalyst A3.
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More