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A kind of preparation method of vanadium phosphorus oxygen catalyst

A catalyst, vanadium phosphorus oxygen technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic chemistry, etc., can solve the problems of unsatisfactory catalyst performance, insufficient concentration of particle size distribution, uneven grain size distribution, etc., to achieve crystal Concentrated particle size distribution, large contact surface, and high mass and heat transfer efficiency

Active Publication Date: 2016-11-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a large amount of polyethylene glycol dispersant is added in the preparation process of this method, and the obtained product has the problems of uneven grain size distribution and insufficient concentration of particle size distribution, and the activity and selectivity of the catalyst still need to be further improved.
[0010] The catalyst preparation method described in the prior art is relatively complicated, and there are many steps. When producing high-quality catalysts on the scale required for industrial production, it is necessary to strictly control the operating conditions of each step, so the performance of the catalysts obtained is often not ideal.

Method used

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  • A kind of preparation method of vanadium phosphorus oxygen catalyst
  • A kind of preparation method of vanadium phosphorus oxygen catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0056] in figure 1 In the fluidized bed reactor shown, 30.0 g of vanadium pentoxide is added from feed port 1; 690 mL of isobutanol and benzyl alcohol mixture, and the volume ratio of isobutanol / benzyl alcohol is 10:1. Will N 2 Blow into the reactor from the feed port 2 to keep the reaction liquid and solid particles in a "boiling" tumbling state. Increase the reaction temperature and keep it at 100±2°C and keep the reaction time for 3 hours; then pass 38.0 g of 85% concentrated phosphoric acid into the reactor from the feed port 1, and the phosphorus / vanadium molar ratio is 1.0. Continue to keep the "boiling" reaction for 6 hours, and the reaction ends. Adjust the reactor temperature and keep it at 120±2°C. Continue to inflate the gas and keep it "boiling" for 6 hours, and then evaporate the solvent to obtain the catalyst precursor powder. Subsequently, the catalyst precursor powder is calcined in the "boiling state" for 5 hours in the temperature range of 240±2°C to obtain ...

Embodiment 2

[0061] in figure 1 In the fluidized bed reactor shown, add 30g vanadium pentoxide, 0.3g ferric nitrate as auxiliary agent, 0.5g zirconium nitrate as auxiliary agent, and 690mL mixture of isobutanol and benzyl alcohol from feeding port 1 and isobutanol / benzyl alcohol The volume ratio is 15:1. Will N 2 Blow into the reactor from the feed port 2 to keep the reaction liquid and solid particles in a "boiling" tumbling state. Raise the reaction temperature and keep it at 97±2℃, keep the reaction time for 4 hours; then pass 35.5g of 100% concentrated phosphoric acid into the reactor from the feed port 1, and the phosphorus / vanadium molar ratio is 1.1, continue to maintain " After 5 hours of boiling, the reaction is complete. Adjust the reactor temperature and keep it at 140±2°C. Continue to inflate the gas and keep it "boiling" for 6 hours, and then evaporate the solvent to obtain the catalyst precursor powder. Subsequently, the catalyst precursor powder is calcined in the "boiling...

Embodiment 3

[0066] in figure 1 In the fluidized bed reactor shown, 30.0 g of vanadium pentoxide; 690 mL of a mixture of isobutanol and benzyl alcohol are added from the feed port 1 and the volume ratio of isobutanol / benzyl alcohol is 20:1. Blow helium into the reactor from the feed port 2 to keep the reaction liquid and solid particles in a "boiling" tumbling state. Increase the reaction temperature and keep it at 98±2°C and keep the reaction time for 4 hours; then pass 34.0g of 95% concentrated phosphoric acid into the reactor from the feed port 1 and the phosphorus / vanadium molar ratio is 1.0. Continue to keep the "boiling" reaction for 6 hours, and the reaction ends. Adjust the reactor temperature and keep it at 120±2°C. Continue to blow in the gas and keep it in a "boiling state" for 8 hours to evaporate the solvent to obtain the catalyst precursor powder. Subsequently, the catalyst precursor powder is calcined in the "boiling state" for 4 hours in the temperature range of 240±2°C to...

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Abstract

The invention discloses a method for preparing a vanadium-phosphorus-oxygen catalyst. The method includes the following contents: (1) adding a mixture of isobutanol and benzyl alcohol, vanadium pentoxide and additives into an ebullated bed reactor, and feeding Into the fluid, so that the material is in a "boiling state" tumbling state, the reactor is heated to the reaction temperature to react; then a certain amount of concentrated phosphoric acid is passed into the reactor to keep the "boiling state" to obtain blue or light blue Slurry reaction liquid; (2) Dry and roast the material in step (1) to obtain the precursor of the vanadium phosphorus oxygen catalyst, and the material remains "boiling" during the process; (3) Pass into the reactor Activate the gas to activate the catalyst precursor to obtain a vanadium phosphorus oxygen catalyst, and the material remains "boiling" during this process. The method has the advantages of simple process, high production efficiency and good repeatability. The prepared catalyst has small grain size, large specific surface area, high strength and low wear. High, maleic anhydride selectivity is good.

Description

Technical field [0001] The present invention is a catalyst preparation technology, which involves a preparation method for a phosphoring oxygen catalyst. Background technique [0002] Pinocyl dietic anhydride, referred to as cosmic anhydride, also known as Malay acid anhydride, is an important organic chemical raw material and fine chemical products. It is currently the third largest acidic anhydrial anhydrous anhydrous anhydrous anhydrous anhydrous anhydrous anhydrous anhydrous anhydrous anhydrous in the world.Production of unsaturated polyester resin, alcoholic acid resin, as well as pesticides, medicine, coatings, inks, lubricant additives, papermaking chemicals, textile finishing agents, food additives and surfactants.In addition, it can also produce a series of extensive use of fine chemical products such as 1,4-butanol, tetrahydrofuu, macaronic acid, pamine, and tetrahydride. The development and utilization prospects are very broad. [0003] The three basic routes produced ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/198C07D307/60B82Y40/00
Inventor 薛冬吕振辉乔凯王海波宋丽芝勾连科
Owner CHINA PETROLEUM & CHEM CORP
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