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A kind of supported vanadium phosphorus oxide catalyst and preparation method thereof

A vanadium phosphorus oxide and catalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as low specific surface area, increased catalyst manufacturing cost, and different crystal phases. The effect of high surface area, many surface active centers, and large porosity

Active Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main crystal phase of the catalyst-supported vanadium phosphorus oxide prepared by this method is different from the common active phase [(VO 2 ) 2 P 2 o 7 ], and contains a certain amount of amorphous phase, and the specific surface area is relatively low (about 21~29m 2 / g), and at the same time add a large amount of polyethylene glycol as a dispersant, which increases the manufacturing cost of the catalyst

Method used

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  • A kind of supported vanadium phosphorus oxide catalyst and preparation method thereof
  • A kind of supported vanadium phosphorus oxide catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] exist figure 1 In the ebullated bed reactor shown, 30.0 g of vanadium pentoxide was added from the feeding port 1; put N 2 Bubble into the reactor through 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 110±2°C, keep the reaction time for 3 hours; then add 72g of nano-silica into the reactor from the feeding port 1, and reflux for 4 hours; feed the concentrated 85% concentration from the feeding port 1. Phosphoric acid was 38.0 g, and the phosphorus / vanadium molar ratio was 1.0. Continue to maintain the "boiling" reaction for 6 hours, and discharge from the reaction material outlet 3 after the reaction is completed. After the reaction solution was cooled to room temperature, it was filtered, and the filter cake was rinsed three times with a small amount of isobutanol, and then the filter cake was placed in an enamel tray to dry naturally at room temperature, then dried in an ...

Embodiment 2

[0059] exist figure 1 In the ebullated bed reactor shown, 30 g of vanadium pentoxide, 0.3 g of ferric nitrate as auxiliary agent, 0.5 g of auxiliary zirconium nitrate were added from feeding port 1; 690 mL of isobutanol and benzyl alcohol mixed solution, isobutanol / benzyl alcohol Volume ratio 15:1. put N 2 Bubble into the reactor through 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 100±2°C, keep the reaction time for 4 hours; then add nano-silica 80g to the reactor from the feeding port 1, and reflux for 3 hours; Phosphoric acid 35.5g, phosphorus / vanadium molar ratio of 1.1, continued to maintain the "boiling" reaction for 6 hours, and discharged from the reaction material outlet 3 after the reaction was completed. After the reaction solution was cooled to room temperature, it was filtered, and the filter cake was rinsed three times with a small amount of isobutanol, and then the...

Embodiment 3

[0065] exist figure 1 In the ebullated bed reactor shown, 30.0 g of vanadium pentoxide; 690 mL of a mixed solution of isobutanol and benzyl alcohol, and a volume ratio of isobutanol / benzyl alcohol of 20:1 was added from feed port 1. The helium gas was blown 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 98±2°C, keep the reaction time for 4 hours; then add nano-silica 92g to the reactor from the charging port 1, and reflux for 4 hours; pass into the concentrated 95% concentration from the charging port 1. Phosphoric acid was 34.0 g, and the phosphorus / vanadium molar ratio was 1.0. Continue to maintain the "boiling" reaction for 8 hours, and discharge from the reaction material outlet 3 after the reaction is completed. After the reaction solution was cooled to room temperature, it was filtered, and the filter cake was rinsed three times with a small amount of iso...

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Abstract

The invention discloses a supported type vanadium phosphorus oxide catalyst and a preparation method thereof. According to the catalyst, nano SiO2 is used as a carrier and vanadium phosphorus oxide is supported on the nano SiO2; the specific surface area is 120-250m<2> / g, and the grain size is smaller than 150 nm; the volume is used as a reference, the distribution of the grain size is as follows: particles of 60-90 nm accounts for 5-15 percent, particles of 90-120 nm accounts for 47-83 percent, and particles of 120-150 nm accounts for 12-40 percent. The catalyst is small in grain size, large in specific surface area, high in intensity and low in abrasion; when the catalyst is used for catalytic reaction for preparing maleic anhydride by n-butane oxidation, the n-butane conversion rate is high, and the maleic anhydride is high in selectivity.

Description

technical field [0001] The invention belongs to the catalyst preparation technology, and relates to a supported vanadium phosphorus oxygen catalyst and a preparation method thereof. Background technique [0002] Maleic anhydride is referred to as maleic anhydride, also known as maleic anhydride. It is an important organic chemical raw material and fine chemical product. It is the third largest acid anhydride in the world after phthalic anhydride and acetic anhydride. Its specific applications mainly include: Production of unsaturated polyester resins, alkyd resins, and pesticides, pharmaceuticals, coatings, inks, lubricant additives, paper chemicals, textile finishing agents, food additives and surfactants. In addition, maleic anhydride can be used as raw material to produce a series of fine chemical products with a wide range of uses, such as 1,4-butanediol, tetrahydrofuran, maleic acid, fumaric acid and tetrahydroic anhydride, and the development and utilization prospects ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/198B01J27/199B01J37/00C07D307/60
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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