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Method for regulating and controlling activity of vanadium phosphorus oxide catalyst and application thereof

A vanadium phosphorus oxide, catalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. Effect

Active Publication Date: 2021-07-02
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, patent CN111841590A regulates the structure of vanadium-phosphorus-oxygen material through a binary mixed solvent composed of ionic liquid / eutectic mixture-water or ionic liquid / eutectic mixture-organic solvent; patent CN112076784A uses n-octane and anhydrous chlorine The amphiphilic deep eutectic solvent is synthesized by zinc chloride, and then the supported catalyst is synthesized through the sol-gel process. The above-mentioned patent improves the activity of the catalyst by adding a co-catalyst, but the process is relatively complicated

Method used

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  • Method for regulating and controlling activity of vanadium phosphorus oxide catalyst and application thereof
  • Method for regulating and controlling activity of vanadium phosphorus oxide catalyst and application thereof
  • Method for regulating and controlling activity of vanadium phosphorus oxide catalyst and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Preparation of Vanadium Phosphate Precursor

[0026] Weigh 20g V 2 o 5 Mix with benzyl alcohol and isobutanol, raise the temperature to 135°C and heat to reflux for 3 hours under mechanical stirring, then cool down to 75°C, add 16mL of phosphoric acid with a mass fraction of 85wt%, then raise the temperature to 135°C, and heat to reflux under continuous stirring After 16 hours, the product was filtered and dried to obtain a vanadium phosphorus oxide precursor (PVPO-Blank).

[0027] Preparation of deep eutectic solvents

[0028] Choline chloride was mixed with urea at a molar ratio of 1:2, heated to 80°C, and then stirred at 80°C for 3h until a clear solution was obtained and a deep eutectic solvent was obtained.

[0029] In the ball mill tank, mix the vanadium phosphorus oxide precursor with the choline chloride urea deep eutectic solvent according to the mass ratio of 50:1, add the balls according to the ball powder mass ratio of 1:1, then use the ball mill for 6 ho...

Embodiment 2

[0032] Preparation of Vanadium Phosphate Precursor

[0033] Weigh 20g V 2 o 5 Mix with benzyl alcohol and isobutanol, raise the temperature to 135°C and heat to reflux for 3 hours under mechanical stirring, then cool down to 75°C, add 16mL of phosphoric acid with a mass fraction of 85wt%, then raise the temperature to 135°C, and heat to reflux under continuous stirring After 16 hours, the product was filtered and dried to obtain a vanadium phosphorus oxide precursor (PVPO-Blank).

[0034] Preparation of deep eutectic solvents

[0035] Choline chloride was mixed with ethylene glycol at a molar ratio of 1:2, heated to 80°C, and then stirred at 80°C for 3h until a clear solution was obtained and a deep eutectic solvent was obtained.

[0036] In the ball mill tank, mix the vanadium phosphorus oxide precursor with the choline chloride ethylene glycol deep eutectic solvent at a mass ratio of 50:1, add balls at a ball powder mass ratio of 1:1, and then use a ball mill to mill for ...

Embodiment 3

[0039] Preparation of Vanadium Phosphate Precursor

[0040] Weigh 20g V 2 o 5 Mix with benzyl alcohol and isobutanol, raise the temperature to 135°C and heat to reflux for 3 hours under the action of mechanical stirring, then cool down to 75°C, add 16mL of phosphoric acid with a mass fraction of 85wt%, and then raise the temperature to 135°C, under continuous stirring Heating to reflux for 16 hours, filtering the product, and drying to obtain a vanadium phosphorus oxide precursor (PVPO-Blank).

[0041] Preparation of deep eutectic solvents

[0042] Choline chloride was mixed with butanediol at a molar ratio of 1:2, heated to 80°C, and then stirred at 80°C for 3h until a clear solution was obtained and a deep eutectic solvent was obtained.

[0043] In the ball mill tank, mix the vanadium phosphorus oxide precursor with the choline chloride butanediol deep eutectic solvent according to the mass ratio of 50:1, add balls according to the ball powder mass ratio of 1:1, and then ...

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Abstract

The invention relates to a method for regulating and controlling the activity of a vanadium phosphorus oxide catalyst. The method comprises the following steps that a vanadium phosphorus oxide precursor is prepared; in a ball milling tank, the vanadium phosphorus oxide precursor and a deep eutectic solvent are mixed according to the mass ratio of (20-100): 1, balls are added according to the ball-powder mass ratio of 1: (0.5-2), then a ball mill is used for ball milling for 4-8 h, a ball milling product is obtained, and the deep eutectic solvent is formed by choline chloride and organic polyol; and the ball milling product isactivated to obtain the vanadium phosphorus oxide catalyst. According to the method, the deep eutectic solvent is regulated and added, so that the activity and selectivity of the vanadium phosphorus oxide catalyst product are remarkably improved compared with those of the existing catalyst, the cost is low, the method is convenient and fast, and the method has important significance on industrial production.

Description

technical field [0001] The invention belongs to the field of chemical catalysis, and relates to a method and application for regulating and controlling the activity of a vanadium-phosphorus-oxygen catalyst. Background technique [0002] Maleic anhydride, referred to as maleic anhydride, also known as maleic anhydride, is a white needle-like crystal at room temperature. Because there are unsaturated carbonyl bonds and ethylenic bonds in the molecular structure of maleic anhydride, it can undergo, for example, alkylation , polymerization, redox, esterification and other reactions. At present, maleic anhydride ranks third in the world after acetic anhydride and phthalic anhydride. [0003] At present, the most effective catalyst for the oxidation of n-butane to maleic anhydride is the vanadium-phosphorus-oxygen catalyst, and its precursor preparation method has a great relationship with the catalytic activity. Therefore, in order to improve the activity of vanadium-phosphorus...

Claims

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Application Information

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IPC IPC(8): B01J27/198B01J37/00C07D307/60
CPCB01J27/198B01J37/0036B01J37/00C07D307/60
Inventor 张锁江刘瑞霞陈璠张瑞锐柳慧洲唐红果
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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