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Mo-V-Te-Sb-Nb-O catalyst and preparation method and application thereof

A mo-v-te-sb-nb-o, catalyst technology, applied in the field of catalysis, can solve the problem of low performance, and achieve the effect of improving selectivity and yield, excellent stability and catalytic activity

Active Publication Date: 2021-07-09
宁波昊祥新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using Sb with low volatility instead of Te element has always been the direction to solve this problem, but compared with Mo-Te-V-Nb system, Mo-Sb-V-Nb system has lower performance

Method used

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  • Mo-V-Te-Sb-Nb-O catalyst and preparation method and application thereof

Examples

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preparation example Construction

[0019] The preparation method of a kind of Mo-V-Te-Sb-Nb-O catalyst provided by the embodiment of the present invention comprises:

[0020] Depositing at least part of the antimony source onto the metal tellurium particles as the tellurium source to obtain the first raw material;

[0021] reacting the first raw material with a molybdenum source, a vanadium source, and a niobium source in a solvent to obtain a catalyst precursor;

[0022] The catalyst precursor is dried and calcined to prepare a Mo-V-Te-Sb-Nb-O catalyst.

[0023] In some embodiments, the preparation method includes:

[0024] Depositing at least part of the antimony source onto the metal tellurium particles as the tellurium source to obtain the first raw material;

[0025] The first raw material is reacted with the molybdenum source, the vanadium source and the niobium source in a solvent to obtain a slurry containing the catalyst precursor.

[0026] Further, the preparation method specifically includes: addi...

Embodiment 1

[0069] A kind of Mo-Te-Sb-V-Nb series catalyst of this embodiment is prepared by following steps 1)~step 3):

[0070] 1) Mixing and drying: add 370.8g of ammonium tetramolybdate and 65.4g of ammonium metavanadate to 900g of distilled water, stir and dissolve at 80°C, then add liquid A and 576g of ammonia water with a concentration of 2.0wt%, and continue to stir. When the temperature of the temperature drops to 50°C, keep stirring, and add liquid B to obtain a viscous precipitate, keep stirring for 5 minutes, then add 960g of ammonium nitrate to the reaction system, continue stirring, and finally spray dry the obtained liquid into powder.

[0071] Wherein liquid A and liquid B can be prepared by the following methods, including:

[0072] Mix 44.8g of tellurium dioxide, 34.5g of hydrazine and 800g of distilled water, and stir at 80°C for 4 hours and heat reduction to obtain needle-shaped particles containing metal tellurium (needles with an average length of 0.3 μm and an aver...

Embodiment 2

[0087] Embodiment 2 The preparation process of a kind of Mo-Te-Sb-V-Nb series catalyst of this embodiment is basically the same as that of Embodiment 1, the difference is:

[0088] In step 1), the atomic ratios of the vanadium source, tellurium source, antimony source, and niobium source to the molybdenum source are 0.1, 0.01, 0.07, and 0.3, respectively, and the atomic ratio of the tellurium source to the vanadium source is 0.3.

[0089] In step 1), ammonium tetramolybdate and ammonium metavanadate were stirred and dissolved in distilled water at 40° C., then A liquid and 576 g of ammonia water with a concentration of 2.0 wt % were added, and the stirring was continued to maintain the temperature of the reaction system at 40° C. And add liquid B to obtain a viscous precipitate. After continuous stirring, add ammonium nitrate (the molar ratio of ammonium nitrate to molybdenum source is 0.4) in the reaction system, continue stirring, and finally spray-dry the obtained liquid slu...

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Abstract

The invention discloses a Mo-V-Te-Sb-Nb-O catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: depositing an antimony source on metal tellurium particles serving as a tellurium source, reacting with a molybdenum source, a vanadium source and a niobium source in a solvent to obtain a catalyst precursor, and drying and roasting the catalyst precursor. The Mo-V-Te-Sb-Nb-O catalyst provided by the invention has excellent stability and catalytic activity, and when the Mo-V-Te-Sb-Nb-O catalyst is applied to a reaction for preparing acrylic acid from propane, the selectivity and yield of acrylic acid can be remarkably improved.

Description

technical field [0001] The invention relates to a metal oxide catalyst, in particular to a Mo-V-Te-Sb-Nb-O catalyst, its preparation method and its application in the process of preparing acrylic acid from propane, belonging to the technical field of catalysis. Background technique [0002] Acrylic acid is an important raw material for petrochemical, light industry and pharmaceutical production. It can be used to produce superabsorbent resin, synthetic resin and flocculant, etc., and its application range is still expanding. In general, in the presence of a Mo-Bi catalyst, acrolein and oxygen are produced by catalytic oxidation at about 400 °C, and then in the presence of a Mo-V catalyst, acrolein and oxygen are oxidized by catalytic oxidation at around 300 °C The reaction produces acrylic acid. [0003] In comparison, propane is a cheaper raw material than propylene, and many documents have disclosed the possibility of one-step oxidation of propane to acrylic acid. Moreov...

Claims

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Application Information

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IPC IPC(8): B01J23/28C07C51/21C07C57/04
CPCB01J23/28C07C51/21C07C57/04
Inventor 王成光黄庆
Owner 宁波昊祥新材料科技有限公司
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