Double metal oxide catalyst and preparation method and application

A double metal oxide, catalyst technology, applied in metal/metal oxide/metal hydroxide catalyst, organic compound preparation, physical/chemical process catalyst, etc., can solve the problem of low selectivity of target products and easy metal catalysts Deactivation, low conversion rate of reactants, etc., to achieve the effect of single selectivity improvement, less time-consuming consumables, and high catalyst activity

Active Publication Date: 2022-07-19
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problems in the prior art, the present invention adds the second metal oxide SnO 2 Improve traditional metal oxide MoO 3 Catalytic performance and adding corresponding alcoholic solution treatment and other methods can significantly reduce reaction conditions, improve the conversion rate of reactants and the single selectivity of target product, which is also the innovation of the present invention, thereby solving the problem that metal catalysts in the prior art are easy to lose Activity, high reaction conditions, complex process, low conversion rate of reactants and low selectivity of target products, etc.

Method used

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  • Double metal oxide catalyst and preparation method and application
  • Double metal oxide catalyst and preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Methanol treatment of 6SnO 2 -1MoO 3 Preparation of catalyst:

[0041] a) SnCl with a mass of 7.012 g 4 .5H 2 O was completely dissolved in 100 mL of deionized water with a concentration of 0.2 mol / L, and 25-28% ammonia water was added to adjust pH=10;

[0042] b) Add (NH) with a mass of 0.589 g 4 ) 6 Mo 7 O 24 .4H 2 O is dissolved in the above solution of a), (NH 4 ) 6 Mo 7 O 24 .4H 2 O concentration is 0.033mol / L, fully stir and mix, add 0.047mol hydrochloric acid, and the molar amount of hydrochloric acid is 2 times the molar amount of metal (Sn+Mo) at this moment;

[0043] c) The white turbid solution obtained in b) was fully stirred, reacted in a 60°C oven for 1 hour, washed and filtered, vacuum dried at 40°C for 12 hours, and the obtained white product was calcined in a muffle furnace at 100°C for 10 hours Then calcined at 300 °C for 5 hours to obtain a dark green product, and after cooling to room temperature, ground into a powder state;

[0044] d...

Embodiment 2

[0046] Isopropanol treatment of 5SnO 2 -1MoO 3 Preparation of catalyst:

[0047] a) SnCl with a mass of 7.012 g 4 .5H 2 O was completely dissolved in 100 mL of deionized water with a concentration of 0.2 mol / L, and 25-28% ammonia water was added to adjust pH=8;

[0048] b) Then add (NH) with a mass of 0.706 g 4 ) 6 Mo 7 O 24 .4H 2 O is dissolved in the above solution of a), (NH 4 ) 6 Mo 7 O 24 .4H 2 O concentration is 0.04mol / L, fully stir and mix, add 0.036mol concentrated hydrochloric acid, and the molar amount of hydrochloric acid is 1.5 times the molar amount of metal (Sn+Mo) at this time;

[0049] c) The white turbid solution obtained in b) was fully stirred, reacted in a 60°C oven for 1 hour, washed and filtered, vacuum dried at 60°C for 10 hours, and the obtained white product was calcined in a muffle furnace at 200°C for 8 hours Then calcined at 400 °C for 5 hours to obtain a dark green product, which was ground into powder after cooling to room temperatu...

Embodiment 3

[0052] n-Butanol treatment of 4SnO 2 -1MoO 3 Preparation of catalyst:

[0053] a) SnCl with a mass of 7.012 g 4 .5H 2 O was completely dissolved in 100 mL of deionized water with a concentration of 0.2 mol / L, and 25-28% ammonia water was added to adjust pH=9;

[0054] b) Add (NH) with a mass of 0.883 g 4 ) 6 Mo 7 O 24 .4H 2 O is dissolved in the above solution of a), (NH 4 ) 6 Mo 7 O 24 .4H 2 O concentration is 0.05mol / L, fully stirring and mixing, adding 0.05mol hydrochloric acid, the molar amount of hydrochloric acid is 2 times the molar amount of metal (Sn+Mo) at this moment;

[0055] c) The white turbid solution obtained in b) was fully stirred, reacted in a 30°C oven for 2h, washed and filtered, vacuum dried at 60°C for 8h, and the obtained white product was calcined in a muffle furnace at 250°C for 8h Then calcined at 400 °C for 5 hours to obtain a dark green product, which was ground into powder after cooling to room temperature;

[0056] d) Take the dark...

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Abstract

The invention discloses a double metal oxide catalyst, a preparation method and application; the catalyst structure is xSnO 2 ‑yMoO 3 , 1≤x≤6, 1≤y≤6; different proportions of bimetallic oxide catalysts were synthesized by adding alcohol solution heating treatment method, and the pH of the soluble salt solution containing the active component Sn precursor was adjusted with ammonia water, and then the pH of the soluble salt solution containing the active component Sn was added. Soluble salt of Mo precursor, fully stirred and mixed, then added hydrochloric acid, heated, washed, filtered, and then vacuum-dried to obtain a white product. xSnO 2 ‑yMoO 3 catalyst. The catalyst effectively increases the active sites on the surface of the catalyst, further optimizes the catalytic performance, and provides a new method for the efficient conversion and utilization of lignin. The catalyst of the invention has the characteristics of cheap raw materials, green and environment-friendly reaction process, simple catalyst preparation and the like.

Description

technical field [0001] The invention relates to the technical field of catalysts, and relates to a preparation method and application of a bimetallic oxide catalyst for alcohol heating treatment; in particular, it relates to a new preparation method of a bimetallic oxide catalyst and its application in lignin model compounds. Background technique [0002] Energy is the basis for the survival and development of today's society, and it is also an important indicator to measure the comprehensive national strength and people's living standards. With the development of the economy and the growth of the world population, the demand for energy is increasing. In recent years, the burning of traditional fossil fuels has not only caused the continuous depletion of these non-renewable resources, but also caused serious environmental pollution. Therefore, the development of clean and renewable energy has become the research focus of the majority of scientific researchers. Among the many...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/28C07C37/50C07C39/04
CPCB01J23/002B01J23/28C07C37/50C07C39/04Y02P20/52
Inventor 纪娜李婷婷刁新勇王振娇刘庆岭宋春风
Owner TIANJIN UNIV
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