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Chromium-copper binary composite oxide catalyst and preparation method thereof

A binary compound and oxide technology, applied in the field of catalysis, can solve the problems of anti-sintering to be improved, and achieve the effect of low price, wide source and good dispersion

Active Publication Date: 2016-03-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the stability of composite metal oxides and the ability to resist sintering still need to be improved

Method used

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  • Chromium-copper binary composite oxide catalyst and preparation method thereof
  • Chromium-copper binary composite oxide catalyst and preparation method thereof

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preparation example Construction

[0025] The preparation method of chromium-copper binary composite oxide catalyst, concrete steps are as follows:

[0026] (1) Determine the general formula Cr of the chromium-copper binary composite oxide catalyst x Cu 1-x o 1+0.5x The value of x in the middle, and the value range of x is 0.2~0.8, then weigh Cr(NO 3 ) 3 9H 2 O and Cu(NO 3 ) 2 ·3H 2 0, add deionized water to dissolve and obtain metal ion solution;

[0027] (2) According to the molar ratio Cr x Cu 1-x o 1+0.5x :C 12 h 22 o 11 For a ratio of 1:2, weigh sucrose C 12 h 22 o 11 Add in the metal ion solution that step (1) makes, and stir to dissolve sucrose to obtain solution, Cr in the solution x Cu 1-x o 1+0.5x The molar concentration range of sucrose is 0.05-0.2mol / L, and the molar concentration range of sucrose is 0.1-0.4mol / L, and then the obtained solution is heated in a water bath at 70-90°C, and stirred until it evaporates to dryness to form a gel;

[0028] (3) drying the gel prepared in s...

Embodiment 1

[0032] Weigh Cr(NO 3 ) 3 9H 2 O was dissolved in deionized water, and then according to the molar ratio Cr(NO 3 ) 3 9H 2 O: C 12 h 22 o 11 Add sucrose C to the solution in a ratio of 1:2 12 h 22 o 11 , Cr(NO 3 ) 3 9H 2 The molar concentration of O is 0.05 mol / L, and the molar concentration of sucrose is 0.1 mol / L. The solution was heated and stirred in a water bath at 70°C until it was evaporated to dryness, then dried at 110°C for 12 hours, the mixture was ground into a fine powder of about 200 mesh, heated to 400°C at a heating rate of 5°C / min, After carbonization for 3 hours, the furnace was cooled to room temperature; then the temperature was raised to 900 °C at a rate of 5 °C / min, calcined in air atmosphere for 4 hours, and the furnace was cooled to room temperature to prepare a metal oxide catalyst.

Embodiment 2

[0034] Weigh Cu(NO3 ) 2 ·3H 2 O was dissolved in deionized water, and then according to the molar ratio Cu(NO 3 ) 2 ·3H 2 O: C 12 h 22 o 12 Add sucrose C to the solution in a ratio of 1:2 12 h 22 o 11 , Cu(NO 3 ) 2 ·3H 2 The molar concentration of O is 0.05 mol / L, and the molar concentration of sucrose is 0.1 mol / L. The solution was heated and stirred in a water bath at 70°C until it was evaporated to dryness, then dried at 110°C for 12 hours, the mixture was ground into a fine powder of about 200 mesh, heated to 400°C at a heating rate of 5°C / min, After carbonization for 3 hours, the furnace was cooled to room temperature; then the temperature was raised to 900 °C at a rate of 5 °C / min, calcined in air atmosphere for 4 hours, and the furnace was cooled to room temperature to prepare a metal oxide catalyst.

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Abstract

The invention relates to the technical field of catalysis, which aims to provide a chromium and copper binary compound catalyst and a preparation method thereof. A general formula of the chromium and copper binary compound catalyst is CrxCu1-xO1+0.5x, wherein x ranges from 0.2 to 0.8. The preparation method comprises the steps: determining the value of x in the CrxCu1-xO1+0.5x, weighing Cr(NO3)3.9H2O, Cu(NO3)2.3H2O and C12H22O11, adding deionized water and dissolving to obtain a solution, performing water bath heating until evaporating to form gel, drying the gel and grinding into powder, heating and pre-sintering the powder and then furnace-cooling, heating, roasting and furnace-cooling to prepare the chromium and copper binary compound catalyst. An active ingredient of the chromium and copper binary compound catalyst provided by the invention is high in content, wide in source and low in price; due to the interaction of chromium and copper oxides, the deactivation resistance is high.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a chromium-copper binary composite oxide catalyst and a preparation method thereof. Background technique [0002] Oxygen is the most widely distributed in nature. It is not only used to supply humans, animals and plants for respiration, but also has very important applications in many aspects such as rocket propellants, aerospace and diving. With the development of science and technology, chemical oxygen sources are widely used by people, especially in propellant and diving. [0003] At present, most of the chemical oxygen sources used by people are sodium chlorate as a raw material, because the decomposition temperature of sodium chlorate is low, and it has advantages such as safety in use. Compared with perchlorate with higher oxygen content, such as lithium perchlorate There are fewer applications in this area, because the decomposition temperature of perchlorate is relativ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/86C01B13/02
Inventor 张彦威周俊虎岑可法王智化刘建忠周志军黄镇宇杨卫娟程军
Owner ZHEJIANG UNIV
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