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Method for preparing catalyst Cu-Uio-66 for preparing methanol from synthesis gas

A technology of cu-uio-66 and uio-66, which is applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problem of difficulty in controlling the dispersion of active components, difficulty in precise control of preparation methods, and preparation conditions Sensitivity and other issues, to achieve high stability and catalytic activity, shorten the crystallization time, high activity effect

Inactive Publication Date: 2018-05-04
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalysts prepared by the precipitation method tend to have large particle sizes, low dispersibility, and excessive amounts of reactants. Although the impregnation method can obtain catalysts with active components on the surface of the carrier, the loading capacity is often low, and the dispersibility of the active components is difficult. control
On the other hand, the structure of the precursor often determines the structure and activity of the final catalyst, but the formation of these precursors is very sensitive to the preparation conditions, and the existing preparation methods are difficult to accurately control

Method used

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  • Method for preparing catalyst Cu-Uio-66 for preparing methanol from synthesis gas

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Experimental program
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Effect test

Embodiment 1

[0015] A preparation method of synthesis gas methanol catalyst Cu-UiO-66, the method may further comprise the steps:

[0016] Step 1, 5gCu(NO 3 ) 2 ·3H 2 0, 2.5g trimesic acid, 0.25g sodium carboxymethyl cellulose and 25g Schiffbase organically modified UiO-66 nanomaterials were added into 288g water, mixed evenly and the measured pH was 1.9, then in the ultrasonic oscillator, the ultrasonic frequency was adjusted to 35KHz, ultrasonic power 160W, ultrasonic vibration at room temperature for 10min;

[0017] Step 2. After the ultrasonic vibration is over, centrifuge the solution, take the upper solid and put it into 360ml of ethanol aqueous solution containing 1.5g of ammonium chloride, the volume ratio of ethanol to water is 1:2, and mechanically stir at a speed of 60rpm for 60min. Suction filtration obtains filter cake;

[0018] Step 3. Place the filter cake on a porous metal nickel carrier, and then place it in a microwave digester with a spraying device for reaction. Spr...

Embodiment 2

[0025] Step 1, 2.5gCu(NO 3 ) 2 ·3H 2 0, 2.5g trimesic acid, 0.25g sodium carboxymethyl cellulose and 25g Schiffbase organically modified UiO-66 nanomaterials were added into 288g water, mixed evenly and the measured pH was 1.9, then in the ultrasonic oscillator, the ultrasonic frequency was adjusted to 35KHz, ultrasonic power of 160W, ultrasonic vibration at room temperature for 10min; the rest of the steps are the same as in Example 1.

Embodiment 3

[0027] Step 3. Take 15g of the above-mentioned modified magnesium oxide powder and add it into a mixed alkali solution containing 0.5mol of sodium hydroxide and 0.1mol of anhydrous sodium carbonate and sonicate for 30min. Add 150g of MOF-199 nanomaterials to the above mixed solution under vigorous stirring at room temperature to obtain a suspension solution; All the other steps are the same as in Example 1.

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Abstract

The invention discloses a method for preparing a catalyst Cu-UiO-66 for preparing methanol from a synthesis gas, wherein Cu(NO3)2.3H2O, trimesic acid, sodium carboxymethyl cellulose, ammonium chloride, 2-amino terephthalic acid, zirconium tetrachloride and terephthalaldehyde are taken as the main raw materials, Schiff base organic modified UiO-66 is taken as a seed crystal, a hydrolysate of the sodium carboxymethyl cellulose and the trimesic acid are induced under the condition of ultrasonic treatment to have a coordination reaction with Cu<2+>, the crystallization time is greatly shortened, and the metal organic catalyst is rapidly prepared. The prepared organic modified metal catalyst Cu-UiO-66 has the advantages of high selectivity and fast kinetic equilibrium, and no secondary pollution in the technical process, and the catalyst is higher in stability and catalytic activity in the reaction for preparing methanol from synthesis gas.

Description

technical field [0001] The invention relates to a synthesis gas methanol catalyst Cu-UiO-66 and a preparation method thereof, belonging to the technical field of catalysts. Background technique [0002] Using syngas as raw material to produce methanol through liquid phase or gas phase catalytic reaction process is a main method used in industry at present. Copper-based catalysts are generally used in this process, where copper is considered as the main active component. However, the activity of copper alone is very poor, and the introduction of other components can greatly improve the activity and stability of the catalyst. The most commonly used preparation methods for copper-based catalysts are precipitation and impregnation, and some improved methods based on this. Catalysts prepared by the precipitation method tend to have large particle sizes, low dispersibility, and excessive amounts of reactants. Although the impregnation method can obtain catalysts with active comp...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J31/22C07C29/154C07C31/04
CPCC07C29/154C07C31/04C08G83/008B01J31/1691B01J31/2213B01J2531/48B01J35/23Y02P20/52
Inventor 高光珍张文孔令双
Owner XUZHOU NORMAL UNIVERSITY
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