Copper-based methanol synthesis catalyst and preparation method therefor

Abstract

The invention provides a preparation method for a copper-based methanol synthesis catalyst. The method comprises: (1) separately preparing aqueous solutions of a water soluble salt of copper and a water soluble salt of zinc, and mixing the aqueous solutions to obtain a copper-zinc mixed solution; (2) mixing water soluble carbonate and bicarbonate and preparing an aqueous solution of the mixture to obtain a double precipitator buffer liquid; (3) adding the copper-zinc mixed solution into the double precipitator buffer liquid during stirring, and stirring and aging the mixture to obtain a copper-zinc suspension; (4) separately preparing aqueous solutions of a water soluble salt of aluminum and a water soluble salt of transitional metal and / or a rare earth element, and mixing the solutions to obtain a carrier solution; (5) adding ammonia water into the carrier solution during stirring to obtain a carrier suspension; and (6) adding the carrier suspension into the copper-zinc suspension during stirring, and carrying out washing, filtering, drying, roasting and moulding treatment to obtain the copper-based methanol synthesis catalyst. The invention further provides a catalyst prepared by the method and use of the catalyst.

Description

Technical field [0001] The invention relates to a catalyst, in particular to a copper-based catalyst for methanol synthesis and a preparation method and application of the catalyst. Background technique [0002] Methanol is an important basic chemical raw material, which is widely used in the production of formaldehyde, methyl formate, acetic acid, medicines and pesticides, etc. It can also be used in new vehicle fuels and fuel cells. At present, industrial methanol generally contains CO and CO 2 And H 2 The main catalyst used in the production of syngas is Cu-Zn-Al catalytic system. However, the current copper-based catalysts still have the problems of poor thermal stability and short catalyst life. At the same time, based on the requirements of large-scale methanol production equipment and energy saving and consumption reduction, there is an urgent need to further improve the performance of existing methanol synthesis catalysts, such as improving the dispersion and stability o...

AI Technical Summary

Problems solved by technology

However, the specific surface area of ​​the catalyst still has a lot of room for improvement.

[0004] Chinese Patent Publication No. CN1356166A also introduces a copper-based methanol synthesis catalyst and its preparation method. It uses an acidic carbonate solution as a precipitant. The acidic carbonate can be one of sodium bicarbonate, potassium, and ammonium or more, but the document does not record the thermal stability test data of its catalyst

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