Preparation method of large-scale methanol catalyst

Abstract

The invention relates to a preparation method of a large-scale methanol catalyst, and belongs to the technical field of catalysts. The preparation method comprises the following steps: performing a coprecipitation aging reaction on a mixed solution of alkaline earth metal nitrate and aluminum nitrate and an alkaline solution; filtering, washing, drying and calcining reaction slurry, and forming an auxiliary compound; performing a coprecipitation aging reaction on a solution containing copper nitrate, zinc nitrate and aluminum nitrate and the alkaline solution, adding the auxiliary compound, filtering, washing, drying, calcining and forming the slurry, and obtaining the methanol catalyst. According to the preparation method, the auxiliary compound is added during the preparation of the methanol catalyst, and can wrap the surface of a carrier compound to alleviate the mutual action of active components and the carrier compound, so as to affect the quantity and the dispersing performance of the active center of the catalyst, so that the performance of the catalyst can be improved. The preparation method is easy to operate, and the raw materials are low in cost and readily available; the heat resistance, the thermal stability, the high-temperature activity and the methanol selectivity of the methanol catalyst can be obviously improved; the catalyst is a catalyst suitable for large-scale synthesis of methanol.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a methanol catalyst, in particular to a preparation method of a large-scale methanol catalyst. Background technique [0002] As an important branch of the coal chemical industry, the coal-to-methanol industry has developed rapidly and grown rapidly in the past ten years. my country's methanol production uses coal as the main raw material, the industrial structure is not reasonable, and the scale of the equipment is relatively small. At the same time, the disorder of the methanol market has caused a lot of waste of energy and funds. Therefore, in order to meet the development needs of the national coal chemical industry strategy, it is necessary to vigorously promote the large-scale methanol plant and realize the scale effect of the methanol production plant to the greatest extent. [0003] The advantages of large-scale chemical synthesis of methanol are very obvious. Its larg...

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Problems solved by technology

The catalyst adopts co-precipitation to form modified active component precipitate and modified carrier precipitate, which has high catalytic activity, but the selectivity of dimethyl ether and ethanol is low, so it is not suitable for large-scale chemical synthesis of methanol production.

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