Preparation method of nickel liquid phase hydrogenation catalyst

Abstract

The invention belongs to the technical field of catalyst preparation, and concretely relates to a preparation method of a nickel liquid phase hydrogenation catalyst. The method has the advantages of easy control of the preparation process of the catalyst, easily available raw materials, and realization of stable performances of the catalyst. The preparation method of the nickel liquid phase hydrogenation catalyst, adopting a coprecipitation technology, concretely comprises the following steps: 1, preparing an alkaline silicon source solution, adding the alkaline silicon source solution to a reaction kettle with a stirring effect, heating the reaction kettle to 50-80DEG C, adding a filler, uniformly stirring above materials, and quantitatively neutralizing and precipitating the above obtained solution by using a nickel salt solution according to the nickel content for 15-30min; 2, adjusting the end point pH value to 7.0-8.0 by using a pH adjusting agent, ageing the obtained material at 60-80DEG C for 20-50min, fixing the obtained crystal form, washing the obtained material, and filtering the washed material to obtain a filter cake; and 3, drying the filter cake until plasticity, adding a binder, carrying out extrusion molding, and roasting the molded product at 400-800DEG C to obtain the hydrogenation catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a preparation method of a nickel-based liquid-phase hydrogenation catalyst. Background technique [0002] Butyl octanol is an important organic chemical raw material. With the development of petrochemical industry and oxo synthesis technology, the fermentation route and acetaldehyde condensation route of early starchy agricultural and sideline products have been eliminated one after another, and the production of butanol by oxo synthesis method (that is, propylene hydroformylation method) has developed rapidly. The production process is as follows: Propylene and synthesis gas (carbon monoxide and hydrogen) carbonylate crude aldehyde, which is refined to obtain n-butyraldehyde and isobutyraldehyde; hydrogenation to obtain the products n-butanol and isobutanol respectively; two molecules of n-butyraldehyde are condensed and dehydrated to form octenal, which is hydroge...

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Problems solved by technology

[0006] The Research Institute of Jilin Chemical Industry Co., Ltd. in China has conducted research on octenal liquid-phase hydrogenation catalysts. The catalyst developed was applied to the butanol unit of Jilin Chemical Industry Co., Ltd. Fertilizer Plant in September 1998. Judging from the operation of the catalyst , the operating life has exceeded the imported catalyst, indicating that the domestic production technology of the self-made octenal liquid-phase hydrogenation catalyst has matured, but there is still a certain distance between the activity and selectivity of the catalyst and the imported catalyst.