Fluidized bed catalyst for ammoxidating propylene to produce acrylonitrile

Abstract

The fluidized bed catalyst contains SiO2 carrier and catalyst composite with the chemical expression AaBbCcGedMneWfFegBihMoiOx, where A is at least two selected from Co, Ni, Cr, Ca, Mg, La, Ce and V; B is at least one selected from B, P and As. The catalyst of the present invention is suitable for use especially in the conditions of low reaction temperature, high reaction pressure and high propylene load to obtain high acrylonitrile yield and high ammonia converting rate. It may be used in industrial production.

Description

technical field [0001] The invention relates to a fluidized bed catalyst for producing acrylonitrile by ammoxidation of propylene. Background technique [0002] Acrylonitrile is an important organic chemical raw material, which is produced by ammoxidation of propylene. In order to obtain a fluidized bed catalyst with high activity and high selectivity, people have made a series of improvements through continuous exploration. Most of these improvements involve the active composition of the catalyst, focusing on the combination of the active components of the catalyst to improve the activity and selectivity of the catalyst, thereby achieving an increase in the single-pass yield of acrylonitrile and an increase in production load. [0003] After more than 30 years of development in the production of acrylonitrile by ammoxidation, the production capacity of the factory has reached a close balance with the market demand. At present, the main deve...

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Problems solved by technology

[0012] The purpose of the present invention is to overcome the problem that the catalyzer that exists in the above-mentioned literature does not relate to the problem of adapting to higher reaction pressure, high operating load and reaction performance under the condition of slightly lower reaction temperature, and to provide a new process for producing acrylonitrile by ammoxidation of propylene bed catalyst