Novel catalyst for preparing 4-Iodobenzonitrile

Abstract

The invention relates to a catalyst and a preparation method thereof, in particular to a novel catalyst for preparing 4-Iodobenzonitrile and a preparation method thereof. The preparation method comprises the following steps of: respectively dissolving and mixing the oxides or salts of all component elements in NiaTbPcSbdMeOx to form a uniform solution, pouring the solution into silica gel for dipping, then fully stirring, and standing for ageing for 10-48 hours; and after airing, activating to obtain the required catalyst, wherein a is equal to 1, b is equal to 0.5-1, c is equal to 0.5-2, d is equal to 0.3-1, e is equal to 0.1-0.3, x is equal to 0.3-0.4, M is an element Bi, Li, Co or K, and T is an element Mo or Ce. The catalyst in the invention has the advantages of wide application range, high selectivity and conversion rate and long service life, can be widely used for the nitrilization of aromatic heterocyclic hydrocarbon methyl, the nitrilization of (-CN) halogenated aromatics methyl, liquid-phase ammoxidated catalysts, as well as the dehydrated nitrilization (-CN) of aromatics chlorine benzyl groups and amide groups, and has wide application field and development prospect.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a novel catalyst for p-iooxynil and a preparation method thereof. Background technique [0002] P-iodobenzonitrile is an organic chemical intermediate and an important raw material for the synthesis of dyes, medicines, and polymer materials. Now it has attracted widespread attention as a modified product of existing polymer materials. The current industrial preparation method of p-iodobenzonitrile is to use p-iodotoluene and ammonia under the action of a catalyst to carry out the ammoxidation reaction. Generally, heavy metal oxides are used as catalysts. The existing catalysts are easy to sinter and absorb carbon to lose their activity, have a short service life and are easy to be lost, and the selectivity and active load of the catalyst are not high, resulting in a low conversion rate of the reaction. Therefore it is very beneficial to invent a new catalyst for io...

AI Technical Summary

Problems solved by technology

The existing catalysts are easy to sinter and absorb carbon and lose their activity, and their service life is short and easy to be lost. The selectivity and active load of the catalyst are not high, resulting in a low conversion rate of the reaction.

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