2745-49-5Relevant articles and documents
Preparation of 2, 5 - dichlorobenzonitrile method and special catalyst and its preparation method
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Paragraph 0021-0029, (2019/07/04)
The invention discloses a method for preparing 2, 5 - dichlorobenzonitrile method, the method comprises the following steps: 1) to dichlorobenzene with formaldehyde or/and paraformaldehyde as raw materials, in the chloromethylation and under the action of catalyst, through the chloromethylation reaction to obtain a chloromethylated product only 2, 5 - two chlorine animal pen chlorine; 2) the following steps 1) to obtain the product of 2, 5 - two chlorine animal pen chlorine as raw materials, with the ammonia gas, the oxygen in the catalyst under the action of the ammoxidation reaction 2, 5 - dichlorobenzonitrile. The invention also discloses a method for the preparation of 2, 5 - dichlorobenzonitrile method of special catalyst and its preparation method. The method of the invention compared with other methods, with the reaction raw materials are cheap and easy to obtain, by simple process, the reaction temperature is low, is friendly to the environment, a high degree of selectivity, higher advantage of the yield is high. Special catalyst with high selectivity and active; the preparation method is simple, low cost, has good thermal stability and mechanical strength, in the fixed bed and the fluidized bed reactor can be used on both.
