98-07-7Relevant articles and documents
Method for continuously dropwise adding benzenyl trichloride to synthesize benzoyl chloride
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Paragraph 0024; 0025; 0028; 0029; 0032; 0033, (2019/05/16)
The invention provides a method for continuously dropwise adding benzenyl trichloride to synthesize benzoyl chloride, and relates to the technical field of fine chemical synthesis, the method comprises the following steps: (1) carrying out a chlorination reaction on toluene and chlorine to prepare a benzenyl trichloride crude product; (2) continuously dropwise adding the benzenyl trichloride crudeproduct obtained in the step (1) into benzoic acid for synthesis reaction to prepare a benzoyl chloride crude product; (3) carrying out reduced pressure rectification on the benzoyl chloride crude product prepared in the step (2), and collecting the fraction to obtain a benzoyl chloride fine product; raw materials are easy to obtain and low in price, operation is simple, energy consumption is low, content is high, quality is stable, production cost is low, three wastes are less, the total yield of the product is 94-96%, the purity is more than 99%, and the method is suitable for industrial production and has a good application prospect.
CLEAN PROCESS FOR PREPARING CHLOROFORMYL-SUBSTITUTED BENZENE
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Paragraph 0125; 0139; 0151; 0163, (2017/12/17)
Clean process for preparing a chloroformyl-substituted benzene by oxidation of a tail gas hydrogen chloride from a chlorination reaction and a chloroacylation reaction and recycling of the resulting oxidation product chlorine gas into the chlorination reaction. The present invention provides a clean process for preparing a polymer-grade chloroformyl-substituted benzene.
Process for the preparation of benzoyl chloride
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Paragraph 0046, (2017/03/08)
The invention relates to a preparation method of benzoyl chloride and belongs to the technical field of the preparation of the benzoyl chloride. The preparation method of the benzoyl chloride comprises the following steps: (1) under the irradiation of an LED light source, firstly, adding a side reaction inhibitor, and then introducing chlorine into methylbenzene, and performing a heating and stirring reaction to obtain the crude product of benzyl trichloride; (2) heating benzoic acid for melting, and in the presence of a catalyst, adding the crude product of the benzyl trichloride obtained in the step (1) for reacting to obtain the crude product of benzoyl chloride; (3) purifying the obtained crude product of the benzoyl chloride by virtue of reduced pressure distillation, thereby obtaining the refined benzoyl chloride. The preparation method of the benzoyl chloride is simple to operate, short in reaction period, low in energy consumption, high in product purity and yield, low in production cost and suitable for industrial production.