Synthesis method of 2,2,2',4',5'-pentachloroacetophenone
A technology of pentachloroacetophenone and synthetic methods, applied in two fields, can solve problems such as high usage of Lewis acid catalysts, excessive reaction residues, low product purity, etc., to avoid reaction rate, reaction degree, reaction The effect of thoroughness and purity improvement
Pending Publication Date: 2021-07-16
JIANGXI YONGTONG TECH
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The invention provides a synthesis method of 2,2,2',4',5'-pentachloroacetophenone. Raw materials comprise, by weight, 52-75 parts of 1,2,4-trichlorobenzene, 40-62 parts of dichloroacetyl chloride, 32-58 parts of a catalyst and 28-50 parts of water. A conventional temperature curve is broken, temperature change is utilized, and the catalyst is added at different time periods according to the proportion, so that the utilization rate of the catalyst is effectively improved, and the reaction degree is promoted to be more thorough; meanwhile, the catalyst adopts a carrier medium-Lewis acid compound, the carrier medium is prepared by utilizing the activity of microorganisms, and the catalyst is supported on a porous carrier, so that the activity of the catalyst is increased, the yield and the purity are improved, and the reaction rate and the reaction degree are prevented from being slowed down due to catalyst deposition in the reaction process; in addition, after the reaction is finished, an organic layer is washed and filtered by a high-efficiency filter membrane to further remove impurities, so that the purity of the product is effectively improved.
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