| production method | the preparation method is 2,4, 6-trichlorophenol, potassium hydroxide, the dichloroethane and the catalyst are added into the etherification kettle, heated to 105~110 ℃, the pressure in the kettle is 300 ~ 400kPa, reacted for 9H, cooled and discharged, and post-processed to obtain the finished product. 2-(2,4, 6-trichlorophenoxy) ethyl chloride can also be prepared from chloroethanol by adding trichlorophenol and a certain amount of sodium hydroxide in an autoclave and heating to dissolve the trichlorophenol, at about 75 ℃, chloroethanol was added dropwise, and the mixture was refluxed for 6H. At the end of the reaction, an appropriate amount of toluene was added, the toluene layer was separated, washed with water until neutral, dried and dissolved to obtain 2-(2,4, 6-trichlorophenoxy) ethanol, m. P. 74-75 °c. Take the above 2-(2,4, 6-trichlorophenoxy) ethanol, dissolve it in toluene, heat it to 50 ℃, add a certain amount of thionyl chloride Dropwise, heat it to 80 ℃, after completion of the reaction, it is reduced to room temperature, and a small amount of water is added to decompose the thionyl chloride, and then washed to neutral, and the light yellow liquid is obtained by desolvation, cooled to a solid state, and recrystallized with methanol to obtain a white needle-like crystal finished product. |
