2402-78-0Relevant articles and documents
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McKendry,Muelder
, p. 87,94 (1978)
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Production method of 2, 6-dichloropyridine
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Paragraph 0027-0060, (2020/05/01)
The invention discloses a production method of 2,6-dichloropyridine, which comprises the following steps: introducing pyridine, inert gas and chlorine into a photochlorination reaction device, and carrying out a photochlorination reaction at 150-195 DEG C under an ultraviolet light source which only emits light with the wavelength of 300-460nm.
Pyridine liquid phase light chlorinated preparation 2, 6 - dichloro pyridine method
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Paragraph 0012-0035, (2019/07/05)
The invention relates to a kind of the trifluoromethyl chlorobenzene as the solvent, 2 - chloro pyridine and chlorine as the raw material, process for preparing the product purity ≥ 99.0% of 2, 6 - dichloro pyridine production method, in order to 2 - chloro pyridine, chlorine as the starting material, trifluoromethyl chlorobenzene as the solvent, in the 150 °C -200 °C temperature, ultraviolet light irradiation under the continuous feed of the liquid phase chlorination reaction, to obtain the chloride, wherein the chloride in pyridine 2, 6 - dichloro pyridine content ≥ 97%, chlorinated rough steaming, crystallization separation or distillation purification process, get the purity ≥ 99.0% of 2, 6 - chlorinate, yield is greater than 90%. Advantages: produced by the reaction of 2, 6 - dichloro pyridine high selectivity, adding solvent to the reaction device overcomes the problem of exhaust gas easy blockage of the pipe, reaction process is easy to control, help to realize commercial process.