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.
Method for preparing 2,6-dichloropyridine by pyridine liquid-phase photochlorination
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Paragraph 0016-0027; 0028; 0029; 0031, (2019/01/23)
The invention relates to a method for preparing 2,6-dichloropyridine with product purity greater than or equal to 99.0% by using chlorotrifluoromethylbenzene as a solvent for a reaction between pyridine and chlorine. The preparing process comprises the steps as follows: by using the pyridine and the chlorine as initial raw materials and using the chlorotrifluoromethylbenzene as the solvent, continuously performing a chlorination reaction on the pyridine and the chlorine under the irradiation of ultraviolet light; and cooling a chlorination reaction product and the solvent to obtain pyridine chloride solution. The method has the advantages that 1, a precedent of directly preparing the 2,6-dichloropyridine in a high selectivity mode by a liquid-phase photochlorination reaction is set, and not only is the 2,6-dichloropyridine product with purity greater than or equal to 99.0% obtained, but also the method is easy for industrial production; and 2, not only is recycling of the separation solvent in the preparing process of the 2,6-dichloropyridine product with purity greater than or equal to 99.0% implemented, but also the aims of low pollution, low energy consumption and low cost in the preparing process are fulfilled.