- A 2 - chloro -5 - nitrapyrin preparation method
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The invention discloses a 2 - chloro - 5 - trichloromethyl pyridine method, comprises the following steps: (1) the 3 - methyl pyridine is mixed with a solvent, the vaporization of the drops in the vaporization vessel, then in order to inert gas as a carrier gas, to form raw material steam; (2) dry Cl respectively2 The raw material and the steam is sent to the quartz tube catalyst [...] generating vapor phase chlorination reaction, reaction material after the condensation, rectification to obtain 2 - chloro - 5 - trichloromethyl pyridine. The invention relates to a 2 - chloro - 5 - trichloromethyl pyridine method, with raw materials are easy, low cost, easy to operate, simple process and the like.
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Paragraph 0037-0038
(2019/03/15)
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- A METHOD FOR PRODUCING 2,3-DICHLORO-5-(TRICHLOROMETHYL)PYRIDINE
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The present invention relates to a novel process for producing of 2,3-dichloro-5-(trichloromethyl)pyridine by using PCl as chlorinating agent at elevated temperature and pressure.
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Page/Page column 17; 18
(2015/01/09)
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- Vapor phase catalytic chlorination of ?-picoline
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2-Chloro-5-trichloromethylpyridine is obtained by chlorinating β-picoline in the vapor phase using a Mordenite zeolite or a supported palladium catalyst.
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Page/Page column 3-4
(2008/06/13)
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