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DIFLUOROCHLORACETYL, DICHLORACETYL AND TRICHLORACETYL CHLORIDE PREPARATION
DIFLUOROCHLORACETYL, DICHLORACETYL AND TRICHLORACETYL CHLORIDE PREPARATION
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机译:二氟氯乙酰,二氯乙酰基和三氯乙酰氯的制备
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摘要
A process is disclosed for preparing chlorodifluoracetyl chloride from 1,1,-difluor-2,2-dichlorethylene, dichloracetyl chloride from trichlorethylene or 1,1,2,2-tetrachlorethane and trichloracetyl chloride from tetrachlorethylene. Said starting compounds are continuously reacted in the gaseous phase with oxygen to obtain a photochemical oxidation reaction, chlorine being optionally added as a sensitiser. When chlorine is added, the reaction mixture is irradiated with light with a wavelength μ ≥ 280 nm. The reaction is preferably carried out without pressure. Particularly high yields with high selectivity are reached by using doped high-pressure mercury-vapour lamps.
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