Preparation of oxalyl chloride

Details Preparation of oxalyl chloride Preparation of oxalyl chloride

1979-10-15

1981-11-17

Helfin, Bernard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

560230, 204158HA, C07C 5158

Patent

active

043010920

ABSTRACT:
Oxalyl chloride is prepared by (i) first esterifying ethylene glycol with trichloroacetyl chloride, (ii) next photochemically chlorinating the ester which results from the step (i), i.e., ethylene glycol bis-trichloroacetate, and (iii) then decomposing the tetrachloroethylene glycol bis-trichloroacetate thus formed into the desired oxalyl chloride and trichloroacetyl chloride, said steps (i) and (iii) being conducted in the absence of any reaction solvent, other than the trichloroacetyl chloride, and the chlorination step (ii) being conducted at a temperature of from about 50.degree. to 200.degree. C.

REFERENCES:
patent: 2816140 (1957-12-01), Ellingboe et al.
Scattergood et al., J.A.C.S., vol. 72 (1950).

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