Process for the manufacture of .alpha.-chloropropionyl chloride
AssigneeStauffer Chemical Company
InventorHarold M. Pitt
Life of this patent
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Abstract
A process of manufacture is disclosed herein, whereby .alpha.-chloropropionyl chloride, a compound which is useful as an intermediate in the production of N,N-diethyl 2(.alpha.-naphthoxy) propionamide, a useful herbicide, is produced by the chlorination of 1,2-dichloropropane to form 1,1,2-trichloropropane, which is cracked to form 1,1-dichloropropene-1, which is subsequently oxidized to produce the desired product, .alpha.-chloropropionyl chloride.
Claims24
A process for the manufacture of .alpha.-chloropropionyl chloride comprising the steps of
- a. reacting 1,2-dichloropropane in the liquid phase at a temperature in the range of from about 25.degree. C to 90.degree. C with gaseous chlorine in the presence of a catalyst selected from the group consisting of ferric chloride, aluminum chloride, iodine, sulfur, iron, iron in the presence of ultraviolet light and mixtures thereof, to form 1,1,2-trichloropropane, and separating the product 1,1,2-trichloropropane;
- b. reacting the 1,1,2-trichloropropane of step (a) with a base selected from aqueous or alcohol solutions of sodium and/or potassium hydroxides, alkaline earth metal hydroxides and sodium carbonate in the liquid phase or in the gaseous phase in the presence of a hydrogen chloride removing catalyst at a temperature in the range of from about 60.degree. C to 110.degree. C, and separating the product 1,1-dichloropropene-1;
- and
- c. reacting the 1,1-dichloropropene-1 of step (b) in the liquid phase at a temperature in the range of from about 24.degree. C to about 100.degree. C with oxygen in the presence of chlorine or bromine and an activating agent for the chlorine or bromine and further in the presence of a lower alkyl-primary- or -secondary-amide and recovering the produced .alpha.-chloropropionyl chloride.
A process for the manufacture of .alpha.-chloropropionyl chloride comprising reacting, 1,1-dichloropropene-1 in the liquid phase at a temperature in the range of from about 24.degree. to about 100.degree. C with oxygen in the presence of chlorine or bromine and an activating agent for the chlorine or bromine and further in the presence of a lower alkyl-primary- or -secondary-amide and recovering the produced .alpha.-chloropropionyl chloride.
Dependencies are inferred from the claim text.