Abstract
Ammonolysis of ω-chloroenanthic acid and ω-chloropelargonic acid was carried out in the presence of 25% aqueous ammonia + ammonium salt. When ammonium carbonate was comployed, the yield of ω-aminocarboxylic acid was good with the lower mole ratio of ammonia/ω-chlorocarboxylic acid and by-product (mainly ω, ω'-iminodicarboxylic acid) was small amount. For increasing the mole concentration of ammonia in liquid phase, using of as much as possible of larger volume ratio (vol. of total raw materials in the autoclave/capacity of autoclave) and adjusting of suitable reaction velocity gave better result when the reaction was carried out at lower temperature.
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