BigPatents India

A detergent composition which comprises (A) an N-(long-chain acyl) neutral amino acid or a salt thereof, (B) an N-(long-chain acyl) neutral amino acid dipeptide or a salt thereof, and (C) an N-(long-chain acyl) neutral amino acid tripeptide or a salt thereof at a specific weight ratio and which is excellent in the ability to foam and foam retention and usable in washing the body or the hair to make it nongreasy and moist through drying; a detergent composition which contains (D) a higher fatty acid having 8 to 22 carbon atoms or a salt thereof at a specific weight ratio in addition to the above three components and which is enhanced in the creaminess of foam; and a process for the production of N-(long-chain acyl) neutral amino acids or salts thereof which comprises mixing a neutral amino acid with a long-chain fatty acid and at least one alkali substance selected from between sodium hydroxide and potassium hydroxide and keeping the obtained mixture under heating, if necessary, in an inert gas atmosphere, while continuously removing water formed by the reaction and which process permits the progress of dehydrative condensation at relatively low temperature in a short time and enables efficient production of N-(long-chain acyl) neutral amino acids or salts thereof without any catalyst.