The paper present novel data on acidic hydrolysis of waste chicken feathersin presence of water solution containing carboxylic acid catalyst with the pKa value lower than 4, instirred batch reactors, in the temperature range from 114°Cto 150°C and at the pertinent vapour pressure of reaction mixture.The process was scaled-up from laboratory bench scale to pilot plant dimensions using batch high pressure autoclaves. Process conditions were applied according to patent application1. Knowledge of kinetic aspects of the featherhydrolysis and process parameters operation window are inevitable for asuccessful process scale up2,3.