METHOD OF TANNING OUT OF COLLAGEN-CONTAINING WASTE OF CHROME TANNING FOR PROTEIN SUBSTANCE PREPARING

摘要

use: u043au043eu0436u0435u0432u0435u043du043du0430u00a0 industry. the essence of the u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0: u0440u0430u0437u0434u0443u0431u043bu0438 of u043au043eu043bu043bu0430u0433u0435u043du0441u043eu0434u0435u0440u0436u0430u0449u0438u0445 waste u0445u0440u043eu043cu043eu0432u043eu0433u043e u0434u0443u0431u043bu0435u043du0438u00a0 obtaining protein substances u043fu0440u043eu0432u043eu0434u00a0u0442 in two stages, the first stage is about u0431u0440u0430u0431u043eu0442u043au0443 waste yu - 12% of a solution of sulfuric acid with 95 - 100 & deg; c and u0436u0438u0434u043au043eu0441u0442u043du043eu043c ratio 0.9 - 1 for 20 - 30 minutes.at the 2nd stage by reaction of u0434u043eu0431u0430u0432u043bu00a0u044eu0442 gradually during boiling and u043fu0435u0440u0435u043cu0435u0448u0438u0432u0430u043du0438u0438 double the number of initially u0432u0437u00a0u0442u043eu0439 mass during the 50 - 60 m in and out during boiling for 4 to 5 hours before the u043fu043eu043bu0443u0447u0435u043du0438u00a0 homogeneous mass. then, in a u0434u043eu0431u0430u0432u043bu00a0u044eu0442 u043cu043eu0447u0435u0432u0438u043du0443 of 3.0 - 3.5% of the mass of waste, and the mixture is maintained during boiling for 20 - 30 min 1, table 2). yu