METHOD OF PROCESSING BARK OF SIBERIAN LARCH

摘要

resin industry. SUBSTANCE: bark is extracted with boiling nonpolar solvent to recover coniferous wax and then treated with 3-7% hydrochloric acid solution in ethyl or isopropyl alcohol at 70-82 C to recover anthocyanidin dye. Remaining bark is processed into activated carbon. EFFECT: achieved processing completeness and increased recovery of wax and dye. 1 dwg, 2 tbl