FIELD: feed industry.
SUBSTANCE: invention relates to the feed industry. A method for obtaining a dry extract of dried black mullein leaves for a feed additive for farm animals and poultry, characterized in that the raw material is crushed and moistened in a 30-60% water-ethanol solution for 10 hours, then transferred to an extractor, poured 45-75% - water-ethanol solution, heated to 25°C and at the first stage, extraction is carried out under vacuum, after which the extract is drained, and the mass is re-filled with 60-70% water-ethanol solution, heated to 25°C and extraction is carried out under vacuum, after which the extract is drained, the resulting mass is poured with distilled water at the third stage and extraction is carried out at a module of 1 kg÷2 l for 30 minutes at a relative pressure of (-0.92) - (-0.96) kgf/cm2, after which the extract is also drained, obtained the extracts are combined and concentrated in vacuo, and the thick extract is dried to dryness.
EFFECT: invention makes it possible to optimize water-ethanol extraction and drying modes, reduce the consumption of reagents and the duration of the process, increase the yield of the target product and its quality, as well as reduce the costs for subsequent purification, concentration and drying of the resulting product.
5 cl, 2 ex
