FIELD: feed industry.
SUBSTANCE: invention relates to the feed industry. A method for obtaining a dry extract of Rhodiola rosea for a feed additive for farm animals and poultry is proposed, in which the raw material is crushed and moistened in a 9-10% aqueous ethanol solution for 10 hours, then transferred to an extractor, poured with a 30% aqueous ethanol solution, heated up 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-poured with a 50% water-ethanol solution, heated to 25°C and extraction is carried out under vacuum, after which the extract is drained, the resulting mass in the third stage is poured with distilled water and extraction is carried out at a module of 1 kg÷2 l for 30 minutes at a relative pressure of -0.92 kgf/cm2, after which the extract is also drained, the resulting extracts are combined and concentrated in a vacuum, and the thick extract is dried to dryness. When this dried leaves of Rhodiola rosea are crushed to a particle size of 5 mm. A method for producing a dry extract of Rhodiola rosea for a feed additive for farm animals and poultry is also proposed, in which the raw material is crushed and moistened in a 20% aqueous ethanol solution for 9 hours, then transferred to an extractor, poured into a 30% aqueous 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-poured with a 50% aqueous ethanol solution, heated to 25°C and extraction is carried out under vacuum, after which the extract is drained, the resulting mass at the third stage is poured with distilled water and extraction is carried out at a module of 1 kg÷2 l for 30 minutes at a relative pressure of -0.92 kgf/cm2, after which the extract is also drained, the resulting extracts are combined and concentrated in vacuum, and the thick extract is dried to dryness. In this case, the dried rhizomes of Rhodiola rosea are crushed to a particle size of 5 mm.
EFFECT: invention allows optimizing the modes of water-ethanol extraction and drying, reducing the consumption of reagents and the duration of the process, increasing the yield of the target product and its quality, as well as reducing the cost of subsequent purification, concentration and drying of the resulting product.
10 cl, 2 ex
