METHOD OF CURATIVE DIRT EXTRACT PREPARING Russian patent published in 1997 - IPC

FIELD: drug technology. SUBSTANCE: native dirt is diluted with water at ratio = (2: 0.9)-(2: 1.1) and poured into extractor apparatus where cold sterilization is carried out in an aqueous medium under pressure 66 atm for 15-20 min followed by pressure drop to atmospheric value at rate above 5 atm/s. Then extractor content is combined with the main extraction line including extractor, evaporator, condenser and accumulating capacity. The diluted dirt is extracted by circle continuous cycle involving CO₂-extraction, miscella pouring off into evaporator, evaporation of CO₂ and its the following condensing in condenser and the repeated feeding through accumulating capacity into extractor. After cycle termination of one portion of the diluted dirt (cycle time is 3-4 h) evaporator is detached from extractor, CO₂ is evaporated and extract is poured off from evaporator. The spent diluted dirt is settled firstly for 10-15 min, then extract content is separated from the main extraction line by high pressure gate and the diluted dirt is removed. EFFECT: improved method of preparing, ecology safety, decreased solvent consumption. 2 cl