Features:Extractive distillation is special kind of distillation method,is at the top of the column to close by joining than stay separate combination of high boiling point,low relative volatility of material(solvent),in order to change the tower of separation between components to relative volatility degrees,realization near boiling point thing or azeotrope separation.The key is one extractive distillation to choose the appropriate solvent separation to the greatest extent increase among the components of the relative volatility degrees,which can make the difficult thing is separated into easy separating thing is.Second,the main rectifying section by section ask fractions and solvent recovery period of the three sections of the design and calculation,three sections of tower pate number must be mutual matching to achieve the optimal separating offect,the solvent recovery period mainly depends on the tower plate tower nuber with distillate solvent composition and separation requirements and boiling point difference with main raw material feeding position composition and solvent extraction distillation effect.

Summarize:As biochemical pharmaceutical field the rapid development of high and new technology,original from natural born content materials of traditional extracting drug production methods cannot meet modern pharmaceutical technological’s needs.According to active natural material resources development,structure improvement,the rise of artificially synthesized emerging field,acetone,methanol,balcohol and amixture of organic flux as extraction solvent are used,and then Producing a lot of needs separation recycling residue mixed solvents,this bringing huge economic pharmaceutical pressure and energy consumption.In order to solve this problem,our company designs and manufactures a extraction distillation for nearly boiling point content and azeotrope separate,obtaines welcome and the high praise by the pharmaceutical factory.