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RECTIFYING COLUMN FOR EXTRACTIVE DISTILLATION OF CLOSE-BOILING OR AZEOTROPIC BOILING MIXTURES
RECTIFYING COLUMN FOR EXTRACTIVE DISTILLATION OF CLOSE-BOILING OR AZEOTROPIC BOILING MIXTURES
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机译:精馏塔用于密闭沸腾或共沸混合物的精馏
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摘要
The invention relates to a rectifying column for extractive distillation, comprising a column main section (204) and a raffinate section (205) above said main section, an evaporator (208) situated on the lower end of the column, an inlet (214) disposed between the main section of the column and the raffinate section and a solvent inlet (215) arranged on the top side of the raffinate section (205) for feeding an extracting agent. According to the invention, the main section (204) has two chambers (216, 217) connected in parallel. A stripping section (222) is disposed between the bottom of the column (221) and the main section (204), in which concentration of the extracting agent occurs from the top down. The bottom (221) is connected to the solvent inflow (215) by a device (223) for recycling the extracting agent.
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