Technique for separating acetone and methanol

Abstract

The invention discloses a technique for separating acetone and methanol. The technique comprises the following steps: (1) earlier stage preparation; (2) baiting; (3) delivery and feeding; (4) distillation; (5) rectification; (6) acetone and methanol collection; and (7) kettle residue treatment. By separating the acetone and methanol by water extraction without adding any other extractant, the technique has the advantages of low cost and high efficiency, enhances the energy utilization efficiency, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of separation of acetone and methanol, in particular to a process for separating acetone and methanol. Background technique [0002] In the pharmaceutical industry, various acetone-containing waste liquids are discharged during the production of medical agents. Some acetone waste liquids contain a small amount of methanol. Due to technical reasons, it is impossible to separate acetone and methanol. [0003] The Chinese patent with the patent number CN 102190558 A discloses a method for separating the mixture of acetone and methanol. The 15th piece of the extractive distillation column with a theoretical plate number of 45 is used as the feeding plate, and the chlorine is fed through the feeding plate. Sodium chloride or potassium chloride aqueous solution, when the top reflux ratio of the extractive distillation tower is 4:1, the distillate with a temperature of 56-56.5°C is collected, namely acetone; The d...

AI Technical Summary

Problems solved by technology

Although acetone and methanol can be separated, it is necessary to use sodium chloride or potassium chloride aqueous solution as the extraction agent, which is prone to produce other products, and the mass fraction of acetone obtained can only reach 99.5%.