Extraction and rectification separation method for normal hexane and methyl cyclopentane

Abstract

The extraction rectification separation method for normal hexane and methyl cyclopentane comprises: adding the industrial hexane and dimethyl phthalate into the tower with given ratio; after separation, there is high-purity normal hexane on tower top, solution and methyl cyclopentane on tower kettle; putting the material in kettle to solution for distillation with methyl cyclopentane on tower top for further refine; recycling the solution. Wherein, the ratio is 1:3~5. This invention has recycle ratio more than 90% with purity more than 98%, and has no pollution.

Description

technical field [0001] The invention relates to a chemical separation method, in particular to an extraction and rectification separation method of n-hexane and methylcyclopentane. Background technique [0002] Both n-hexane and methylcyclopentane are important basic organic chemical raw materials and organic chemical solvents, and are widely used in chemical production. The reformed raffinate of refinery refinery units contains about 12% of n-hexane, and methylcyclopentane 1 to 2%. Since the boiling point of n-hexane (68.7°C) is close to the boiling point of methylcyclopentane (71.8°C), only industrial hexane with a content of 89-90% can be obtained through ordinary distillation methods, of which there are still about 10% of methylcyclopentane alkyl. If it is further separated by ordinary rectification method, the energy consumption will be too large. At present, this part of resources in our country has not been further developed and utilized. Taking Nanjing Oil Refiner...

AI Technical Summary

Problems solved by technology

If it is further separated by ordinary distillation, the energy consumption will be too large

Images