Method for separating ethyl acetate-ethyl alcohol compound

An ethyl acetate and mixture technology, which is applied in the field of novel extractant for separating ethyl acetate-ethanol mixture, can solve the problems of reduced tower efficiency, small processing capacity, and high operating cost, achieves optimized production process, simple production device, and is beneficial to industrialization Effect
CN103467286AInactive Publication Date: 2013-12-25TIANJIN CLEANTECH TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN CLEANTECH TECH
Publication Date
2013-12-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for separating ethyl acetate-ethyl alcohol, which comprises the following steps: adopting ethyl acetate-ethyl alcohol compound in any proportion as a raw material, taking ionic liquid or a double solvent composed of ionic liquid and an organic solvent as an extraction agent, and extracting ethyl acetate and ethyl alcohol in sequence after the raw material goes through an extractive distillation stage and an extraction agent recycle stage, wherein the extraction agent is used circularly after being extracted in the recycle stage. Compared with the prior art, the new method has the advantages that the energy can be conserved by more than 40%, the environment pollution can be avoided, the product purity is high, the industrialization is facilitated, the equipment cost is low, and the economic benefit is good.
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Description

technical field

[0001] The invention belongs to the field of separation of ethyl acetate-ethanol systems, in particular to a method for separating ethyl acetate-ethanol mixture with a novel extractant. Background technique

[0002] Ethyl acetate is a colorless, low-toxic organic substance. As an important organic chemical raw material and industrial solvent, it is widely used in the production of ethyl fiber, synthetic rubber, artificial leather, adhesives, flavors and fragrances, etc. It is used as an extractant in the separation of pharmaceuticals and natural products. At present, the method for producing ethyl acetate is mainly the esterification of ethyl acetate, by adding excess ethanol to increase the yield of ethyl acetate, and excess ethanol can form an azeotrope with ethyl acetate under normal pressure, which is difficult to achieve by ordinary Ethyl acetate with higher purity can be obtained by rectification.

[0003] Chinese patent CN102942475A proposes a method...

Claims

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