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Method for separating isobutyl acetate, ethanol and water by azeotropic distillation

A technology of isobutyl acetate and isobutyl acetate ternary azeotrope, which is applied in the field of ethanol, water, and azeotropic distillation to separate isobutyl acetate, can solve the problem of increased loss of enterprises, waste of chemical raw materials, and increased operating costs and other issues to achieve the effect of reducing secondary investment, increasing yield, and improving economic benefits

Inactive Publication Date: 2009-04-22
烟台国邦化工机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In view of the above properties of isobutyl acetate and ethanol, the two materials are widely used in medicine, chemical industry and other fields. Many manufacturers usually use the recovered mixture of isobutyl acetate, ethanol and water as fuel or as waste liquid treatment. Waste of chemical raw materials, on the other hand, virtually increases the loss to the enterprise and increases the operating cost
However, ethanol is miscible with water and esters, and isobutyl acetate, ethanol, and water can form a ternary azeotrope, and ordinary rectification methods cannot obtain isobutyl acetate and ethanol with higher concentrations.

Method used

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  • Method for separating isobutyl acetate, ethanol and water by azeotropic distillation
  • Method for separating isobutyl acetate, ethanol and water by azeotropic distillation

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Embodiment 1

[0017] Embodiment 1, a kind of method of azeotropic rectification separation isobutyl acetate, ethanol, water is to adopt two-tower type continuous rectification process, is to feed the mixed solution of isobutyl acetate, ethanol, water from the middle part of the tower , the entrainer enters the upper part of the azeotropic distillation column, the mass ratio of the dose of the entrainer to the isobutyl acetate ternary azeotrope is 0.5~1.2:1, and the entrainer can be cyclohexane, n-hexane and benzene One of them, the present embodiment adopts cyclohexane, and the added entrainer forms a ternary azeotrope with ethanol and water in the azeotropic rectification tower, and the isobutyl acetate is extracted from the bottom of the azeotropic rectification tower The product, the ternary azeotrope enriched with entrainer, ethanol, and water at the top of the tower, is condensed and separated to form an oil phase and a water phase. The oil phase is used as the reflux liquid of the azeo...

Embodiment 2

[0020] Embodiment 2, a kind of azeotropic distillation separates the method for isobutyl acetate, ethanol, water, is to adopt two-tower type intermittent rectification process, is the ternary co-aeration of entrainer and isobutyl acetate, ethanol, water Boilers are added to the batch azeotropic rectification column together, wherein the mass ratio of isobutyl acetate, ethanol, water: entrainer is 0.5~1.6:1, entrainer can be cyclohexane, n-hexane and benzene One of them, cyclohexane is used in this embodiment, the condensate from the top of the tower is condensed by the condenser, the oil phase flows back into the tower as the reflux liquid of the intermittent azeotropic distillation tower, and the water phase material is extracted to the corresponding storage tank Inside, the isobutyl acetate product is extracted from the tower kettle, and the entrainer, ethanol, and water ternary azeotrope extracted from the top of the intermittent azeotropic distillation tower are pumped into...

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Abstract

The invention discloses a method for separating isobutyl acetate, ethanol and water by azeotropic rectification, which comprises the step of mixing ternary azeotrope of the isobutyl acetate, the ethanol and the water with entrainer in an azeotropic rectification tower to rectify by adopting a two-tower continuous rectification method or a two-tower intermittent rectification method, wherein the entrainer entrains the ethanol and the water to achieve ternary azeotrope separation and to separate an organic phase and a water phase in a phase splitter. The method has the characteristics of continuous operation for separating isobutyl acetate / ethanol / water mixture and intermittent operation for ternary mixture.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, in particular to a method for separating isobutyl acetate, ethanol and water through azeotropic distillation. Background technique [0002] Isobutyl acetate is a colorless liquid at normal temperature with a fruity smell. The boiling point at normal pressure is 118.0°C. Isobutyl acetate is miscible with various organic solvents such as alcohols, ethers, and hydrocarbons; ethanol is colorless and transparent at normal temperature Liquid, with a special aromatic smell, the boiling point at normal pressure is 78.32°C, ethanol is miscible with water, ether, chloroform, ester, hydrocarbon derivatives and other organic solvents. In view of the above properties of isobutyl acetate and ethanol, the two materials are widely used in medicine, chemical industry and other fields. Many manufacturers usually use the recovered mixture of isobutyl acetate, ethanol and water as fuel or as waste liquid trea...

Claims

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Application Information

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IPC IPC(8): C07C69/14C07C67/54C07C31/08C07C29/80
Inventor 迪建东张燕张春灵宋鹏牟树飞
Owner 烟台国邦化工机械科技有限公司
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