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Method for producing ethanol, acetone and butanol by permeabilization, vaporization, coupling and rectification of ABE (Acetone, Butanol and Ethanol) fermentation liquor

A technology of pervaporation and pervaporation membrane is applied in the field of pervaporation coupled rectification separation and purification, which can solve the problem of high energy consumption in the heating process

Active Publication Date: 2014-11-05
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this patent, the components on the pervaporation permeate side need to be condensed first and then enter the rectification tower for refining, and the energy consumption of the condensation of the pervaporation permeate side feed liquid and the heating process of the feed liquid in the rectification tower is still relatively high. high

Method used

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  • Method for producing ethanol, acetone and butanol by permeabilization, vaporization, coupling and rectification of ABE (Acetone, Butanol and Ethanol) fermentation liquor

Examples

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Embodiment 1

[0012] ABE fermentation, pervaporation coupled rectification with corn flour as fermentation substrate to produce acetone, butanol and ethanol; figure 1 The production steps are described in detail as follows.

[0013] Fermentation: This step is figure 1 It is carried out in the fermenter 1 shown; that is, the Clostridium acetobutylicum ABE1101 strain uses corn flour as a carbon source to perform anaerobic fermentation to obtain a fermented liquid containing acetone, butanol and ethanol. The fermentation step further includes two steps of medium preparation and inoculation. Preparation of culture medium: use corn flour as the fermentation substrate to prepare a natural culture medium, and the corn flour in the culture medium is 60g / L; transfer the prepared natural culture medium into a fermenter for high-temperature sterilization, and wait for the temperature in the fermenter to drop to 40 After ℃, sterile nitrogen gas was introduced to construct an oxygen-free environment. ...

Embodiment 2

[0021] The manner of the rectification part of this embodiment is different from that of embodiment 1, which is not shown in the drawings. The gas mixture containing acetone, butanol, ethanol, butyric acid and water obtained from the pervaporation permeation side is rectified and separated in the first rectification tower, and the mixture of acetone and ethanol obtained at the top of the tower enters the second rectification tower. The mixture of water, butanol and butyric acid is obtained at the bottom and enters the third rectification tower; acetone and ethanol are obtained respectively at the top and bottom of the second rectification tower; water is respectively obtained at the top and bottom of the third rectification tower and butyric acid, butanol is extracted from the side line in the middle of the tower.

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Abstract

The invention provides a method for producing bulk biologic chemicals: ethanol, acetone and butanol by permeabilization, vaporization, coupling and rectification of an ABE (Acetone, Butanol and Ethanol) fermentation liquor. The method comprises the steps of: step A, separating and condensing the ABE fermentation liquor containing ethanol, acetone, butanol and butyric acid through a permeabilization and vaporization film, and obtaining a gas mixture containing ethanol, acetone, butanol, butyric acid and water on the permeable side; and step B, enabling the gas mixture to enter a rectification device directly to be subjected to rectification and separation without condensation so as to obtain ethanol, acetone and butanol products. According to the method provided by the invention, the ABE mixture on the permeable side after permeabilization and vaporization is enabled to enter the rectifying tower directly in form of gas, therefore, the energy consumption of product in the production process is greatly reduced, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of pervaporation coupled rectification separation and purification, and in particular relates to a method for producing ethanol, acetone and butanol from ABE fermentation broth through pervaporation coupled rectification. Background technique [0002] Butanol, acetone and ethanol are all important organic chemical raw materials. Butanol is mainly used in the production of acrylate, methacrylate and n-butyl phthalate. It can also be used as a solvent for resins, paints and adhesives, as an extraction agent for oils, fragrances and pharmaceutical industries, and as a defoamer for beneficiation . In addition, studies have shown that butanol is also a highly efficient liquid biofuel, its properties are very close to hydrocarbons, it has good compatibility with gasoline, has high energy density and combustion value, low vapor pressure and corrosiveness, and is easy to delivery. Acetone is widely used in plasti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/08C07C31/12C07C29/80C07C29/78C07C49/08C07C45/82C07C45/78C07C53/124C07C51/42
Inventor 谭天伟李树峰秦培勇张涛蔡的
Owner BEIJING UNIV OF CHEM TECH