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Method for extracting polyol in fermentation liquor by supercritical microemulsion/reverse micelle membrane separation

A technology of membrane separation and reverse micelles, which is applied in the fields of bioengineering, chemical engineering, and energy, can solve the problems of high energy consumption, high cost, and complicated process, and achieve the effect of reducing production cost, reducing energy consumption, and simple process flow

Inactive Publication Date: 2012-05-16
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new method for separating polyols from fermentation broth, aiming at the problems of high cost, small separation capacity, large energy consumption and complicated process in the subsequent separation and purification of polyols produced by fermentation.

Method used

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  • Method for extracting polyol in fermentation liquor by supercritical microemulsion/reverse micelle membrane separation
  • Method for extracting polyol in fermentation liquor by supercritical microemulsion/reverse micelle membrane separation

Examples

Experimental program
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Effect test

Embodiment 1

[0011] Take 1L of 1,3-propanediol fermentation broth, remove the bacteria by ultrafiltration, get the supernatant and send it to the extractor, add sodium succinic acid diester sulfonate AOT and ethanol, turn on the magnetic stirrer, connect it to the pressure system, and put the carbon dioxide cylinder Open, inject high-pressure carbon dioxide into the system to a pressure of 8MPa, and the temperature of the constant temperature water bath is 35°C, forming a supercritical state in the extractor. When the solution is uniform and transparent through the window, open the valve and let the feed liquid flow through the hollow fiber membrane contactor for membrane separation. The permeate and retentate are collected separately into the sampling system. Sampling is carried out to detect the retentate, and when the obtained retentate does not contain 1,3-propanediol, close the valve and stop the extraction. Obtain carbon dioxide permeation flux of 125kg / h / m 2 / MPa; 1,3-propanediol ...

Embodiment 2

[0013] Take 1L of the 1,2-propanediol fermentation broth, centrifuge to remove the bacteria, and get the supernatant and send it to the extractor. Add polyoxyethylene alkylphenyl ether TritonX-100, turn on the magnetic stirring, connect to the pressure system, open the carbon dioxide cylinder, inject high-pressure carbon dioxide into the system to a pressure of 16MPa, and the temperature of the constant temperature water bath is 46°C to form a supercritical state in the extractor. state. When the solution is uniform and transparent through the window, open the valve and let the feed liquid flow through the hollow fiber membrane contactor for membrane separation. The permeate and retentate are collected separately into the sampling system. Sampling is carried out to detect the retentate, and when the obtained retentate does not contain 1,2-propanediol, close the valve and stop the extraction. Obtain carbon dioxide permeation flux of 121kg / h / m 2 / MPa; 1,2-propanediol rejectio...

Embodiment 3

[0015] Take 1L of the glycerol fermentation broth, remove the bacteria by ultrafiltration, obtain the supernatant and send it to the extractor. Add perfluoropolyether ammonium carbonate, turn on the magnetic stirring, connect to the pressure system, open the carbon dioxide cylinder, inject high-pressure carbon dioxide into the system to pressurize to 25MPa, and the temperature of the constant temperature water bath is 70°C. The supercritical state is formed in the extractor and passed into the extractor. When the solution is uniform and transparent through the window, open the valve and let the feed liquid flow through the hollow fiber membrane contactor for membrane separation. The permeate and retentate are collected separately into the sampling system. Sampling is carried out to detect the retentate, and when the obtained retentate does not contain glycerol, close the valve and stop the extraction. Obtain carbon dioxide permeation flux of 118kg / h / m 2 / MPa; Glycerol reject...

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Abstract

The invention discloses a method for membrane separating and extracting polyol from fermentation liquor by using an supercritical micro-emulsified / reverse micelle, which belongs to the technical field of energy, bioengineering and chemical engineering, and relates to the technology and the method for separating and extracting low carbon polyol such as 1,3-propanediol, 1,2-propanrdiol, 1,4-butanediol, glycerol, and the like, from microorganism fermentation liquor. The invention is characterized in that bacteria is removed from the fermentation liquor by ultrafiltration or centrifugation at first, then supernatant is obtained; a surfactant is added, and CO2 is used for pressurizing until the supercritical state is achieved; a valve is opened when the solution is even observed from a window or after the solution is stirred for a certain period of time, and feed liquor flows through a membrane module so that membrane separation can be carried out; finally, permeation liquid and retention are collected to a sampling system respectively; CO2 with high pressure returns to a pressurizing system for recycling and reusing after separation. The effect and the benefit of the invention are that traditional rectification process is replaced by the supercritical technology, and the supercritical CO2 is used in polar substance extraction and coupled with membrane separation technology so thatthe CO2 with high pressure can be recycled, thereby reducing energy consumption.

Description

technical field [0001] The invention belongs to the technical fields of energy, bioengineering and chemical engineering, and relates to the separation technology of microbial fermentation liquid, in particular to the separation of 1,3-propanediol, 1,2-propanediol, 1,4-butanediol and glycerol from microbial fermentation liquid Alcohol and other low-carbon polyols. Background technique [0002] Low-carbon polyols (carbon number <5) such as 1,3-propanediol, 1,2-propanediol, 1,4-butanediol, glycerol, etc. are important chemical raw materials, mainly used in the production of polyterephthalene Propylene glycol formate (PPT), engineering thermoplastics, epoxy and polyester resins, etc. Propylene glycol is also the main component of hydraulic fluid and brake fluid, and can also be used as a fat-free water-soluble lubricant for textile packaging machinery, a plasticizer in the paper industry, and a dissolving aid in cement and lime processing. In addition, in the pharmaceutical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/74C07C29/86C07C31/18C12P7/18
CPCY02P20/54
Inventor 银建中周丹徐琴琴肖敏王伟彬刘东学
Owner DALIAN UNIV OF TECH