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Method for treating itaconic acid fermentation mother liquor through multistage extraction and steam stripping coupling

A technology of itaconic acid and mother liquor, applied in the separation/purification of carboxylic acid compounds, organic chemistry, etc., can solve the problems of low removal rate, waste of resources, high energy consumption of separation and treatment of itaconic acid fermenting yeast liquid technology, and achieve a solution Higher cost, promoting the effect of promotion and application

Inactive Publication Date: 2020-10-23
QINGDAO UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Chinese patent CN101085734 discloses a method for purifying itaconic acid fermentation liquid or further extracting itaconic acid from itaconic acid mother liquor by using equipment such as nanofiltration membrane, ultrafiltration membrane or microfiltration membrane. Good quality, low operating cost, simple and efficient operation, etc., suitable for industrial production, but this method consumes a lot of energy
[0007] The existing technology for purification and treatment of itaconic sour yeast liquid has problems such as waste of resources and low removal rate, and the technology of separation and treatment of itaconic acid fermented yeast liquid has problems such as high energy consumption

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  • Method for treating itaconic acid fermentation mother liquor through multistage extraction and steam stripping coupling

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Effect test

Embodiment 1

[0028] Feed flow rate is 100kg / h, contains itaconic acid 7%, water 93% (mass fraction) in the feed, the operating pressure of extraction kettle (V1), extraction kettle (V2), extraction kettle (V3) is 0.01atm, The itaconic acid and water mixture enters from the top of the extraction kettle (V1), extraction kettle (V2), and extraction kettle (V3), and the extractant enters from the top of the extraction kettle (V1), extraction kettle (V2), and extraction kettle (V3). Enter, extraction agent is ethyl acetate, and flow rate is 100kg / h (the feed flow mass ratio of extraction agent and phenol-water mixture is 1), extraction kettle (V1), extraction kettle (V2), extraction kettle (V3) The temperature is 30°C. The theoretical plate number of the stripping column (T) is 20, the purity of the itaconic acid after separation is 99.9%, and the yield is 95.1%.

Embodiment 2

[0030] Feed flow rate is 100kg / h, contains itaconic acid 8%, water 92% (mass fraction) in the feed, the operating pressure of extraction kettle (V1), extraction kettle (V2), extraction kettle (V3) is 0.015atm, The itaconic acid and water mixture enters from the top of the extraction kettle (V1), extraction kettle (V2), and extraction kettle (V3), and the extractant enters from the top of the extraction kettle (V1), extraction kettle (V2), and extraction kettle (V3). Enter, extraction agent is ethyl acetate, and flow rate is 200kg / h (the feed flow mass ratio of extraction agent and phenol-water mixture is 2), extraction kettle (V1), extraction kettle (V2), extraction kettle (V3) The temperature is 30°C. The theoretical plate number of the stripping column (T) is 15, the purity of the itaconic acid after separation is 99.96%, and the yield is 95.0%.

Embodiment 3

[0032] Feed flow rate is 100kg / h, contains itaconic acid 9%, water 91% (mass fraction) in the feed, the operating pressure of extraction kettle (V1), extraction kettle (V2), extraction kettle (V3) is 0.02atm, The itaconic acid and water mixture enters from the top of the extraction kettle (V1), extraction kettle (V2), and extraction kettle (V3), and the extractant enters from the top of the extraction kettle (V1), extraction kettle (V2), and extraction kettle (V3). Enter, extraction agent is ethyl acetate, and flow rate is 300kg / h (the feed flow mass ratio of extraction agent and phenol-water mixture is 3), extraction kettle (V1), extraction kettle (V2), extraction kettle (V3) The temperature is 30°C. The theoretical plate number of the stripping tower (T) is 10, the purity of the itaconic acid after separation is 99.98%, and the yield is 95.1%.

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Abstract

The invention relates to a method for treating itaconic acid fermentation mother liquor through multistage extraction and steam stripping coupling and a device suitable for the method. According to the method, ethyl acetate is used as an extracting agent; the itaconic acid fermentation mother liquor firstly enters an extraction kettle to be extracted and separated; part of the mixture of the extractant and the itaconic acid fermentation mother liquor enters a next-stage extraction kettle to be sequentially and circularly extracted and separated; an extraction phase enters the stripping tower through the extraction phase storage tank, a raffinate phase enters the raffinate ester recovery kettle through the extraction phase storage tank, a top material flow enters the bottom of the strippingtower, a high-purity itaconic acid-containing saturated solution is obtained at the bottom after stripping, a bottom material flow is circulated back to the stripping tower, a top material flow enters the layering device after being condensed by the condenser, and an extraction agent is obtained for recycling. The method has the advantages of low energy consumption, simple process, high purity ofthe separated itaconic acid and the like, the adopted extracting agent ethyl acetate is easy to recover, the chemical thermal stability is good, and the loss of the extracting agent is reduced.

Description

【Technical field】 [0001] The invention belongs to the field of separation and purification of chemical industry, and specifically relates to a method for multi-stage extraction and steam stripping coupling treatment of itaconic acid fermented yeast liquor. The method for extracting and purifying itaconic sour yeast liquid by steam stripping tower. 【Background technique】 [0002] Itaconic acid, also known as methylene succinic acid, is a chemical intermediate with broad application prospects. The total annual demand for itaconic acid in the world is about 1.5 million tons. At present, the methods of industrial production of itaconic acid include chemical synthesis and fermentation. Since the fermentation method mainly uses biomass energy such as straw as raw materials, it avoids the use of fossil energy and has the advantages of energy security and environmental protection. Itaconic acid is produced by fermentation. In the fermentation method, the recrystallization method i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C57/13C07C51/42C07C51/48C07C51/44
CPCC07C51/42C07C51/48C07C51/44C07C57/13
Inventor 王英龙张红如朱兆友崔培哲齐建光李鑫
Owner QINGDAO UNIV OF SCI & TECH