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Separating and purifying method of butyl alcohol, acetone and total ethanol dissolvent in corn fermentation mash and device thereof

A technology for fermentation mash and total solvent, applied in the separation/purification of hydroxyl compounds, separation/purification of carbonyl compounds, chemical instruments and methods, etc., can solve the problems of low mass transfer separation efficiency and high energy consumption

Active Publication Date: 2009-10-07
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The total solvent butanol, acetone, and ethanol are important basic organic chemical raw materials. With the rise of crude oil prices, in recent years, the method of using starch fermentation to prepare the total solvent has been re-researched and put into industrial production. In terms of purification, rectification has always been the main method of separation and purification. The existing rectification separation part is mainly plate tower, which has low mass transfer separation efficiency and high energy consumption.

Method used

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  • Separating and purifying method of butyl alcohol, acetone and total ethanol dissolvent in corn fermentation mash and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030](a) prepare mature mash, the composition of described mature mash is 97.9% water, 1.2% butanol, 0.6% acetone, 0.2% ethanol, and the balance is impurity, and impurity comprises methyl alcohol, acetic acid, butyric acid, isoamyl alcohol, etc.; (b) divide the mature mash into two streams at a flow rate of 250kg / h and 350kg / h respectively, and pump the material with a small flow rate into the middle part of the crude mash rectification tower A after being preheated to a temperature of 68°C After the preheating temperature of the material with a large flow rate reaches 95°C, it is pumped into the middle of the crude mash rectification B tower, and after a dehydration, the total solvent mass percentage is extracted from the top of the crude mash rectification A tower and B tower respectively Concentration is controlled at 45% of the material, and part of the material extracted from the top of the crude mash rectification A tower is sent to the upper section of the butanol recti...

Embodiment 2

[0033](a) prepare mature mash, the composition of described mature mash is 97.9% water, 1.2% butanol, 0.6% acetone, 0.2% ethanol, and the balance is impurity, and impurity comprises methyl alcohol, acetic acid, butyric acid, isoamyl alcohol, etc.; (b) divide the mature mash into two streams at a flow rate of 300kg / h and 420kg / h respectively, and pump the material with a small flow rate into the middle part of the crude mash rectification A tower after the preheating temperature reaches 70°C After the preheating temperature of the material with a large flow rate reaches 97°C, it is pumped into the middle of the crude mash rectification B tower, and after a dehydration, the total solvent mass percentage is extracted from the top of the crude mash rectification A tower and B tower respectively Concentration is controlled at 50% of the material, the material extracted from the top of the crude mash rectification A tower is partly sent to the upper section of the butanol rectificati...

Embodiment 3

[0036](a) prepare mature mash, the composition of described mature mash is 97.9% water, 1.2% butanol, 0.6% acetone, 0.2% ethanol, and the balance is impurity, and impurity comprises methyl alcohol, acetic acid, butyric acid, isoamyl alcohol, etc.; (b) divide the mature mash into two streams at a flow rate of 350kg / h and 490kg / h respectively, and pump the material with a small flow rate into the middle part of the crude mash rectification tower A after being preheated to a temperature of 72°C After the preheating temperature of the material with a large flow rate reaches 99°C, it is pumped into the middle of the crude mash rectification B tower, and after a dehydration, the total solvent mass percentage is extracted from the top of the crude mash rectification A tower and B tower respectively Concentration is controlled at 55% of the material, and the material extracted from the top of the crude mash rectification A tower is partly sent to the upper section of the butanol rectif...

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Abstract

The present invention discloses a separating and purifying method of butyl alcohol, acetone and ethanol dissolvent in corn fermentation mash. The corn mash is added into crude mash rectifying towers A and B. The material collected from the rectifying towers A and B is sent to a butyl alcohol rectifying tower 1. The second liquid part and third liquid part collected from the rectifying tower 1 is sent to an acetone rectifying tower. The material is collected from the rectifying tower 1 and is sent to the rectifying tower 2 purifying. The butyl alcohol product collected from the rectifying tower 2 and the liquid-phase material collected from the tower top of acetone rectifying tower is sent to an aldehyde eliminating rectifying tower. The material collected from the tower base is sent to an ethanol rectifying tower. The liquid-phase material collected from the tower top of eldehyde eliminating rectifying tower is sent to the acetone rectifying tower. The acetone product is collected from the aldehyde eliminating rectifying tower. The collected material of eldehyde eliminating rectifying tower is sent to the eldehyde eliminating rectifying tower. One part of material collected from the tower top of ethanol rectifying tower is sent to the lower segment of acetone rectifying tower. The light component is recycled in a light component recycling storage tank. The method of the invention increases the separation efficiency and reduces the energy consumption.

Description

technical field [0001] The invention relates to a method and a device for separating and purifying the total solvent of butanol, acetone and ethanol in corn fermented mash. Background technique [0002] In recent years, the increasing scarcity of petroleum resources has made countries all over the world attach great importance to the development of renewable energy and compete to develop it. Since the 1980s, my country has considered using renewable materials to produce energy products to deal with the energy crisis. The first domestic ethylene / ethylene oxide combined plant using corn as raw material was officially approved in 1985 and started construction in 1992. The total solvent butanol, acetone, and ethanol are important basic organic chemical raw materials. With the rise of crude oil prices, in recent years, the method of using starch fermentation to prepare the total solvent has been re-researched and put into industrial production. In terms of purification, rectific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/12C07C49/08C07C31/08C07C29/80C07C29/74C07C45/82C07C45/78
Inventor 冯惠生王强
Owner TIANJIN UNIV
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