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Super-pure ethanol refining process

An ethanol and ultra-pure technology, which is applied in the preparation of hydroxyl compounds, organic compounds, organic chemistry, etc., can solve the problems of high cost of ultra-pure ethanol rectification, a large number of equipment, and lengthy production processes, etc., to improve the separation ability and The reliability of equipment, the simplicity of process flow, the effect of reducing operating costs and production costs

Inactive Publication Date: 2003-05-14
TIANJIN UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

The traditional ultra-pure ethanol refining and impurity removal process is restricted by rectification technology and equipment level, and the production process is lengthy. The same impurity removal process requires the same functional equipment to be completed multiple times. The traditional ultra-pure ethanol impurity removal process requires at least two The above-mentioned overall removal of impurities such as de-aldehyde, de-ester and de-methanol requires a large number of equipment, and the cost of ultra-pure ethanol distillation is high.

Method used

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Embodiment

[0014] As shown in the figure, the ultra-pure ethanol refining process is mainly composed of 1-crude distillation tower, 2-dealdehyde tower, 3-refining tower, 4-demethanol tower and 5-recovery tower unit equipment.

[0015] (1) The raw material liquid with an ethanol content of 5-30% enters the crude distillation tower 1. After vapor-liquid mass transfer separation, the waste liquid is discharged from the tower kettle and sent to the outside of the device area for treatment. The ethanol liquid extracted from the top of the tower is sent to the dealdehyde tower 2. The decompression operation pressure of the tower is -0.02~0.08MPa. The main task of the crude distillation tower is to remove most of the water, organic acid and heavy component impurities brought along with the fermentation mash.

[0016] (2) The 30-80% ethanol liquid extracted from the top of the crude distillation tower and the stream from the refining tower kettle are sent to the dealdehyde tower 2, and impuritie...

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Abstract

In the super-purily ethanol refining process, the production equipment includes primary distillation column, aldehyde eliminating tower, rectifying tower, methanol eliminating tower and recovery tower. From the raw material liquid produced through biological process or chemical process and with ethanol content of 5-30 % the super-pure ethanol is prepared. It is characterized by the composite plate tower-stuffing tower structure of both aldehyde eliminating tower and rectifying tower, the first elimination of esters, aldehydes, fusel oil and other impurities, and the second elimination of impurities in the rectifying tower. The present invention has the advantages of simple process flow, low cost, etc.

Description

technical field [0001] The invention relates to an ultra-pure ethanol refining process, in particular to the ultra-pure ethanol refining process using biomass and chemically prepared raw material liquid with an ethanol content of 5-30% as a raw material, which belongs to the ultra-pure ethanol production technology. Background technique [0002] The raw material for ethanol production is biomass and raw material liquid with ethanol content of 5-30% obtained by chemical method, which contains not only water and ethanol, but also impurities such as organic acids, methanol, esters, aldehydes and higher alcohols. It is usually refined by rectification to remove most of the impurities such as water, organic acids, methanol, esters, aldehydes and higher alcohols in the raw material liquid. The current new standard for ethanol products is GB10343-2000, and the original GB10343-89 standard was abolished on September 1, 2002. The original GB10343-89...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/80C07C31/08
Inventor 张敏华吕惠生董秀芹刘成刘宗章李永辉张志强钱胜华
Owner TIANJIN UNIV
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