High performance liquid-solution solvent extraction method and device

An extraction and high-efficiency technology, applied in the direction of liquid solution solvent extraction, etc., can solve the problems of high cost and unsatisfactory extraction effect

Inactive Publication Date: 2010-02-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The primary technical problem to be solved by the present invention is to provide a new method for liquid-liquid solvent extraction in view of the prior art, to overcome the

Method used

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  • High performance liquid-solution solvent extraction method and device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] use figure 1 The shown technological process carries out extraction, specifically as follows:

[0043] 1. Material properties

[0044] (1) Extracted material: the content of caprolactam is 50-60%, the rest is water, and the density of the mixture is 1028kg / m 3 ;

[0045] (2) Extractant: benzene, density is 872kg / m 3 ;

[0046] 2. Determination of caprolactam content

[0047] Caprolactam content is determined by gas chromatography, referring to DSM385-E and 385-02-E and DSM657-E;

[0048] 3. Application effect

[0049] The volume flow ratio of the extracted material and the extractant is 1:6, the content of caprolactam in the extracted material imported from the tower extraction equipment is 50-60%, and the content of caprolactam in the raffinate outlet of the tower extraction equipment is 2-4% , after being extracted by centrifugal extraction equipment, the caprolactam content of the raffinate drops below 1%, which obviously improves the extraction effect.

Embodiment 2

[0051] use figure 2 The shown technological process carries out extraction, specifically as follows:

[0052] 1. Material properties

[0053] (1) Extracted material: the content of caprolactam is 50-60%, the rest is water, and the density of the mixture is 1028kg / m 3 ;

[0054] (2) Extractant: benzene, density is 872kg / m 3 ;

[0055] 2. Determination of caprolactam content

[0056] Caprolactam content is determined by gas chromatography, referring to DSM385-E, 385-02-E and DSM657-E;

[0057] 3. Application effect

[0058] The volume flow ratio of the extracted material and the extractant is 1:6, the content of caprolactam in the extracted material imported from the tower extraction equipment is 50-60%, and the content of caprolactam in the raffinate outlet of the tower extraction equipment is 2-4% , and then extracted by two-stage centrifugal extraction equipment, the caprolactam content of the raffinate drops below 0.3%, which obviously realizes deep extraction.

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Abstract

The invention relates to a high performance liquid-solution solvent extraction method and a device, providing a high performance liquid-solution solvent extraction method comprising: extracting an extracted material in a tower type to obtain extract liquor and raffinate; and performing centrifugal extraction to the obtained raffinate to obtain an extraction product. The invention also provides a high performance liquid-solution solvent extraction device.

Description

technical field [0001] The invention relates to a high-efficiency liquid-liquid solvent extraction method, in particular to a new method for liquid-liquid solvent extraction using the series combination of extraction towers and centrifugal extraction techniques. The invention also relates to the apparatus used in the method. Background technique [0002] Solvent extraction is an important mass transfer unit operation, and its basic principle is to realize the separation or purification of solutes in liquid mixtures by distributing different properties of solutes between two immiscible (or partially miscible) liquid phases. Solvent extraction is usually carried out at room temperature or at a lower temperature. It has the characteristics of low energy consumption and is more suitable for the separation of heat-sensitive substances. It can realize countercurrent operation with better economic benefits and is conducive to continuous large-scale production. Its scope of applica...

Claims

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Application Information

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IPC IPC(8): B01D11/04
Inventor 白志山韩婕刘毅冯英丽汪华林
Owner EAST CHINA UNIV OF SCI & TECH
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