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Multi-stage counter-current micro-extraction system

An extraction and countercurrent technology, applied in liquid solution solvent extraction, sustainable manufacturing/processing, climate sustainability, etc., can solve the problems of difficult process control, large equipment volume, large energy consumption, etc. High operating flexibility and high mass transfer efficiency

Inactive Publication Date: 2011-05-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to propose a multistage countercurrent microextraction system, which realizes the multistage countercurrent microextraction of two-phase fluid through a one-way valve and pulse feeding and discharging, so as to overcome the large energy consumption and low efficiency of traditional extraction equipment. The equipment is bulky and the process is not easy to control, etc., and at the same time broaden the application field of micro-extraction equipment

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] Using 30% TRPO kerosene as extractant, extract nitric acid in nitric acid aqueous solution. For four-stage countercurrent microextraction, when the oil phase flow rate is 1.3mL / min and the water phase flow rate is 1.1mL / min, the four-stage average extraction efficiency can reach 99%, and the nitric acid solution flux can reach 66mL / h.

Embodiment 2

[0025] Using 30% TRPO kerosene as extractant, extract nitric acid in nitric acid aqueous solution. For the four-stage countercurrent microextraction, when the flow rate of the oil phase is 4.0mL / min and the flow rate of the water phase is 3.0mL / min, the average extraction efficiency of the four stages can reach 95%, and the flux of nitric acid solution can reach 180mL / h.

Embodiment 3

[0027] Using 30% TRPO kerosene as extractant, extract nitric acid in nitric acid aqueous solution. For three-stage countercurrent microextraction, when the oil phase flow rate is 1.8mL / min and the water phase flow rate is 1.5mL / min, the three-stage average extraction efficiency can reach 98%, and the nitric acid solution flux can reach 90mL / h.

[0028] From the above examples, it can be shown that the present invention has the characteristics of good fluid countercurrent effect, high extraction efficiency, large operating flexibility, low energy consumption and large processing capacity, low equipment processing cost, compact structure, and small occupied space; it is especially suitable for chemical and chemical extraction Separate domain applications.

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Abstract

The invention relates to a multi-stage counter-current micro-extraction system, belonging to the fields of chemical extraction and separation field. The multi-stage counter-current micro-extraction system comprises a counter-current micro-extraction group and a pulse feeding and discharging system; the counter-current micro-extraction group is formed by connecting more than two levels of micro-extraction units, wherein the light-phase material liquid outlet of a preceding-level micro-extraction unit is connected with the light-phase material liquid inlet of a next-level micro-extraction unit, and the heavy-phase material liquid outlet of the next-level micro-extraction unit is connected with the heavy-phase material liquid inlet of the preceding-level micro-extraction unit; the pulse feeding and discharging system comprises a two-way four-cylinder reciprocating pump and four buffer rooms, wherein the outlets of four cylinders of the two-way four-cylinder reciprocating pump are respectively connected with the four buffer rooms; and the material liquid enters in the light-phase material liquid inlet and the heavy-phase material liquid inlet of the micro-extraction unit on each level alternatively. The multi-stage counter-current micro-extraction system has high extraction efficiency, low energy consumption and compact structure, is convenient to manufacture and has an important application prospect in many fields of chemical industry, petrochemistry, medicine, food and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical reaction and separation equipment, in particular to a multi-stage countercurrent high-performance micro-extraction system for rapid mixing, mass transfer and reaction of fluids in chemical process. Background technique [0002] In many fields such as chemistry, chemical industry, petrochemical, medicine and food, especially the reaction and separation process of chemical industry, the extraction process has very important significance. Traditional extraction equipment, such as mixing and settling tanks and extraction towers, generally have disadvantages such as high energy consumption, low efficiency, large equipment volume, and difficult process control. In recent years, with the rapid development of mechanical processing and electronic control technology, new liquid-liquid dispersion and mass transfer separation technologies have emerged and developed rapidly, and micro-extraction equipment is ...

Claims

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Application Information

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IPC IPC(8): B01D11/04
CPCY02P20/10
Inventor 李少伟骆广生陈靖王建晨
Owner TSINGHUA UNIV
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