Method for evaporation separation of liquid state mixture based on porous composite

A porous composite material and separation method technology, applied in the application field of composite materials, can solve the problems of inability to overcome the separation of solution azeotropes, inability to control solution evaporation, and low energy utilization, and achieve mature and improved preparation and surface treatment technologies. The effect of photothermal conversion efficiency and improving utilization efficiency

Active Publication Date: 2015-09-30
SHANGHAI JIAO TONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

The reason is that the existing evaporation technology cannot regulate the evaporation of each component of the solution, nor can it overcome the azeotropy of the solution to achieve the separation of the azeotrope
Moreover, the traditional fractionation method needs to heat the entire system to a relatively high temperature, resulting in large heat loss and extremely low energy utilization.

Method used

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  • Method for evaporation separation of liquid state mixture based on porous composite
  • Method for evaporation separation of liquid state mixture based on porous composite
  • Method for evaporation separation of liquid state mixture based on porous composite

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Preparation of gold nanoparticles

[0029] A certain concentration of chloroauric acid (HAuCl 4 ) solution is added to boiling deionized water in a certain proportion, and immediately after stirring evenly, a certain concentration of trisodium citrate solution is added in proportion, then after stirring for 20 minutes under heating conditions, the heat source is removed, and stirring is continued for 15 minutes. Gold nanoparticles with a diameter of 10 nm were obtained. The obtained solution is used as a seed for growth of gold particles, the seed solution is diluted and a certain proportion of hydroxylamine hydrochloride solution and chloroauric acid solution are added to make the particle size of the gold nanoparticles grow, and the growth steps are repeated to make the particle size of the gold particles from 10nm to 10nm. Gradually grow about 100nm. The obtained solutions were combined and allowed to stand for a period of time for the solution to settle the pa...

Embodiment 2

[0037] (1) Preparation of gold nanoparticles: same as in Example 1, but only 10 nm particles need to be prepared.

[0038] (2) Preparation of paper-based composite membrane: use the particle solution obtained in (1), dilute the original solution 3 times, take 30ml of the diluted solution in a beaker, and spread a dust-free paper under the beaker, and place it in an atmosphere with formic acid Stand in a desiccator. After about 12 hours, the clear liquid below the liquid surface was removed, so that the surface self-assembled particle film was deposited on the dust-free paper; then the composite film was taken out and dried.

[0039] (3) The modification of the paper-based composite membrane is the same as in Example 1.

[0040] (4) The evaporation conditions of the paper-based composite film are the same as those in Example 1, only the evaporation efficiency is slightly different.

Embodiment 3

[0042] The composite membrane was modified with dodecanethiol instead; the other modification methods were the same as in Example 1, and the evaporation process was the same as in Example 1.

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Abstract

The invention relates to a method for evaporation separation of a liquid state mixture based on a porous composite. The method comprises the following steps: (1) adopting a porous solid material as a base body, and compounding electromagnetic wave absorbing particles with the electromagnetic wave absorbing property onto the base body to obtain a porous photo-thermal conversion composite; (2) placing the porous photo-thermal conversion composite on the interface of air and the liquid state mixture, and enabling the liquid state mixture to vaporize quickly to realize efficient evaporation; (3) adjusting the surface geometric structure and chemical property of the porous photo-thermal conversion composite so as to control evaporation capacity of components in the evaporation process of the liquid state mixture to realize evaporation separation of the liquid state mixture. Compared with the prior art, the electromagnetic wave absorbing particles are utilized to efficiently convert light energy into heat to heat and vaporize the liquid state mixture on the surface layer, and are compounded with a porous supporting material of which the surface structure property is controllable to control the evaporation rate of different components, so as to realize evaporation separation of the liquid state mixture.

Description

technical field [0001] The invention relates to a method for separating a liquid mixture, in particular to a method for evaporating and separating a liquid mixture based on a porous composite material, and belongs to the technical field of application of composite materials. Background technique [0002] Evaporation plays a very important role in chemical fractionation. Chemical fractionation often needs to suppress the evaporation of some components and strengthen the evaporation of other components, but the ability to separate and purify by evaporation is relatively limited. The reason is that the existing evaporation technology cannot regulate the evaporation of each component of the solution, nor can it overcome the azeotropy of the solution to separate the azeotrope. Moreover, the traditional fractionation method needs to heat the entire system to a relatively high temperature, resulting in large heat loss and extremely low energy utilization. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D1/00B01J19/12
Inventor 俞圣韬张尧段浩泽刘颜铭尚文陶鹏邬剑波宋成轶邓涛
Owner SHANGHAI JIAO TONG UNIV
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