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A kind of preparation method and application of fe3o4 magnetic liquid composite colloidal liquid foam

A magnetic liquid, fe3o4 technology, applied in magnetic liquids, magnetic objects, separation methods, etc., can solve the problems of high operation difficulty, poor reproducibility of extraction effect, difficult to achieve, etc., to avoid the use of surfactants, facilitate separation and The effect of purification and avoiding system complication

Active Publication Date: 2019-03-19
常州锦溪环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a process is destined to be extremely difficult to operate continuously and large-scale
[0006] 2. In the PDSE operation, at least three surfactants need to be introduced. In the low-concentration solute extraction process, although the solute can be transferred to the latex particles quickly, the multi-surfactant system will cause serious damage to the subsequent product separation and purification. greater difficulty
Extraction of water-soluble target products in fat-soluble systems with water-based inverse emulsion CLA is difficult to achieve in most cases
[0008] 4. The preparation of CLA and CGA has a certain degree of difficulty. There are various parameters in the specific structure, performance and operation process, such as the type and amount of surfactant, the type and amount of solvent, and the strength of mechanical shear. Therefore, the reproducibility of its extraction effect is poor, which also causes certain difficulties for the engineering application of PDSE

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] a kind of Fe 3 o 4 Preparation method of magnetic liquid composite colloidal liquid foam, Fe 3 o 4 The magnetic liquid composite colloidal liquid foam includes a normal phase emulsion composite colloidal liquid foam and an inverse emulsion composite colloidal liquid foam;

[0053] Wherein the preparation steps of the normal phase emulsion composite colloidal liquid foam are as follows:

[0054] (1) Preparation of water-based Fe 3 o 4 magnetic fluid

[0055] Ferric sulfate and ferrous sulfate according to Fe 3+ and Fe 2+ The molar ratio is 2.5:1 and dissolved in deionized water after mixing to control Fe 3+ The concentration is 0.02mol / L, then add a surfactant or dispersant, wherein the mass ratio of the surfactant or dispersant to the iron salt solution is 2, slowly add dilute lye to the iron salt solution under stirring conditions , the concentration of the alkali is controlled at 0.01mol / L, the pH value of the solution is adjusted to 10, and the stirring is c...

Embodiment 2

[0083] a kind of Fe 3 o 4 The preparation method of magnetic liquid composite colloid liquid foam, described Fe 3 o 4 The magnetic liquid composite colloidal liquid foam includes a normal phase emulsion composite colloidal liquid foam and an inverse emulsion composite colloidal liquid foam;

[0084] Wherein the preparation steps of the normal phase emulsion composite colloidal liquid foam are as follows:

[0085] (1) Preparation of water-based Fe 3 o 4 magnetic fluid

[0086] Ferric chloride and ferrous chloride according to Fe 3+ and Fe 2+ The molar ratio is 1.8:1 and dissolved in deionized water after mixing to control Fe 3+ The concentration is 0.1mol / L, then add a surfactant or dispersant, wherein the mass ratio of the surfactant or dispersant to the iron salt solution is 3, slowly add dilute lye to the iron salt solution under stirring conditions , the concentration of the alkali is controlled at 0.02mol / L, the pH value of the solution is adjusted to 12, and the ...

Embodiment 3

[0100] a kind of Fe 3 o 4 The preparation method of magnetic liquid composite colloid liquid foam, described Fe 3 o 4 The magnetic liquid composite colloidal liquid foam includes a normal phase emulsion composite colloidal liquid foam and an inverse emulsion composite colloidal liquid foam;

[0101] Wherein the preparation steps of the normal phase emulsion composite colloidal liquid foam are as follows:

[0102] (1) Preparation of water-based Fe 3 o 4 magnetic fluid

[0103] Ferric sulfate and ferrous chloride according to Fe 3+ and Fe 2+ The molar ratio is 2:1 and then dissolved in deionized water to control Fe 3 + The concentration is 0.08mol / L, then add a surfactant or dispersant, wherein the mass ratio of the surfactant or dispersant to the iron salt solution is 2.5, slowly add dilute lye to the iron salt solution under stirring conditions , the concentration of the alkali is controlled at 0.015mol / L, the pH value of the solution is adjusted to 11, and the stirr...

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Abstract

The invention relates to a preparing method of a Fe3O4 magnetic liquid composite colloidal liquid bubble. The bubble comprises normal phase emulsion and inverse emulsion. Both the preparing method of the normal phase emulsion and the preparing method of the inverse emulsion comprise the steps of firstly preparing water-based Fe3O4 magnetic liquid and then preparing oil-based Fe3O4 magnetic liquid, wherein when the normal phase emulsion is prepared, the oil-based magnetic liquid is slowly and dropwise added to water in which a surfactant is dissolved, and when the inverse emulsion is prepared, the water-based magnetic liquid is slowly and dropwise added to an oily solvent in which the surfactant is dissolved. The preparing method of the Fe3O4 magnetic liquid composite colloidal liquid bubble is applied to a PDSE separation system. The preparing method of the Fe3O4 magnetic liquid composite colloidal liquid bubble has the advantages that a separation process is simplified, the use of multiple surfactants is avoided, the probability in conducting PDSE operation in a waterborne system and the probability in conducting PDSE operation in an oily system both exist, and the preparing method facilitates subsequent separation and purification of extraction solute.

Description

technical field [0001] The present invention relates to a kind of Fe 3 o 4 Preparation method and application of magnetic liquid composite colloidal liquid foam. Background technique [0002] Predispersed solvent extraction PDSE (predispersed solvent extraction) is an extraction process different from traditional liquid-liquid heterogeneous extraction. It is characterized by the introduction of colloidal liquid foam CLA (colloidial liquid aphrons) and colloidal gas foam CGA (colloidal gas aphrons), which has high efficiency for the extraction and separation of low-concentration target products. PDSE relies on the colloidal liquid foam CLA to pre-disperse the solvent, that is, the extraction phase. CLA has a structure similar to that of an oil-in-water emulsion, and its particle size is between 1 and 25 μm. Homogeneous liquid droplets, CLA has a larger specific surface area. At the same time, the pre-dispersed solvent extraction phase is more stably dispersed in the conti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D11/04H01F1/44
CPCB01D11/0419B01D11/0492H01F1/445
Inventor 顾卫元刘志刚刘佳
Owner 常州锦溪环境科技有限公司
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