Double-side magnetically responsive particles, and preparation method and applications thereof

A magnetic response, two-sided technology, applied in the direction of dehydration/demulsification by chemical methods, separation of immiscible liquids, etc. The effect of interface activity, cost saving of pharmaceuticals, and low energy consumption

Active Publication Date: 2019-08-09
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a double-sided magnetic response particle and its preparation method, aiming to solve the problems of poor demulsification effect, non-reusable use and low application range of existing demulsifiers

Method used

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  • Double-side magnetically responsive particles, and preparation method and applications thereof
  • Double-side magnetically responsive particles, and preparation method and applications thereof
  • Double-side magnetically responsive particles, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 1. Preparation of magnetic iron ferric oxide nanoparticles: Dissolve 8.6 g of ferric chloride hexahydrate and 2 g of trisodium citrate in 20 mL of water, add 140 mL of ethylene glycol, and stir in a water bath at 60°C for 15 minutes until the solution is clear and transparent Add 8 g of anhydrous sodium acetate, stir for 10 min, transfer to a 200 mL polytetrafluoroethylene liner, conduct hydrothermal reaction at 200 °C for 10 h, wash with distilled water and ethanol three times in turn after cooling, and vacuum dry at 60 °C for 10 h. Magnetic ferric oxide nanoparticles were prepared.

[0058] 2. Surface chemical masking of magnetic particles: Take 2 g of ferric oxide nanoparticles and disperse them in 400 mL of water, and mix them with 50 g of potato starch particles. After mechanical stirring for 24 h, wait for sedimentation and remove the supernatant, add 400 ml of ethanol, and wash 4 times like this.

[0059] 3. Hydrophobic modification of the surface of magnetic pa...

Embodiment 2

[0062] 1. Preparation of magnetic iron ferric oxide nanoparticles: Dissolve 13.9 g of ferrous sulfate heptahydrate and 32.44 g of ferric chloride hexahydrate in a mixed solvent of 100 mL of water and 400 mL of ethylene glycol, and add them to a three-necked flask In the nitrogen atmosphere, the precipitating agent ammonia water was added to adjust the pH to >10, and the reaction was stirred at a constant speed in a water bath at 50°C for 3 h. After the black ferric oxide nanoparticles were formed, they were collected by centrifugation, washed and dried with water and ethanol for 3 times in sequence. , and finally dried in a vacuum drying oven at 60° C. to obtain magnetic Fe3O4 nanoparticles.

[0063] 2. Chemical masking of the surface of magnetic particles: 0.5 g of ferric oxide nanoparticles prepared were dispersed into 400 mL of ethanol, and 50 g of silicon dioxide particles were mixed in at the same time. After mechanical stirring for 3 h, centrifuge at low speed and remove...

Embodiment 3

[0067] 1. Preparation of magnetic iron ferric oxide nanoparticles: Dissolve 13.9g of ferrous sulfate heptahydrate and 32.44g of ferric chloride hexahydrate in a mixed solvent of 100mL of water and 400mL of ethylene glycol, and add them to a three-necked flask. The precipitant ammonia water added in the nitrogen atmosphere was adjusted to pH > 10, and the reaction was stirred at a constant speed in a water bath at 50°C for 3 hours. After the formation of black iron ferric oxide nanoparticles, they were collected by centrifugation, washed and dried with water and ethanol for 3 times, and finally placed in Drying in a vacuum oven at 60°C to obtain magnetic ferric oxide nanoparticles was prepared.

[0068] 2. Chemical masking of the surface of magnetic particles: take 0.5 g of ferric oxide nanoparticles prepared and disperse them into 400 mL of water, mix 32 g of kaolin powder, 0.05 g of NaCl, and 0.01 g of KCl at the same time, adjust the pH to 8.2, and stir mechanically After 3 ...

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Abstract

The invention discloses double-side magnetically responsive particles, and a preparation method and applications thereof. The preparation method comprises following steps: a chemical covering compoundextremely high in surface area and rich in surface hydroxyl groups is adopted for mixing with magnetic nanometer particles containing surface hydroxyl groups for formation of hydrogen bond interaction, so that the reaction performance of a part of hydroxyl function groups on the surfaces of the magnetic nanometer particles is shielded; and then, the left hydroxyl groups without hydrogen bond interaction are subjected to hydrophobic modification so as to achieve the different hydrophilic and hydrophobic characteristics on the two sides of the magnetic nanometer particles. The obtained double-side magnetically responsive particles possess extremely high interface activity, are capable of moving to the oil water interfaces in oil-in-water or water-in-oil systems, so that microemulsion surface magnetization is realized, and in addition, microemulsion movement mode can be changed using an applied magnetic field, and rapid aggregation and polymerization are realized; and the double-side magnetically responsive particles can be recycled.

Description

technical field [0001] The invention relates to the field of demulsifiers, in particular to a double-sided magnetic response particle and a preparation method and application thereof. Background technique [0002] In the existing petroleum industry, the production of stable oil-water emulsions is basically inevitable. Natural surface active substances contained in crude oil, such as asphaltene, amphiphilic clay, camphoric acid, etc., can be adsorbed on the surface of the microemulsion in the continuous phase to form a stable oil-water interface. These interfaces with low surface energy and high physical strength can hinder the polymerization between microemulsions, so that the aqueous emulsion has extremely high stability and is not easy to break. Once these stable emulsions enter the refining process, they will bring a series of negative effects. Taking the oil sands industry in Canada as an example, the blockage of pipelines caused by oil-in-water emulsions and the salt ...

Claims

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Application Information

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IPC IPC(8): C10G33/04B01D17/05
CPCB01D17/04C10G33/04
Inventor 徐政和杨帆谢汉杰卢周广
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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