Magnetic nano material as well as preparation method and application thereof

A magnetic nanometer and nanoparticle technology, applied in the field of nanomaterials, can solve the problems of demanding demulsification temperature, slow demulsification speed, and limited popularization and application.

Active Publication Date: 2021-06-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Magnetic nanoparticles have obvious advantages in the separation process of oil-water emulsions. However, with the development of the petroleum industry, the type, shape and structure of the emulsion tend to be complex, and the difficulty of demulsification is increasing. The application of magnetic nanoparticles for demulsification currently exists Problems such as low efficiency, slow demulsification speed, and demanding demulsification temperature
Moreover, most magnetic nanoparticle demulsifiers can only target a specific emulsion, and the scope of application is severely limited, limiting its practical application.

Method used

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  • Magnetic nano material as well as preparation method and application thereof
  • Magnetic nano material as well as preparation method and application thereof
  • Magnetic nano material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] This embodiment provides a magnetic nanomaterial, the magnetic nanomaterial includes a magnetic core of ferroferric oxide, the outer side of the magnetic core is coated with a layer of silica shell, and the outer side of the silica shell is grafted as shown in the formula (1) the organic group shown;

[0108]

[0109] R in formula (1) 1 for -CH 2 -CH 2 -, R 2 for -CH 2 (CH 3 )CH-;

[0110] The average particle diameter of the magnetic nanomaterial is 9nm, and the silica shell is a group shown in formula (2):

[0111]

[0112] R described in formula (2) 3 and R 4 are each independently O- or OH.

[0113] This embodiment also provides a preparation method of the magnetic nanomaterial, the preparation method comprising the following steps:

[0114] (1) Weigh 0.44g FeCl 2 4H 2 O and 1.10 g FeCl 3 ·6H 2 O was dissolved in 50mL deionized water, the temperature of the solution was adjusted to 60°C, and 20mL of ammonia water (5wt%) was slowly added dropwise ...

Embodiment 2

[0122] This embodiment provides a magnetic nanomaterial, the magnetic nanomaterial includes a magnetic core of ferroferric oxide, the outer side of the magnetic core is coated with a layer of silica shell, and the outer side of the silica shell is grafted as shown in the formula (1) the organic group shown;

[0123]

[0124] R in formula (1) 1 for -CH 2 -CH 2 -, R 2 for -CH 2 (CH 3 )CH-;

[0125] The average particle diameter of the magnetic nanomaterial is 9.5nm, and the silica shell is a group shown in formula (2):

[0126]

[0127] R described in formula (2) 3 and R 4 are each independently O- or OH.

[0128] This embodiment also provides a preparation method of the magnetic nanomaterial, the preparation method comprising the following steps:

[0129] (1) Weigh 0.43g Fe(NH 4 ) 2 (SO 4 ) 2 ·6H 2 O and 0.40g Fe 2 (SO 4 ) 3 Dissolve in 50mL of deionized water, adjust the temperature of the solution to 60°C, slowly add 25mL of ammonia water (5wt%) dropwise...

Embodiment 3

[0134] This embodiment provides a magnetic nanomaterial, the magnetic nanomaterial includes a magnetic core of ferroferric oxide, the outer side of the magnetic core is coated with a layer of silica shell, and the outer side of the silica shell is grafted as shown in the formula (1) the organic group shown;

[0135]

[0136] R in formula (1) 1 for -CH 2 -CH 2 -, R 2 for -CH 2 (CH 3 )CH-;

[0137] The average particle diameter of the magnetic nanomaterial is 8.6nm, and the silica shell is a group shown in formula (2):

[0138]

[0139] R described in formula (2) 3 and R 4 each independently O- or CH 3 O-.

[0140] This embodiment also provides a preparation method of the magnetic nanomaterial, the preparation method comprising the following steps:

[0141] (1) Weigh 0.44g FeCl 2 4H 2 O and 1.10 g FeCl 3 ·6H 2 Dissolve O in 50mL deionized water, adjust the temperature of the solution to 60°C, and slowly add 10mL sodium hydroxide solution (0.10mol / L) dropwise...

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Abstract

The invention provides a magnetic nano material and a preparation method and application thereof. The magnetic nano-material comprises a magnetic core, a silicon dioxide shell and an amphiphilic organic group grafted outside the silicon dioxide shell. The magnetic nano material has the advantages of being uniform in particle size, magnetic responsive, amphiphilic, non-toxic, environmentally friendly and low in production cost; no by-product is generated in the preparation process, the oil-water interfacial tension can be remarkably reduced, and the method has a good application prospect in the field of oil-water emulsion separation.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a magnetic nanomaterial and its preparation method and application. Background technique [0002] Oil-water emulsions are widely used in oil and gas industry, fuel chemical industry, environmental science and resource utilization and other fields. Taking the petrochemical industry as an example, in the process of oil extraction, due to the existence of natural interfacial active substances, a stable water-in-oil emulsion is often formed. The inorganic salts contained in the water droplets will cause corrosion and scaling of equipment and pipelines during storage and transportation, and easily Cause catalyst poisoning in the refining process. On the other hand, the discharge of oily wastewater and frequent accidents such as oil spills at sea will produce stable oil-in-water emulsions, causing environmental and ecological pollution. It can be seen that oil-water emulsion se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/05C10G33/04
CPCB01D17/047C10G33/04
Inventor 何林周泾径隋红李鑫钢
Owner TIANJIN UNIV
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