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Method for preparing polar solvent soluble nano ferriferrous oxide granule

A technology of ferric oxide and polar solvents, applied in the field of nanometers, can solve the problems of difficult to disperse particles, easy agglomeration of particles, fast reaction speed, etc., and achieve uniform particle size distribution, good dispersibility, and short production cycle.

Inactive Publication Date: 2006-05-24
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main shortcoming of this method is: 1. the reaction that carries out in the aqueous phase environment, reaction speed is fast, and the particle that obtains is big, and distribution is uneven; In the case of other surfactants or polymer protection, the particles are easy to agglomerate, and it is difficult to obtain well-dispersed particles in water

Method used

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  • Method for preparing polar solvent soluble nano ferriferrous oxide granule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 0.05molFeCl 3 ·6H 2 O and 0.025mol FeCl 2 4H 2 O, dissolved in 10ml of water to obtain iron salt solution, measure 2ml of diisopropylamine in a graduated cylinder, and dissolve in 30ml of n-hexane. Under the condition of nitrogen protection, the aqueous solution of the iron salt was slowly dropped into the diisopropylamine / n-hexane solution, the temperature was controlled at 25° C., and the whole reaction lasted for 1 hour. After the reaction product was taken out, the reaction product was washed once with acetone by centrifugation (11,000 rpm, 10 minutes), and the black powder was obtained after vacuum freeze-drying for 12 hours, which was nanometer ferric oxide particles.

[0017] The obtained black powder can be determined as ferric oxide particles with inverse spinel structure by X-ray diffraction (XRD), and its purity is very high.

[0018] The as-prepared particles were observed by transmission electron microscopy, as figure 1 As shown, it can be seen t...

Embodiment 2

[0022] Weigh 0.05molFeCl 3 ·6H 2 O and 0.025mol FeCl 2 4H 2 O, dissolved in 100ml of water to obtain iron salt solution, measure 10ml of diisobutylamine in a graduated cylinder, and dissolve in 300ml of n-heptane. Under the condition of nitrogen protection, the diisobutylamine / n-heptane solution was slowly dropped into the aqueous solution of iron salt, the temperature was controlled at 50°C, and the whole reaction lasted for 0.5 hours. After the reaction product was taken out, the reaction product was washed once with acetone by centrifugation (11000 rpm, 10 minutes), then washed five times with deionized water, and then vacuum freeze-dried for 24 hours to obtain a black powder, which was nanometer ferric oxide particles.

[0023] The obtained black powder can be determined as ferric oxide particles with inverse spinel structure by X-ray diffraction (XRD), and its purity is very high.

[0024] Observing the prepared particles with a transmission electron microscope, it ca...

Embodiment 3

[0028] Weigh 0.2molFeCl 3 ·6H 2 O and 0.1mol FeCl 2 4H 2 O, dissolved in 100ml of water to obtain iron salt solution, measure 50ml of di-n-butylamine in a graduated cylinder, and dissolve in 1000ml of n-hexane. Under the condition of nitrogen protection, the di-n-butylamine / n-hexane solution was slowly dropped into the aqueous solution of iron salt, the temperature was controlled at 60° C., and the whole reaction lasted for 10 hours. After taking out the reaction product, adopt centrifugation method (11000 rev / min, 10 minutes) to wash 5 times with acetone, then wash 5 times with deionized water, obtain black powder after 18 hours of vacuum freeze-drying, be nano ferric oxide particles.

[0029] The obtained black powder can be determined as ferric oxide particles with inverse spinel structure by X-ray diffraction (XRD), and its purity is very high.

[0030] Observing the prepared particles with a transmission electron microscope, it can be seen that the prepared ferric oxi...

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Abstract

The invention relates to a controlling and resource recovering method for waste water in tobias acid production, adjusting the pH of the waste water and filtering, and making main organic matters in the waste water absorbed on resins by macroporous weakly basic resin and super-high cross-linking absorbing resin combination. And before processing, the waste water is puce, chroma of the waste water is 45000-5000mg / L, sulphonated tobias acid concentration of the waste water is 12000-15000mg / L, tobias acid and 2, 1-acid concentration of the e waste water is 6000-7000mg / L, COD concentration of the waste water is 45000-50000mg / Lú¼and after processing, the chroma is 10-50, sulphonated tobias acid concentration <500mg / L, the TuShi acid and 2, 1-acid concentration<50mg / L, and CODcr<1500mg / L. And the resins regenerate by de-absorption of liquid alkali and water. High concentration de-absorbing liquor returns to the aminating operation segment in the tobias acid producing process and low concentration de-absorbing liquor is used in the next de-absorbing operation.

Description

technical field [0001] The invention relates to a method in the field of nanotechnology, in particular to a method for preparing nano ferric oxide particles soluble in polar solvents. Background technique [0002] In recent years, due to the broad prospects of magnetic nanoparticles in practical applications, the research on the preparation methods and properties of magnetic nanoparticles has received great attention. In terms of magnetic recording materials, magnetic nanoparticles are expected to replace traditional micron-sized magnetic powder for high-density magnetic recording materials; in the biological field, magnetic microspheres made of magnetic nanomaterials can be widely used in magnetic resonance imaging, medicine Carriers, hyperthermia, and separation of cells and proteins. There are many methods for the preparation of nano-Fe3O4 particles, which can be generally divided into wet method and dry method. The wet method mostly uses ferrous chloride and ferric chl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08
Inventor 孙康窦红静陶可
Owner SHANGHAI JIAO TONG UNIV
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