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Method for preparing nano iron oxide red from chlorinated waste residues

A technology of chlorinated waste residue and red iron oxide, applied in the direction of iron oxide, iron oxide/iron hydroxide, nanotechnology for materials and surface science, etc. Easy to agglomerate and other problems, to achieve the effect of narrow crystal particle size distribution and uniform particle size

Active Publication Date: 2020-01-21
YIBIN HAIFENG HERUI +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing nano-iron oxide red by using chlorination waste residue. This method solves the problem that the particles are easy to agglomerate during the precipitation process, and the generated iron oxide red material has a large particle size and unevenness.

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  • Method for preparing nano iron oxide red from chlorinated waste residues
  • Method for preparing nano iron oxide red from chlorinated waste residues

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Experimental program
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Effect test

Embodiment 1

[0029] (1) The mixing ratio of chlorinated waste slag and water is 1:1. After mixing, filter to obtain the chlorinated waste slag mother liquor in which the particle size of petroleum coke is less than 1 μm. / L SDBS solution, stirred at a constant speed for 0.5h, and the stirring speed was 300r / min;

[0030] (2) adding sodium carbonate solution to the chlorination waste residue mother liquor, adjusting the pH to 5 to prepare the nano-iron oxide red precursor;

[0031] (3) Put the precursor into the hydrothermal reaction kettle, and the hydrothermal reaction kettle was subjected to hydrothermal reaction for 8 hours at 160°C;

[0032] (4) After the hydrothermal reaction is completed, the materials in the kettle are filtered, washed, and dried at 98°C for 4 hours to obtain nano-iron red, which is then roasted at 300°C for 3 hours to obtain nano-iron oxide red product. Finally, Fe in nano-iron oxide red 2 o 3 The content is 96.2%.

Embodiment 2

[0034] (1) The mixing ratio of chlorinated waste residue and water is 1:1.5. After mixing, filter to obtain the mother liquor of chlorinated waste residue with a particle size of petroleum coke less than 0.8 μm. mol / L PEG200 solution, stirred at a constant speed for 2 hours, and the stirring speed was 400r / min;

[0035] (2) adding NaOH solution to the chlorination waste residue mother liquor, adjusting the pH to 5 to prepare the nano-iron oxide red precursor;

[0036] (3) Put the precursor into the hydrothermal reaction kettle, and the hydrothermal reaction kettle was subjected to hydrothermal reaction for 12 hours under the condition of 200°C;

[0037] (4) After the hydrothermal reaction is completed, the materials in the kettle are filtered, washed, and dried at 105°C for 1 hour to obtain nano-iron red, which is then roasted at 700°C for 6 hours to obtain nano-iron oxide red product. Finally, Fe in nano-iron oxide red 2 o 3 The content is 96.6%.

Embodiment 3

[0039] (1) The mixing ratio of chlorinated waste residue and water is 1:2. After mixing, filter to obtain the mother liquor of chlorinated waste residue with a particle size of petroleum coke less than 0.6 μm. Measure 100ml of the mother liquor of chlorinated waste residue, add 20ml to a concentration of 1mol / L of PEG2000 solution, stirred at a constant speed for 6 hours, and the stirring speed was 150r / min;

[0040] (2) adding sodium carbonate solution to the chlorination waste residue mother liquor, adjusting the pH to 3 to prepare the nano-iron oxide red precursor;

[0041] (3) Put the precursor into the hydrothermal reaction kettle, and the hydrothermal reaction kettle was subjected to hydrothermal reaction for 4 hours under the condition of 180°C;

[0042] (4) After the hydrothermal reaction is completed, the materials in the kettle are filtered, washed, and dried at 102°C for 3 hours to obtain nano-iron red, which is then roasted at 600°C for 2 hours to obtain nano-iron...

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Abstract

The invention discloses a method for preparing nano iron oxide red from chlorinated waste residues, which comprises the following steps: adding water into chlorinated waste residues with stirring fordissolution, carrying out solid-liquid separation to obtain chlorinated waste residue mother liquor, and carrying out wet preparation on the chlorinated waste residue mother liquor serving as a raw material to obtain nano iron oxide red; wherein the particle size of the petroleum coke in the chlorinated waste residue mother liquor is 50 nm to 1 [mu]m, and the mass percentage of the petroleum cokein the chlorinated waste residue mother liquor is 0.05-0.5%. After the chlorination waste residues are processed into slurry, large-particle titanium-rich materials and petroleum coke are removed, wherein extremely-fine-particle petroleum coke remains in the pulp and is beneficial to nucleation of nanoscale iron oxide red crystals and growth of the crystals during hydrothermal reaction, so that the obtained crystals are narrow in particle size distribution, uniform in particle size and free of agglomeration; according to the invention, the main size of the obtained nanometer iron oxide red crystal is 200 nm, and the particle size ratio of 150 nm to 350 nm reaches 27%-35%.

Description

technical field [0001] The invention relates to the technical field of preparing nano-iron red, in particular to a method for preparing nano-iron oxide red by using chlorination waste residue. Background technique [0002] Iron oxide red (α-Fe 2 o 3 ) is a high-quality pigment with high hiding power and tinting power, cheap, non-toxic, and is widely used in fields such as building materials, coatings, plastics, rubber, and ceramics. When the particle size of iron oxide red reaches the nanoscale level, the specific surface area and surface energy will increase significantly with the decrease of the particle size, which will highlight the small size effect, especially the decrease in the scattering ability and surface covering power of visible light waves. , showing a certain "transparent" state; at the same time, many potential physical and chemical properties, such as magnetism, catalytic performance, etc., can be fully utilized, making iron oxide more widely used in more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06B82Y30/00
CPCC01G49/06B82Y30/00C01P2004/62
Inventor 陈洪李露徐慧远周高明冯支斌张祖超
Owner YIBIN HAIFENG HERUI