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Acid method for preparing aluminum polychlorid and high-purity nanoscale white carbon black through ash of oil shale

A technology of polyaluminum chloride and oil shale ash, which is applied in the direction of aluminum chloride, aluminum halide, nanotechnology, etc., can solve the problems of land occupation and environmental pollution, and achieve the elimination of industrial pollution, low production cost and good performance indicators Effect

Inactive Publication Date: 2014-01-29
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stacking of oil shale ash not only occupies land but also pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The oil shale residue is sent to a ball mill or a Raymond machine for fine grinding to 50-90 mesh, and then screened to obtain finer ash, which is put into an electric furnace box and calcined at 750°C for 2 Hour. The calcined sample was placed in a reflux device, and concentrated hydrochloric acid with a mass fraction of 20% was added to reflux for 2 hours. After the reflux is completed, filter it with reduced pressure suction, then add the aluminum powder slightly remaining after reacting with impurity metal ions to the filtrate, and stir while heating, the temperature is controlled at 90°C, and remove the aluminum powder in the filtrate. Other metal impurities, and then suction-filtered to obtain the filtrate, then adding sodium hydroxide solution to adjust the pH value to 4, standing and aging for 24 hours, to obtain polyaluminum chloride (water purifying agent), the aluminum leaching rate is 78%, the basicity 81%. The filter residue obtained after the above filtr...

Embodiment 2

[0026] The oil shale residue is sent to a ball mill or a Raymond machine for fine grinding to 50-90 mesh, and then screened to obtain finer ash, which is put into an electric furnace box and calcined at 700°C for 2.5 Hour. The calcined sample was put into a reflux device, and concentrated hydrochloric acid with a concentration of 18% was added to reflux for 2.5 hours. After the reflux is completed, filter it with reduced pressure suction filtration, then add a small amount of aluminum powder to the filtrate, and stir while heating, the temperature is controlled at 90°C, remove other metal impurities in the filtrate, and then filter with suction to obtain the filtrate Add sodium hydroxide solution to adjust the pH value to 4, and leave it to age for 24 hours to obtain polyaluminum chloride (water purifying agent), with an aluminum leaching rate of 75% and a basicity of 78%. The filter residue obtained after the above filtration is moved to a round bottom flask, and then the fi...

Embodiment 3

[0028]The oil shale residue is sent to a ball mill or Raymond machine for fine grinding to 50-90 mesh, and then screened to obtain finer ash, which is put into an electric furnace box and calcined at 800°C for 2.5 Hour. The calcined sample was put into a reflux device, and concentrated hydrochloric acid with a concentration of 15% was added to reflux for 3.5 hours. After the reflux is completed, filter it with vacuum suction filtration, then add a small amount of aluminum powder to the filtrate, and stir while heating, the temperature is controlled at 90°C, remove other metal impurities in the filtrate, and then suction filter to obtain the filtrate Then add sodium hydroxide solution to adjust the pH value to 3.5, and leave it to stand for 24 hours to obtain polyaluminum chloride (water purifying agent), with an aluminum leaching rate of 72% and a salinity of 79%. The filter residue obtained after the above filtration is moved to a round-bottomed flask, and then the filter re...

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Abstract

The invention relates to an acid method for preparing aluminum polychlorid and high-purity nanoscale white carbon black through ash of oil shale. The method comprises steps of smashing and calcining the ash of oil shale, mixing the ash of the calcined oil shale with a hydrochloric acid solution, separating the solid and liquid so as to obtain solid residue and aluminum filtrate containing other metal ion impurities, leaching the aluminum filtrate through decompressing, adding a sodium hydroxide solution to regulate the pH value, standing for ageing, and obtaining the aluminum polychlorid; and washing the solid residue with water till the pH value is neutral, mixing the solid residue with a NaOH solution, heating and stirring, filtering, regulating the pH value, adding ethyl acetate and a dispersing agent, stirring in water bath, vacuum filtering, washing filter cakes, stoving and obtaining the high-purity nanoscale white carbon black. The aluminum polychlorid and white carbon black prepared by the acid method have good performance indexes, the basicity reaches 80%, the extraction rate reaches 80%, the purity of the white carbon black is 99%, the whiteness of the white carbon black is 98%, and the grain size of the white carbon black is 40-50nm. The acid method is simple, has low production cost, and is applicable to industrial production.

Description

[0001] technical field [0002] The invention relates to a preparation method of polyaluminum chloride and nanometer white carbon black, in particular to a method for preparing polyaluminum chloride and high-purity nanometer white carbon black by acid method of waste residue after oil refining in oil shale industry. Background technique [0003] In the field of water treatment engineering, the demand for polyaluminum chloride flocculant is increasing rapidly at home and abroad, especially in wastewater treatment, which has gradually replaced the traditional coagulant and become the mainstream flocculant. A large number of application practices have shown that using polyaluminum chloride instead of traditional iron and aluminum salt coagulants can significantly improve the purification efficiency of water plants, reduce treatment costs, and improve effluent water quality. Polyaluminum chloride has the characteristics of high charge density, low molecular weight, good hydrolyt...

Claims

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Application Information

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IPC IPC(8): C01F7/56C01B33/12B82Y40/00B09B3/00
Inventor 牛显春周建敏陈宇宁马志亮罗媚
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH