Method of preparing crystal aluminum chloride from circulation fluid bed fly ash

A technology of circulating fluidized bed and crystalline aluminum chloride, applied in aluminum chloride, aluminum halide and other directions, can solve problems such as limited source of raw materials, and achieve the effects of good product quality, wide range of raw materials and simple production process

Inactive Publication Date: 2007-10-17
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sources of raw materials for this type of method are limited. With the increasing consumption of resources such as bauxite, a new alternative raw material and process must be found.

Method used

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  • Method of preparing crystal aluminum chloride from circulation fluid bed fly ash

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Effect test

Embodiment 1

[0021] Weigh 100 grams of circulating fluidized bed fly ash and place it in an acid-resistant reaction kettle, add 300 milliliters of hydrochloric acid with a mass concentration of 30%, and react for 2 hours under constant stirring at 100°C. Settling, generally using a settling tank, the slag liquid is separated in the settling tank to obtain the supernatant, and the aluminum chloride supernatant after the slag liquid separation is sent to the concentration tank for concentrated crystallization, and the sediment is leached slag, which is further washed , sedimentation, separation and discharge, in order to improve the settling performance, the flocculant polyacrylamide ammonium can be added, and the lotion from washing the filter residue is returned to the acid-resistant reaction kettle for reuse; the concentration tank is an enamel tank, which can be heated by steam, in order to speed up the concentration and crystallization The speed can be concentrated by negative pressure, ...

Embodiment 2

[0023] Weigh 100 grams of circulating fluidized bed fly ash, add 350 milliliters of hydrochloric acid with a mass concentration of 22.5%, and react for 2 hours under constant stirring at 100°C. , the slag liquid is separated in the settling tank to obtain the supernatant, and the aluminum chloride supernatant after the slag liquid separation is sent to the concentration tank for concentrated crystallization. , in order to improve the settling performance, the flocculant polyacrylamide ammonium can be added, and the lotion from washing the filter residue can be returned to the acid-resistant reaction kettle for reuse; the concentration tank is an enamel tank, which can be heated by steam. Concentrate under pressure, put the concentrated mother liquor into the buffer cooling tank, as the temperature drops, crystalline aluminum begins to precipitate, filter, and the filtrate enters the liquid storage tank for repeated use, and the obtained crystalline aluminum chloride is then spr...

Embodiment 3

[0025] Weigh 100 grams of circulating fluidized bed fly ash, add 400 milliliters of hydrochloric acid with a mass concentration of 15%, and react for 2 hours under constant stirring at 100°C. , the slag liquid is separated in the settling tank to obtain the supernatant, and the aluminum chloride supernatant after the slag liquid separation is sent to the concentration tank for concentrated crystallization. , in order to improve the settling performance, the flocculant polyacrylamide ammonium can be added, and the lotion from washing the filter residue can be returned to the acid-resistant reaction kettle for reuse; the concentration tank is an enamel tank, which can be heated by steam. Concentrate under pressure, put the concentrated mother liquor into the buffer cooling tank, as the temperature drops, crystalline aluminum begins to precipitate, filter, and the filtrate enters the liquid storage tank for repeated use, and the obtained crystalline aluminum chloride is then spray...

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Abstract

The present invention relates to a preparation method for crystalloid aluminum chlorate, in particular to a preparation method for crystalloid aluminum chlorate by using the circulating fluidized bed fly ash as raw material. By means of the better chemical activity of the aluminum contained in the circulating fluidized bed fly ash, the aluminum chlorate solution is obtained from the circulating fluidized bed fly ash by a direct acid dissolution process, and then the supernatant is obtained by separating the slag from the liquid in a setting tank, and the supernatant is concentrated and crystalled, finally, the solid crystalloid aluminum chlorate is obtained after spray drying. The present invention has a wide range of raw material, a low cost, a simple manufacturing process, quality product, less energy consumption, and meets the circular economy conception.

Description

Technical field: [0001] The invention relates to a method for preparing crystalline aluminum chloride, in particular to producing crystalline aluminum chloride by using circulating fluidized bed fly ash as raw material. Background technique: [0002] Circulating fluidized bed combustion technology is a new type of coal-fired technology, which has the advantages of wide adaptability to coal combustion, low pollution emissions, and high thermal efficiency. In the late 1980s, this technology was widely used after it was introduced into my country, especially in newly built coal gangue power plants fueled by coal gangue and low-quality coal. This technology will gradually replace traditional coal power plants in the field of coal-fired power generation Powder furnace combustion technology. [0003] At present, the methods for producing crystalline aluminum chloride in my country mainly include the aluminum ash one-step method and the bauxite acid-dissolving method. The aluminum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/56
Inventor 魏存弟杨殿范张东丽黄忠静刘光春袁兵
Owner JILIN UNIV
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