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Preparation method of high-purity white crystalline aluminum chloride

A technology for crystallizing aluminum chloride and aluminum chloride, which is applied in the direction of aluminum chloride and aluminum halide, can solve problems such as incapable of large-scale industrial production, achieve resource reuse, realize large-scale production, and reduce costs Effect

Pending Publication Date: 2020-09-04
JIANGXI PENGTENG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many domestic enterprises that produce ordinary crystalline aluminum chloride, but the enterprises that produce high-purity white crystalline aluminum chloride are limited to the experimental stage, and cannot be scaled and industrialized.

Method used

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  • Preparation method of high-purity white crystalline aluminum chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] S1. Add aluminum-containing red mud (the content of aluminum oxide in the aluminum-containing red mud is 10% by mass) as a by-product of chemical enterprises and metallurgical enterprises, add hydrochloric acid with a mass concentration of 20%, and mix and react to make an unsaturated solution of aluminum chloride , and then undergo filtration, dehydration, and filter press impurity removal processes to make the solution clear and transparent;

[0017] S2, add 1% by mass percentage of aluminum particles to the solution for replacement reaction, replace metals whose activity is lower than that of aluminum in the solution, then add 0.5% by mass of strong oxidizing agent to reduce the iron in the solution, and then remove organic matter by organic ion exchange resin Solvent; then remove iron through macroporous adsorption resin ion exchange column, exchange other metal ions (copper, magnesium, arsenic, etc.) High-purity aluminum chloride solution;

[0018] S3. Concentrate...

Embodiment 2

[0020] S1, the by-product aluminum-containing red mud of chemical enterprises and metallurgical enterprises (aluminum oxide content is 15% by mass in the aluminum-containing red mud), add the hydrochloric acid of concentration 25%, mix reaction and make aluminum chloride unsaturated solution, Then, after filtration, dehydration, and pressure filtration to remove impurities, the solution is clear and transparent;

[0021] S2, add 2% by mass percentage of aluminum chips to the solution for replacement reaction, replace metals with lower activity than aluminum in the solution, then add 1% by mass of strong oxidizing agent to reduce iron in the solution, and then remove organic Solvent; then remove iron through macroporous adsorption resin ion exchange column, exchange other metal ions (copper, magnesium, arsenic, etc.) High-purity aluminum chloride solution;

[0022] S3. Concentrate and crystallize the aluminum chloride solution, and then perform centrifugal dehydration with a f...

Embodiment 3

[0024] S1, the by-product aluminum-containing red mud of chemical enterprises and metallurgical enterprises (aluminum oxide content is 20% by mass in the aluminum-containing red mud), add the hydrochloric acid of concentration 25%, mixed reaction makes aluminum chloride unsaturated solution, Then, after filtration, dehydration, and pressure filtration to remove impurities, the solution is clear and transparent;

[0025] S2. Add 5% by mass of aluminum powder to the solution for substitution reaction, replace metals with lower activity than aluminum in the solution, then add 1% by mass of strong oxidizing agent to reduce iron in the solution, and then remove organic Solvent; then remove iron through macroporous adsorption resin ion exchange column, exchange other metal ions (copper, magnesium, arsenic, etc.) High-purity aluminum chloride solution;

[0026] S3. Concentrate and crystallize the aluminum chloride solution, and then use a fully automatic titanium twisted cage for ce...

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Abstract

The invention discloses a preparation method of high-purity white crystalline aluminum chloride, which comprises the following steps: adding hydrochloric acid into byproduct aluminum-containing red mud of chemical enterprises and metallurgical enterprises, carrying out mixing reaction to prepare an aluminum chloride unsaturated solution, and carrying out filtration, dehydration and filter pressingimpurity removal to make the solution clear and transparent; adding aluminum particles, aluminum scraps or aluminum powder into the solution for replacement reaction, adding a strong oxidizing agentto reduce iron in the solution, and then removing an organic solvent through organic ion exchange resin; and replacing inorganic metal ions by a macroporous adsorption resin ion exchange column to obtain a high-purity aluminum chloride solution; and concentrating and crystallizing the aluminum chloride solution, and then carrying out centrifugal dehydration by using a full-automatic titanium material stranding cage to produce high-purity white crystal aluminum chloride. According to the method, the aluminum-containing red mud and the low-concentration byproduct hydrochloric acid are used as raw materials, so that resource recycling is effectively realized, various metal components in the product can be effectively treated, and the white crystalline aluminum chloride with the purity as highas 99.9% is obtained.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a preparation method of high-purity white crystalline aluminum chloride. Background technique [0002] High-purity white crystalline aluminum chloride is the cheapest raw material for producing high-purity alumina. It can replace high-purity sodium aluminate, aluminum ammonium sulfate, aluminum ammonium carbonate, aluminum isopropoxide and other raw materials for chemical production processes. At present, there are many domestic enterprises that produce ordinary crystalline aluminum chloride, but those that produce high-purity white crystalline aluminum chloride are limited to the experimental stage, and cannot be produced on a large scale or industrialized. Contents of the invention [0003] The purpose of the present invention is to provide a preparation method of high-purity white crystalline aluminum chloride, which mainly uses aluminum-containing red mud as a raw...

Claims

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Application Information

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IPC IPC(8): C01F7/56
CPCC01F7/56C01P2006/80
Inventor 姜鹏俊姜起腾姜起盛
Owner JIANGXI PENGTENG IND
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