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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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are many domestic enterprises that produce ordinary crystalline aluminum chloride, but the enterprises that prod

Method used

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  • Preparation method of high-purity white crystalline aluminum chloride

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[0015] Example 1

[0016] S1. The by-product aluminum-containing red mud of chemical enterprises and metallurgical enterprises (the alumina content of aluminum-containing red mud is 10% by mass) is added with 20% by mass hydrochloric acid, and the mixed reaction is mixed to produce an unsaturated aluminum chloride solution , And then go through filtration, dehydration, and pressure filtration to remove impurities to make the solution clear and transparent;

[0017] S2. Add 1% by mass of aluminum particles to the solution for displacement reaction to replace metals with lower activity than aluminum in the solution, and then add 0.5% by mass of strong oxidant to reduce the iron in the solution, and then remove the organic by organic ion exchange resin Solvent; then remove iron through the macroporous adsorption resin ion exchange column, exchange other metal ions (copper, magnesium, arsenic, etc.) through different macroporous adsorption resins and cation adsorption resins, exchange ...

Example Embodiment

[0019] Example 2

[0020] S1. The by-product aluminum-containing red mud of chemical enterprises and metallurgical enterprises (the alumina content of aluminum-containing red mud is 15% by mass) is added with 25% hydrochloric acid, and the mixed reaction is made into an unsaturated aluminum chloride solution. Then go through filtration, dehydration, and pressure filtration to remove impurities to make the solution clear and transparent;

[0021] S2. Add 2% mass percentage of aluminum scraps to the solution to carry out a substitution reaction to replace metals with lower activity than aluminum in the solution, and then add 1% mass percentage of a strong oxidant to reduce the iron in the solution, and then remove the organic by organic ion exchange resin Solvent; then remove iron through the macroporous adsorption resin ion exchange column, exchange other metal ions (copper, magnesium, arsenic, etc.) through different macroporous adsorption resins and cation adsorption resins, excha...

Example Embodiment

[0023] Example 3

[0024] S1. The by-product aluminum-containing red mud of chemical enterprises and metallurgical enterprises (the alumina content of aluminum-containing red mud is 20% by mass) is added to 25% hydrochloric acid, and the mixed reaction is mixed to produce an unsaturated aluminum chloride solution. Then go through filtration, dehydration, and pressure filtration to remove impurities to make the solution clear and transparent;

[0025] S2. Add 5% by mass of aluminum powder to the solution for displacement reaction to replace the metal with activity lower than aluminum in the solution, then add 1% by mass of a strong oxidant to reduce the iron in the solution, and then remove the organic by organic ion exchange resin Solvent; then remove iron through the macroporous adsorption resin ion exchange column, exchange other metal ions (copper, magnesium, arsenic, etc.) through different macroporous adsorption resins and cation adsorption resins, exchange organics and inorga...

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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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