阅读说明：本技术 一种高纯白色结晶氯化铝的制备方法 (Preparation method of high-purity white crystalline aluminum chloride ) 是由 姜鹏俊 姜起腾 姜起盛 于 2020-05-14 设计创作，主要内容包括：本发明公开了一种高纯白色结晶氯化铝的制备方法,将化工企业和冶金企业的副产品含铝赤泥,加入氢氯酸,混合反应制成氯化铝不饱和溶液,然后经过过滤、脱水、压滤除杂工艺,使溶液清澈透明；向该溶液加入铝粒、铝屑或铝粉进行置换反应,然后加强氧化剂将溶液中铁还原,然后通过有机离子交换树脂除去有机溶剂；再通过大孔吸附树脂离子交换柱置换出无机金属离子。制出高纯度的氯化铝溶液；将氯化铝溶液浓缩结晶,然后用全自动钛材绞笼进行离心脱水,生产出高纯白色结晶氯化铝。本发明利用含铝赤泥、低浓度副产氢氯酸为原料,有效地实现了资源化重复利用,能有效的将产品中的各种金属成分处理,得到纯度高达99.9％的白色结晶氯化铝。(The invention discloses a preparation method of high-purity white crystalline aluminum chloride, which comprises the steps of adding hydrochloric acid into aluminum-containing red mud which is a byproduct of chemical enterprises and metallurgical enterprises, mixing and reacting to prepare an unsaturated aluminum chloride solution, and then filtering, dehydrating, filter-pressing and impurity removing processes to ensure that the solution is clear and transparent; adding aluminum particles, aluminum scraps or aluminum powder into the solution for replacement reaction, then reinforcing an oxidant to reduce iron in the solution, and then removing the organic solvent through organic ion exchange resin; and then replacing inorganic metal ions by a macroporous adsorption resin ion exchange column. Preparing high-purity aluminum chloride solution; 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 crystalline aluminum chloride. The method utilizes the aluminum-containing red mud and the low-concentration byproduct hydrochloric acid as raw materials, effectively realizes resource recycling, can effectively treat various metal components in the product, and obtains the white crystalline aluminum chloride with the purity of 99.9 percent.)

1. A preparation method of high-purity white crystalline aluminum chloride is characterized by comprising the following steps:

s1, adding byproduct low-concentration hydrochloric acid into byproduct aluminum-containing red mud of chemical enterprises and metallurgical enterprises, mixing and reacting to prepare an aluminum chloride unsaturated solution, and then filtering, dehydrating, filter-pressing and impurity removing to ensure that the solution is clear and transparent;

s2, adding aluminum particles, aluminum scraps or aluminum powder into the solution for replacement reaction, then reinforcing an oxidant to reduce iron in the solution, and then removing an organic solvent through organic ion exchange resin; replacing inorganic metal ions by different macroporous adsorption resin ion exchange columns so as to prepare high-purity aluminum chloride solution;

s3, concentrating and crystallizing the aluminum chloride solution, and then carrying out centrifugal dehydration through a full-automatic titanium material stranding cage to produce high-purity white crystalline aluminum chloride.

2. The method for producing a high purity white crystalline aluminum chloride according to claim 1, wherein the concentration of hydrochloric acid is 20 to 30% by mass.

3. The method for preparing high purity white crystalline aluminum chloride according to claim 1, wherein the amount of aluminum particles, aluminum flakes or aluminum powder added is 1 to 5% by mass of the solution.

4. The method for preparing high purity white crystalline aluminum chloride according to claim 1, wherein the strong oxidizer is added in an amount of 0.5 to 1% by mass of the solution.

5. The method for preparing high-purity white crystalline aluminum chloride according to claim 1, wherein the aluminum oxide content of the aluminum-containing red mud is between 10 and 30 percent.

Technical Field

The invention relates to the technical field of chemical industry, in particular to a preparation method of high-purity white crystalline aluminum chloride.

Background

The high-purity white crystalline aluminum chloride is the cheapest raw material for producing high-purity aluminum oxide, and can replace the raw materials of various chemical production processes such as high-purity sodium aluminate, aluminum ammonium sulfate, aluminum ammonium carbonate, aluminum isopropoxide and the like. At present, a plurality of enterprises for producing common crystalline aluminum chloride in China exist, but the enterprise for producing high-purity white crystalline aluminum chloride is only limited to the experimental stage and cannot realize large-scale and industrialized production.

Disclosure of Invention

The invention aims to provide a preparation method of high-purity white crystalline aluminum chloride, which mainly utilizes aluminum-containing red mud as a raw material, effectively realizes resource recycling, saves domestic aluminum ore resources, and has very important significance.

In order to achieve the purpose, the invention adopts the following technical scheme: a preparation method of high-purity white crystalline aluminum chloride comprises the following steps:

s1, mixing and reacting by-products of chemical enterprises and metallurgical enterprises, namely aluminum-containing red mud and low-concentration hydrochloric acid to prepare an unsaturated aluminum chloride solution, and then filtering, dehydrating, filter-pressing and impurity-removing to ensure that the solution is clear and transparent;

s2, adding aluminum particles, aluminum scraps or aluminum powder into the solution for replacement reaction, then reinforcing an oxidant to reduce iron in the solution, and then removing organic ions through organic ion exchange resin; and then the inorganic ions are replaced by an ion exchange column. Preparing high-purity aluminum chloride solution;

s3, concentrating and crystallizing the aluminum chloride solution, and then centrifugally dewatering to produce high-purity white crystalline aluminum chloride.

Further preferably, the concentration of hydrochloric acid is 20 to 30% by mass.

More preferably, the amount of aluminum particles, aluminum shavings or aluminum powder added is 1-5% of the mass of the solution.

More preferably, the amount of the strong oxidant added is 0.5 to 1% by mass of the solution.

More preferably, the aluminum oxide content of the aluminum-containing red mud is between 10 and 30 percent.

The invention has the beneficial effects that: the aluminum-containing red mud is mainly used as a raw material, so that resource recycling is effectively realized, various metal components in the product can be effectively treated, the large-scale production of full-automatic centrifugal dehydration is realized, the cost is reduced, the white crystalline aluminum chloride with the purity of 99.9 percent is obtained, high-purity raw materials are provided for various industries such as production of high-purity aluminum oxide, resin, flame retardant, heat stabilizer and the like, the foreign market monopoly is effectively broken, and high-quality raw materials are provided for the development of domestic industrial chains.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.