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Method of preparing anhydrous aluminium chloride

A technology of anhydrous aluminum chloride and aluminum chloride hexahydrate, applied in aluminum chloride, aluminum halide and other directions, can solve the problems of low purity of anhydrous aluminum chloride, complicated process, etc., and achieves the advantages of environmental protection and simple process , the effect of low production cost

Inactive Publication Date: 2004-03-17
章浩龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has the following disadvantages: one is that the tail gas contains a small amount of chlorine, which needs to be treated and discharged; the other is that the anhydrous aluminum chloride produced is low in purity, and it needs to be refined by sublimation to obtain high-purity anhydrous aluminum chloride; the third is the process complex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Take 10 grams of aluminum chloride hexahydrate, put it into a beaker, add water to dissolve and prepare a solution, slowly pour 95% ethanol into it, and after the crystals in the beaker are fully separated, separate the solid and liquid in a centrifugal separator to obtain a white The crystal is anhydrous aluminum chloride. The concentration of the ethanol poured according to the above method can also be 75%, 99.5%. According to the above method, other methods can also be used for its solid-liquid separation, such as ordinary filtration. Impurities can also be removed by filtration after formulation into an aqueous solution.

Embodiment 2

[0010] Take 10 grams of aluminum chloride hexahydrate, put it into a beaker, add water to prepare an aqueous solution, filter to remove impurities, slowly pour into commercially available methanol, and after the crystals in the beaker are fully separated, solidify in a centrifugal separator. The liquid is separated to obtain white crystals which are anhydrous aluminum chloride. According to the above method, other methods can also be used for its solid-liquid separation, such as ordinary filtration. It is also possible to filter out impurities after the aluminum chloride hexahydrate is formulated into an aqueous solution.

Embodiment 3

[0012] Take 10 grams of aluminum chloride hexahydrate, put it into a beaker, add water to prepare an aqueous solution, filter to remove impurities, then slowly pour into commercially available n-propanol, and after the crystals in the beaker are fully separated, put them in a centrifugal separator Carry out solid-liquid separation to obtain white crystals which are anhydrous aluminum chloride. According to the above method, other methods can also be used for its solid-liquid separation, such as ordinary filtration. It is also possible to filter out impurities after the aluminum chloride hexahydrate is formulated into an aqueous solution.

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PUM

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Abstract

The present invention is one method of preparing anhydride aluminum chloride with simple technological process, no waste gas exhaust and high purity product. The aluminum chloride hexahydrate material is first compounded into water solution, C1-C4 alcohol is then added into the water solution for separating crystal, and the separated crystal as anhydride aluminum chloride product is finally separated from the solid-liquid mixture. The liquid after solid-liquid separation has main component alcohol and may be reused. The said process can eliminate impurity from aluminum chloride hexahydrateto obtain high purity anhydride aluminum chloride.

Description

technical field [0001] The invention relates to a preparation method of an inorganic salt, in particular to a preparation method of anhydrous aluminum chloride. Background technique [0002] Anhydrous aluminum chloride is widely used in organic synthesis catalysts, petroleum cracking catalysts, etc. In addition, it is also widely used in synthetic detergents, pesticides, dyes, spices, and metal refining. At present, most enterprises generally use the metal aluminum method to produce anhydrous aluminum chloride. The specific method is: put the preheated aluminum ingot into a closed chlorination reaction furnace, and send chlorine gas into the furnace from the top along the duct. Reaction occurs at 900°C: <chemistry num="001"> <chem file="02129997_cml001.xml" / > < / chemistry> , the generated aluminum chloride enters the condenser through the sublimation tube, where it is trapped and crystallized to obtain the finished product. The disadvantage of this proc...

Claims

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Application Information

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IPC IPC(8): C01F7/58
Inventor 章浩龙
Owner 章浩龙
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