Anhydrous aluminum chloride production method

Anhydrous aluminum chloride, production method technology, applied in aluminum chloride, aluminum halide and other directions, can solve problems such as difficult to meet industrial requirements, high impurity content, difficult to directly use and the like

Inactive Publication Date: 2015-07-15
GUIYANG AL-MG DESIGN & RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a production method of anhydrous aluminum chloride to solve the problem that the alumina product produced by the existing hydrochloric acid leaching method has fine particles, large specific surface area,

Method used

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Embodiment Construction

[0016] The production method of said anhydrous aluminum chloride comprises the following steps: immersing aluminum-making raw materials (fly ash or aluminum-containing minerals containing more than 30% aluminum) in hydrochloric acid to obtain aluminum chloride solution; The aluminum chloride solution is directly concentrated and crystallized to obtain aluminum chloride hexahydrate crystals; the aluminum chloride hexahydrate crystals are calcined at a temperature above 300°C to obtain primary alumina; primary alumina and carbon (the carbon can be petroleum coke , activated carbon, charcoal, coal coke and calcined coke) are mixed and added into the chlorination furnace, and chlorine gas is introduced and heated (the molar ratio of chlorine gas to alumina in the chlorination furnace is greater than 3, and the pressure It is normal pressure or slightly negative pressure, and the chlorination temperature is 800-1200°C). Aluminum oxide reacts with chlorine gas to form gaseous aluminu...

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Abstract

The invention relates to an anhydrous aluminum chloride production method. In the prior art, the aluminum chloride product produced by using the hydrochloric acid dissolution method has disadvantages of fine particle, large specific surface area and high impurity content, does not meet metallurgical grade alumina requirements, and is difficultly be subjected to direct use, and the prepared aluminum chloride purity is low and difficultly meets the industrial requirements even the aluminum chloride product is utilized. With the production method of the present invention, the problems in the prior art are solved. The production method comprises: immersing an aluminum production raw material into hydrochloric acid to obtain an aluminum chloride solution; directly carrying out concentration crystallization on the prepared aluminum chloride solution to obtain an aluminum chloride hexahydrate crystal; calcining the aluminum chloride hexahydrate crystal to obtain primary alumina; and mixing the primary alumina and carbon, adding to a chlorination furnace, introducing chlorine gas, heating, carrying out a reaction of the alumina and the chlorine gas to generate gaseous aluminum chloride, and carrying out refining impurity removing to obtain the pure anhydrous aluminum chloride. The production method of the present invention is used for industrial production of the anhydrous aluminum chloride.

Description

technical field [0001] The invention relates to a production method of aluminum chloride, in particular to a technology for producing anhydrous aluminum chloride by adding carbon chlorination to alumina produced by an acid leaching method as a raw material, and then refining and removing impurities. Background technique [0002] Aluminum chloride, molecular formula AlCl 3 , belonging to organic chemical products, is the main raw material for the preparation of dyes, widely used in the synthesis of catalysts, petroleum cracking, synthetic dyes, rubber, medicine, detergents, spices, pesticides and the preparation of organoaluminum compounds, and also used in metal smelting And wetting oil processing and so on. At the same time, aluminum trichloride is also a very important catalyst. [0003] A relatively economical and feasible method for the existing production of aluminum chloride is to produce aluminum oxide as a raw material, but with the increasing scarcity of bauxite r...

Claims

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Application Information

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IPC IPC(8): C01F7/58
Inventor 周小淞蒙钧
Owner GUIYANG AL-MG DESIGN & RES INST
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