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Process for hydrothermally preparing zirconium oxychloride with low alkali consumption
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A technology of zirconium oxychloride and process method, applied in chemical instruments and methods, inorganic chemistry, zirconium compounds, etc., can solve the problems of high purity, large NaOH consumption, environmental pollution, etc., and achieve the promotion of reaction efficiency, reaction speed, The effect of reducing consumption
Active Publication Date: 2014-11-26
安徽通湾科技有限公司
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[0008] The purpose of the present invention is to solve the problems of large NaOH consumption, high energy consumption, excessive alkali cannot be recycled, and serious pollution to the environment in the process of producing zirconium oxychloride by zircon sand alkali fusion method, and to provide a low-consumption alkaline water A process for thermally preparing zirconium oxychloride, the zirconium oxychloride product obtained by this method has low impurity content and high purity
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Abstract
The invention relates to a process for hydrothermally preparing zirconium oxychloride with low alkali consumption, and belongs to the technical field of compound preparation. The process comprises the following steps: stirring crushed superfine zircon sand (ZrSiO4) powder with a NaOH solution to prepare slurry, and then placing the slurry into an autoclave to perform hydrothermal reaction, and thus generating amorphous or crystalline acmite sodiumzirconiumsilicate (Na2ZrSiO5) precursors under a condition with the temperature of 200-300 DEG C, the pressure of 3-7MPa and the reaction time of 3-12 hours; and then removing sodium by use of hydrochloric acid, removing silicon, purifying, concentrating and crystallizing to obtain zirconium oxychloride crystals. The process can be used for not only solving the problems such as high NaOH consumption, high energy consumption, recycling incapability of excessive alkali and serious pollution to the environment in the process of preparing the zirconium oxychloride from zircon sand by an alkali fusion method, but also realizing low impurity content and high purity of a zirconium oxychloride product obtained by the method.
Description
technical field [0001] The invention relates to a process for preparing zirconium oxychloride by hydrothermal method with low alkali consumption, and belongs to the technical field of compound preparation. Background technique [0002] Zirconium oxychloride is widely used, it can be used as raw material of mordant dye and additive of mordant, color fixer, deodorant, flame retardant, etc. It is also an important raw material for industrial-grade and high-purity zirconia and nano-ultrafine zirconia. Nano zirconia has excellent physical and chemical properties such as high melting point, high strength, wear resistance, and corrosion resistance, and is mainly used in the manufacture of structural ceramics and functional materials; zirconium carbonate, zirconium sulfate, and zirconium nitrate can be prepared using zirconium oxychloride as raw material , Zirconiumhydroxide and other zirconium chemicals are widely used in ceramics, chemical industry, light industry, electronics a...
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