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Method for producing stannic chloride

A technology of tin tetrachloride and its production method, which is applied in the direction of tin chloride, tin halide, etc., can solve the problems of vicious cycle of harmful impurities, incomplete removal of harmful impurities in tin smelting, and high cost of raw materials, so as to increase the implementation of industrialization, Good versatility and the effect of increasing benefits

Active Publication Date: 2010-02-10
云南锡业研究院有限公司研究设计院
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] According to the inventor's research on the pilot production process of tin tetrachloride for many years, the above two methods of producing tin tetrachloride all take expensive refined tin as raw material, and the cost of raw material is high.
However, the current treatment method for crude tin pyro-refining slag does not completely remove impurities harmful to tin smelting, and some impurities harmful to tin smelting are returned to the tin smelting process, resulting in a vicious circle of harmful impurities in the tin smelting process

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  • Method for producing stannic chloride

Examples

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example 1

[0037] Add 1,000 kg of sulfur slag to a 1500 liter enamel reaction kettle, add 1000 kg of tin tetrachloride, seal the reaction kettle, and slowly introduce chlorine gas with slow stirring. Add cooling water to the jacket of the enamel reaction kettle, adjust the flow of cooling water, adjust the flow of chlorine, and control the reaction temperature of the materials in the kettle at 80-90°C, and react for 7 hours. Stop the introduction of chlorine gas and stop stirring. The conversion rate of tin in the slag into tin tetrachloride (tin leaching rate) is greater than 90%. Filtration, recover cuprous chloride and lead chloride from the filter cake produced by filtration. The filtrate is crude tin tetrachloride, which is added to the rectification tower for rectification and impurity removal to remove antimony trichloride and arsenic trichloride And sulfur. Antimony is recovered from antimony trichloride, arsenic is recovered from arsenic trichloride, and sulfur is returned to th...

example 2

[0039] Add 400kg of charcoal residue, 300kg of sulfur residue, 300kg of aluminum residue into a 1500-liter enamel reactor, add 1500kg of tin tetrachloride, seal the reactor, and slowly introduce chlorine gas with slow stirring. Add cooling water to the jacket of the enamel reactor, adjust the flow of the cooling water, adjust the flow of chlorine, and control the reaction temperature of the materials in the kettle at 100-110°C, and react for 5 hours. Stop the introduction of chlorine gas and stop stirring. The conversion rate of tin in the slag into tin tetrachloride (tin leaching rate) is greater than 90%. Filtration, recover cuprous chloride and lead chloride from the filter cake produced by filtration. The filtrate is crude tin tetrachloride, which is added to the rectification tower for rectification and impurity removal to remove antimony trichloride and aluminum trichloride , Arsenic trichloride and sulfur. Antimony is recovered from antimony trichloride, aluminum is rec...

example 3

[0041] Add 1000 kg of aluminum slag into a 1500 liter tubular reactor, add 500 kg of tin tetrachloride, seal the reactor, and slowly introduce chlorine gas with slow stirring. Add cooling water to the jacket of the reactor, adjust the flow of cooling water, adjust the flow of chlorine, and control the reaction temperature of the materials in the reactor at 60-70°C, and react for 9 hours. Stop the introduction of chlorine gas and stop stirring. The conversion rate of tin in the slag into tin tetrachloride (tin leaching rate) is greater than 90%. Filtration, recover cuprous chloride and lead chloride from the filter cake produced by filtration. The filtrate is crude tin tetrachloride, which is added to the rectification tower for rectification and impurity removal to remove antimony trichloride and aluminum trichloride , Arsenic trichloride. Antimony is recovered from antimony trichloride, aluminum is recovered from aluminum trichloride, and arsenic is recovered from arsenic tri...

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Abstract

The invention relates to a method for producing stannic chloride, in particular to a method for producing the stannic chloride with low cost, belonging to a technique for producing inorganic compoundstannic chloride. The method comprises the technological steps: (1) crude tin pyro-refining and outputting carbon residue, sulphur residue, aluminium residue, or leading crude tin and chlorine gas tohave chlorination reaction in a closed reactor, and obtaining crude product of the stannic chloride; (2) carrying out solid-liquid separation on liquid crude product of the stannic chloride, using solid filter residue for recovering copper, lead and iron, carrying out rectification, impurity removal and separation on the liquid part, and obtaining the product of the stannic chloride. The method reduces the production cost of the stannic chloride, and comprehensively recover the carbon residue, the sulphur residue and the aluminium residue produced by crude tin pyro-refining or the valuable metals such as iron, arsenic, copper, lead, aluminum and the like as well as sulphur in the crude tin; furthermore, when the tin is recovered, impurities which are harmful to tin smelting can be avoidedturning back to the process of smelting tin, thus preventing vicious circle of the detrimental impurities.

Description

Technical field [0001] The invention belongs to a production process of inorganic compound tin tetrachloride, in particular to a low-cost production method of tin tetrachloride. Background technique [0002] Tin tetrachloride is a colorless and transparent fuming liquid with a melting point of -33°C, a boiling point of 114°C, a relative density of 2.23, and a molecular formula of SnCl 4 . Tin tetrachloride has a wide range of uses and can undergo addition reactions with organic substances, such as alcohols, ethers, aldehydes, ketones, carboxylic acids, esters, unsaturated hydrocarbons, amines, etc. It is a raw material for the synthesis of methyl tin, butyl tin and other organic tin chemical products ; Tin tetrachloride can be reduced to stannous chloride by metal tin, and can also be used as a raw material for the production of tin dioxide, sodium stannate and other inorganic tin chemical products. [0003] Regarding the production method of tin tetrachloride, both domestic and f...

Claims

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Application Information

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IPC IPC(8): C01G19/08
Inventor 陈绍春
Owner 云南锡业研究院有限公司研究设计院
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