Production process of tin tetrachloride

Abstract

The invention relates to a production process of tin tetrachloride, belonging to the technical field of tin tetrachloride production processes. The process comprises the following steps: 1, directly adding a tin ingot to the tin feeding port of a tin tetrachloride reaction kettle, and heating so as to melt the tin ingot into liquid tin; 2, continuously introducing nitrogen into the tin tetrachloride reaction kettle, and reacting chloride with the melted liquid tin so as to generate gaseous tin tetrachloride, wherein the nitrogen introducing port of the tin tetrachloride reaction kettle is below the liquid level of the liquid tin; 3, continuously adding the tin ingot from the tin feeding port according to reaction conditions, continuously melting the tin by utilizing the heat released in the process of reacting the chloride with the melted liquid tin, and controlling the reaction temperature at 200-300 DEG C through controlling a chloride feeding speed; and 4, introducing the gaseous tin tetrachloride generated in the tin tetrachloride reaction kettle into a condenser and recovering tin tetrachloride liquid. The process has the advantages of simple process flow, complete reaction and less possibility of chloride pollution; and the prepared tin tetrachloride has the advantages of high purity and high yield.

Description

technical field [0001] The invention relates to a production process of tin tetrachloride, belonging to the technical field of tin tetrachloride production process. Background technique [0002] At present, the existing tin tetrachloride production process is as follows: tin is melted to make round tin ingots, cut into tin wires, and about 1 ton of tin wires are put into a tin tetrachloride reactor with a volume of about 2400 liters. , Pass into chlorine gas, chlorine gas reacts with solid tin (silk) to generate liquid tin tetrachloride and discharges from the outlet. According to the reaction situation, add tin wire intermittently through the tin filling port. The reaction process is an exothermic reaction, and the reaction temperature is controlled between 100 and 130°C by controlling the rate of chlorine addition. Disadvantages: It is necessary to frequently open the mouth to replenish tin wire, which is easy to leak chlorine gas and cause environmental pollution. The ...

AI Technical Summary

Problems solved by technology

Disadvantages: Need to open frequently to replenish tin wire, easy to leak chlorine gas and cause environmental pollution

The residence time of tin tetrachloride and chlorine gas in the reactor is short, the reaction is not complete, and the chlorine gas dissolved in tin tetrachloride is removed at the same time, resulting in impure tin tetrachloride, which affects the next reaction

If the temperature is too high, it will easily cause tin to melt, block the outlet of tin tetrachloride, and affect the reaction; the temperature can only be controlled between 100 and 130°C (the melting point of tin is 231.9°C), and the output cannot be increased

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