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Method for distilling stibium chloride continuously

A technology of antimony trichloride and distillation pot, which is applied in chemical instruments and methods, chloride preparation, inorganic chemistry, etc., can solve the problems of high labor intensity, difficulty in popularization and application, low recovery rate of antimony trichloride, etc., and achieve recovery high rate effect

Inactive Publication Date: 2007-05-09
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing method has following shortcoming: 1. production process can not be continuous, can only intermittently produce, and labor intensity is big; Material evaporates together, low recovery of antimony trichloride
Therefore, its practicability is not good enough, so it is difficult to popularize and apply

Method used

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  • Method for distilling stibium chloride continuously

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The leaching solution of antimony oxychloride slag leached with hydrochloric acid contains Sb 3+ 228g / l, Bi 3+ 5g / l, Pb 2+ 1.34g / l, Ag + 0.31g / l and As 3+ 26g / l antimony trichloride solution flows in from the top of the distillation tower at a rate of 1.3 liters per hour, the temperature in the first distillation pot is controlled to be 190°C, the temperature in the top of the distillation tower is controlled to be 100°C, and the low boiling point Substances such as HCl, H 2 O and AsCl 3 Evaporate and cool and flow into the liquid storage tank; the resulting antimony trichloride and other high boiling point substances such as PbCl 2 , AgCl and BiCl 3 Wait for the molten salt to flow into the first distillation pot at the bottom of the distillation tower. Open the valve connecting the first still and the second still, raise the negative pressure in the second still, pump the anhydrous antimony trichloride molten salt in the first still into the second still, and c...

Embodiment 2

[0023] The leaching solution of brittle sulfur-lead-antimony concentrate leached by chloride contains Sb 3+ 240g / l, Fe 2+ 75g / l, Pb 2+ 1.95g / l, Ag + 0.64g / l and Zn 2+ The antimony trichloride solution of 31g / l flows in from the upper part of the distillation tower at a rate of 1.1 liters per hour, and the temperature in the first distillation pot is controlled to be 200°C, and the temperature of the upper part of the distillation tower is controlled to be 130°C, and the low boiling point Substances such as HCl, H 2 O, AsCl 3 and SnCl 2 Evaporate and cool and flow into the liquid storage tank; the resulting antimony trichloride and other high boiling point substances such as PbCl 2 , AgCl, ZnCl 2 and FeCl 2 Wait for the molten salt to flow into the first distillation pot at the bottom of the distillation tower. Open the valve connecting the first still and the second still, raise the negative pressure in the second still, pump the anhydrous antimony trichloride molten ...

Embodiment 3

[0026] The leaching solution of lead anode slime leached by chloride contains Sb 3+ 310.20g / l, Bi 3+ 7.85g / l, Pb 2+ 1.34g / l, Ag + 0.341g / l, As 3+ 2.9g / l, Cu 2+ 4.43g / l and Fe 2+ 0.32g / l antimony trichloride solution flows in from the upper part of the distillation tower at a rate of 1 liter per hour, the temperature in the first distillation pot is controlled to be 170°C, the temperature in the upper part of the distillation tower is controlled to be 30°C, and the low boiling point Substances such as HCl, H 2 O, AsCl 3 and SnCl 2 Evaporate and cool and flow into the liquid storage tank; the resulting antimony trichloride and other high boiling point substances such as PbCl 2 、BiCl 3 CuCl 2 , ZnCl 2 and FeCl 2 Wait for the molten salt to flow into the first distillation pot at the bottom of the distillation tower. Open the valve connecting the first still and the second still, raise the negative pressure in the second still, pump the anhydrous antimony trichloride...

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Abstract

This invention relates to a method for producing SbCl3 by continuous distillation through a distillation column, a first distillation pot, and a second distillation pot. The first distillation pot is at the lower part of the distillation column, and is through connected with the distillation column. The first and second distillation pots are through connected via a pipeline with a valve. Low-boiling-point substances, such as HCl,H2O,AsCl3 and SnCl2, are distilled out of the distillation column from the top, while the molten salts of high-boiling-point substances flow into the first distillation pot at the lower part of the distillation column. SbCl3 is not distilled with the low-boiling-point substances, thus has a high recovery rate. The whole production process is continuous rather than stepwise, thus can be controlled by an automatic control system.

Description

(1) Technical field [0001] The invention relates to a method for continuous distillation of antimony trichloride. (2) Background technology [0002] The existing methods for preparing anhydrous antimony trichloride by distillation of antimony trichloride solution are discontinuous, and it is difficult to form industrialized production. Therefore the existing method usually evaporates low boiling point substances such as HCl, H 2 O, AsCl 3 and SnCl 2 Wait, then distill antimony trichloride out, high boiling point impurities remain in the still pot, every distillation, the still pot is cleaned once, to achieve the purpose of distillation and purification of antimony trichloride. Existing method has following shortcoming: 1. production process can not be continuous, can only intermittently produce, and labor intensity is big; The material evaporates together, and the recovery of antimony trichloride is low. Therefore its practicability is not good enough, so it is difficul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G30/00C01B9/02
Inventor 郑国渠
Owner ZHEJIANG UNIV OF TECH