Production method of sodium thiosulfate pentahydrate

A technology of sodium thiosulfate pentahydrate and its production method, applied in the directions of thiosulfate/dithionite/polythionate, chemical instruments and methods, alkali metal sulfite/sulfite, etc., capable of Solve the problems of many elements in the slag, high difficulty in producing qualified products, and complex components, so as to achieve the effects of reducing production costs, high production efficiency, and protecting the environment

Inactive Publication Date: 2017-02-22
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the production of sodium thiosulfate pentahydrate by using chlorine leaching slag, hot filter slag, and elemental sulfur-containing slag after hydrometallu

Method used

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  • Production method of sodium thiosulfate pentahydrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Slag containing elemental sulfur: S 66.25%, Na 2 SO4 12%, Ag 50.9g / t, Au 46.38g / t, Pd 23.46g / t, Pt31.82g / t. Put the slag material containing elemental sulfur in a beaker with a stirring device, add water to the beaker, the amount of water added is 10 times that of the slag material containing elemental sulfur on a dry basis, after stirring for 30 minutes, filter and separate to obtain the main components: For filter cake A and filtrate A of elemental sulfur, continue to add sodium sulfite and water into the beaker containing filter cake A, the amount of sodium sulfite added is 1.15 times of the theoretical calculation amount, and the amount of water added is 17 times the weight of the slag material containing elemental sulfur , put the mixed solution beaker in a water bath, heat and stir the sodium sulfite and elemental sulfur at 80°C for 3.5 hours, and detect that the pH of the solution is 7-8 and the solution is colorless and transparent. After solid-liquid separation...

Embodiment 2

[0026] The composition of the slag material containing elemental sulfur is the same as in Example 1. Put the slag material containing elemental sulfur in a beaker with a stirring device, add water to the beaker, the amount of water added is 10 times that of the slag material containing elemental sulfur on a dry basis, after stirring for 30 minutes, filter and separate to obtain the main components: Filter cake A and filtrate A of elemental sulfur slag material, continue to add sodium sulfite and water in the beaker that filter cake A is housed, the addition of sodium sulfite is 1.2 times of theoretically calculated amount, and the addition of water is 1 / 2 of the weight of elemental sulfur slag material. 20 times, put the mixed solution beaker in a water bath, heat and stir at 80°C for 3.5 hours, detect that the pH of the solution is > 8 and the solution is white and translucent, continue to add elemental sulfur-containing slag, and adjust the pH of the solution 7-8 and the sol...

Embodiment 3

[0028] The composition of the slag material containing elemental sulfur is the same as in Example 1. Put the slag material containing elemental sulfur in a beaker with a stirring device, add water to the beaker, the amount of water added is 10 times that of the slag material containing elemental sulfur on a dry basis, after stirring for 30 minutes, filter and separate to obtain the main components: For filter cake A and filtrate A of elemental sulfur, continue to add sodium sulfite and water into the beaker containing filter cake A, the amount of sodium sulfite added is 1.1 times of the theoretical calculation amount, and the amount of water added is 15 times the weight of the slag material containing elemental sulfur , put the mixed solution beaker in a water bath, heat and stir for leaching at 80°C for 3.5 hours, detect that the pH of the solution is <7 and the solution is light yellow and transparent, continue to add sodium sulfite to adjust the pH of the solution to 7-8 and...

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Abstract

The invention relates to a production method of sodium thiosulfate pentahydrate. The method is characterized by comprising the following steps: (1) adding water into an elemental sulfur-containing slag material, stirring and washing, filtering and separating to obtain a filter cake A and filtrate A; (2) adding sodium sulfite and water into the filter cake A, wherein the adding amount of the sodium sulfite is 1.1-1.2 times of a theoretical value, and the adding amount of the water is 15-20 times of the mass of the sulfur-containing slag material; carrying out agitation leaching on an obtained mixture under the condition of heating; after that, filtering and washing to obtain a precious metal-containing filter cake B and filtrate B; evaporating the filtrate B, carrying out cooling crystallization and spillover, filtering and separating, and drying to obtain the sodium thiosulfate pentahydrate. After the production method is adopted, valuable elements are effectively recycled, and two products, i.e., the sodium thiosulfate pentahydrate and sodium sulfate are obtained.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a production method of sodium thiosulfate pentahydrate. Background technique [0002] The traditional method of producing sodium thiosulfate pentahydrate is to utilize high-purity sulfur and sodium sulfite raw materials, but this method has disadvantages such as requiring high raw material purity and high production costs. [0003] With the increasing production scale of non-ferrous hydrometallurgical industry, chlorine leaching slag, anode slime, and hot filter residue hydrometallurgy produce a large amount of elemental sulfur-containing slag, which contains a large amount of elemental sulfur and a small amount of precious metals , the contents are respectively in S 50-90%, Ag 22-109g / t, Au 37.3-59.25g / t, Pd 18.93-27.75g / t, Pt 23.70-35.74g / t. [0004] However, the utilization of sulfur in sulfide-containing and elemental sulfur-containing slag is single, and it is only ...

Claims

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Application Information

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IPC IPC(8): C01B17/64C01D5/00C01G53/04
CPCC01B17/64C01D5/00C01G53/04
Inventor 宫毅魏占鸿赵吉祥张凤娇贾苗
Owner JINCHUAN GROUP LIMITED
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