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Method for preparing ruthenium trichloride with low-concentration complicated ruthenium-containing waste liquid

A ruthenium trichloride, low-concentration technology is applied in the field of preparing ruthenium trichloride from a low-concentration and complex ruthenium-containing waste liquid, which can solve the problems of shortened reaction time, many impurity elements, and low ruthenium enrichment rate, and achieves ruthenium enrichment. High efficiency, simple process and less distillation times

Active Publication Date: 2014-03-12
CHENZHOU GAOXIN MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the process of enriching ruthenium from low-concentration and complex ruthenium-containing waste liquid solves the shortcomings of complex process, high energy consumption, low ruthenium enrichment rate, many impurity elements and environmental pollution. The preparation of ruthenium trichloride adopts the method of chlorine gas and sodium hydroxide Production process improves product quality and shortens reaction times

Method used

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  • Method for preparing ruthenium trichloride with low-concentration complicated ruthenium-containing waste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Measure 100Kg of low-concentration complex ruthenium-containing waste liquid and add it to a 500L porcelain jar (the ruthenium content is 9.53‰ after analysis), slowly add 5Kg of hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid or two mixed acids under stirring, and then add A precipitating agent in 1906g ammonium sulfide, hydrazine hydrate, thiourea, sodium borohydride, sodium hydroxide, heated to boiling 1h to stop heating, diluted with water to 200L, unloaded, routinely filtered, washed, dried to obtain 1115g ruthenium slag ( After analyzing the ruthenium content 84.29%), the yield of ruthenium in the waste liquid is 98.62%.

[0016] Get 300g of ruthenium slag and put it into reactor a, add 1.5L mass fraction of 20–40% NaOH solution, add 2L deionized water to b and c, add RuO 4 Add 2.5L of 2–10mol / L hydrochloric acid and one or two mixtures of methanol, ethanol, n-propanol, and isopropanol to absorption bottles d, e, and f to keep the mass fraction at 0...

Embodiment 2

[0018] Measure 200Kg of low-concentration complex ruthenium-containing waste liquid and add it to a 500L porcelain jar (the ruthenium content is 7.79‰ after analysis), slowly add 22Kg of hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid or two mixed acids under stirring, and then add A precipitant in 4674g ammonium sulfide, hydrazine hydrate, thiourea, sodium borohydride, sodium hydroxide, heated to boiling 1h to stop heating, diluted with water to 400L, unloaded, routinely filtered, washed, dried to obtain 1797g ruthenium slag ( After analyzing the ruthenium content 86.32%), the yield of ruthenium in the waste liquid is 98.62%.

[0019] Get 300g ruthenium slag drop in reactor a, and add 1.8L mass fraction and be 30% NaOH solution, add 2L deionized water in b and c, add to RuO 4 Add 2.5L of 4mol / L hydrochloric acid and one or two mixtures of methanol, ethanol, n-propanol, and isopropanol to absorption bottles d, e, and f to keep the mass fraction at 0.5%, and add ...

Embodiment 3

[0021] Measure 150Kg of low-concentration complex ruthenium-containing waste liquid and add it to a 500L porcelain jar (the ruthenium content is 1.06% after analysis), slowly add 18Kg of hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid or two mixed acids under stirring, and then add A precipitating agent in 3975g ammonium sulfide, hydrazine hydrate, thiourea, sodium borohydride, sodium hydroxide, heated to boiling 1h to stop heating, diluted with water to 300L, unloaded, routinely filtered, washed, dried to obtain 1783g ruthenium slag ( After analyzing the ruthenium content 88.39%), the yield of ruthenium in the waste liquid is 99.12%.

[0022] Get 300g ruthenium slag drop in reactor a, and add 2L mass fraction and be 25% NaOH solution, add 2.5L deionized water to b, add to RuO 4 Add 2.5L of 4mol / L hydrochloric acid and one or two mixtures of methanol, ethanol, n-propanol, and isopropanol to absorption bottles c, d, e, and f to keep the mass fraction at 0.5%, and...

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Abstract

The invention provides a method for preparing ruthenium trichloride with low-concentration complicated ruthenium-containing waste liquid. The method comprises the steps that the low-concentration complicated ruthenium-containing waste liquid is subjected to acidification, selective ruthenium settlement and routine washing and drying; enriched ruthenium residues are obtained; the ruthenium residues are subjected to chlorine alkalization distillation, hydrochloric acid absorption, concentration and baking; and reagent-grade ruthenium trichloride is prepared. The method has the characteristics that a technology is simple; the energy consumption is low; a ruthenium enrichment rate is high; an impurity element reaches the standard; the distillation times are less; the reaction time is short; the product quality is easy to control; and a product yield is high.

Description

[0001] technical field [0002] The invention belongs to the field of fine chemical industry and relates to a method for preparing ruthenium trichloride from low-concentration complex ruthenium-containing waste liquid. Background technique [0003] Ruthenium trichloride is one of the most important compounds of ruthenium, and it is an important chemical raw material in the fields of heterogeneous catalysis, homogeneous catalysis, electroplating, and coating. Ruthenium trichloride is the main raw material for the metal anode coating of electrolytic cells. It has been produced in my country for more than 20 years. There are more than 30 electrolytic cell manufacturers in my country. Metal anodes have been used in chlor-alkali industry, inorganic electrosynthesis, organic electrosynthesis, metallurgy, etc. It is widely used in the field of electrochemistry, among which 95% of caustic soda by diaphragm method in the chlor-alkali industry is produced by using metal anode electroly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G55/00
Inventor 杨拥军雷涤尘叶咏祥冯志杰邓春玲杨静
Owner CHENZHOU GAOXIN MATERIAL
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