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Method for preparing ruthenium trichloride from ruthenium-containing waste

A technology of ruthenium trichloride and waste materials, which is applied in the field of preparing ruthenium trichloride, can solve the problems of high equipment cost, poor safety, and large consumption, and achieve fast reaction rate, good safety, and high conversion rate Effect

Active Publication Date: 2019-09-20
JIANGXI HANS PRECIOUS METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the method (1), pure ruthenium powder is used as the raw material, and the sodium hypochlorite used generally exists in the form of a solution, which has a large consumption, high cost, slow reaction speed, and low yield; a large amount of chlorine gas is required in the method (2), and chlorine gas is highly toxic Gas, there are great safety hazards in the production process; method (3) requires reaction at high temperature, high equipment cost and high energy consumption
[0004] The above preparation method of ruthenium trichloride has the problems of low reaction efficiency, high energy consumption, and poor safety, and most of them require relatively high-purity ruthenium powder as a raw material, which further increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, prepares ruthenium trichloride with ruthenium carbon catalyst recovery waste material, comprises the following steps:

[0021] (1) Roasting: Take 1000kg of ruthenium carbon catalyst to recycle waste, in which the ruthenium content is 0.24%, and roast it at 200°C, 400°C, and 800°C for 2 hours, and pass it into nitrogen protection to obtain 10.25kg of roasted material , wherein the ruthenium content is 23.35%;

[0022] (2) Preparation of RuO 4 : Roasting material is added in the reaction kettle, then add 11.50kg sodium chlorate, 0.14kg liquid bromine and 12.00kg water, stir reaction under 100 ℃ of conditions, react 1.5h, wherein the described roasting material in parts by weight Ruthenium content: sodium chlorate: liquid bromine: water is 100:480:6:500;

[0023] (3) Preparation of H 2 RuCl 5 Solution: absorb the RuO produced by the reaction with a 5-grade hydrochloric acid bottle at room temperature 4 , that is, get H 2 RuCl 5 solution;

[0024] (4) ...

Embodiment 2

[0026] Embodiment 2, prepares ruthenium trichloride with ruthenium alumina catalyst recovery waste material, comprises the following steps:

[0027] (1) Roasting: Take 500kg of ruthenium alumina catalyst to recycle waste, in which the ruthenium content is 1.39%, and roast it at 200°C, 400°C, and 800°C for 2 hours, and pass through nitrogen protection to obtain 129.89kg of roasted material , the ruthenium content is 5.35%;

[0028] (2) Preparation of RuO 4 Roasting material is added in the reactor, then add 38.23kg sodium chlorate, 0.28kg liquid bromine and 55.60kg water, stir reaction under 60 ℃ of conditions, react 5h, wherein said roasting material by weight part contains The amount of ruthenium: sodium chlorate: liquid bromine: water is 100:550:4:800;

[0029] (3) Preparation of H 2 RuCl 5 Solution: absorb the RuO produced by the reaction with a 5-grade hydrochloric acid bottle at room temperature 4 , that is, get H 2 RuCl 5 solution;

[0030] (4) Drying: the genera...

Embodiment 3

[0032] Embodiment 3, prepare ruthenium trichloride with the aqua regia insoluble slag containing ruthenium waste after having extracted platinum, palladium, comprise the following steps:

[0033] (1) Roasting: Take 50kg of ruthenium-containing waste in aqua regia insoluble slag after extracting platinum and palladium, in which the ruthenium content is 34.81%, and roast it at 200°C, 400°C, and 800°C for 2 hours, and pass it into Nitrogen protection, obtain roasting material 46.31kg, ruthenium content is 37.57%;

[0034] (2) Preparation of RuO 4 : Roasting material is added in the reactor, then add 34.80kg sodium chlorate, 0.52kg liquid bromine and 104.40kg water, stir reaction under 80 ℃ of conditions, react 3h, wherein said roasting material by weight part contains The amount of ruthenium: sodium chlorate: liquid bromine: water is 100:200:3:600;

[0035] (3) Preparation of H 2 RuCl 5 Solution: Absorb the RuO produced by the above reaction with a 5-grade hydrochloric acid b...

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Abstract

The invention relates to a method for preparing ruthenium trichloride from ruthenium-containing waste. The method is characterized by comprising the following steps: (1) roasting: enabling the ruthenium-containing waste to be roasted, wherein roasting temperature is 200-800 DEG C, and roasting time is 4-8h; (2) preparation of RuO4: enabling the roasted ruthenium-containing waste to be added into a reaction kettle, then adding sodium chlorate, liquid bromine and water, stirring to react in a condition of 60-100 DEG C, and reacting for 1.5-5h, wherein the proportion of the ruthenium-containing quantity of the ruthenium-containing waste to the sodium chlorate to the liquid bromine to the water is 100 to (150-550) to (2-6) to (300-800) in parts by ewight; (3) preparation of an H2RuCl5 ;absorbing RuO4 generated via reaction in the step (2) by adopting hydrochloric acid at normal temperature to obtain the H2RuCl5 solution; and (4): drying: enabling the generated H2RuCl5 solution to be heated and concentrated to crystallize, and then carrying out infrared drying to obtain a hydrated ruthenium trichloride crystal. The method has the characteristics of fast reaction rate, high conversion rate, good safety, low energy consumption and the like.

Description

technical field [0001] The invention belongs to the technical field of precious metal recovery, and in particular relates to a method for preparing ruthenium trichloride from waste materials containing ruthenium. Background technique [0002] Ruthenium trichloride is an important inorganic substance, which can react with many reagents to form a variety of complexes, and is also the starting material for preparing many ruthenium complexes. Ruthenium trichloride can be used for heterogeneous catalysis or homogeneous catalysis, It can be used as a catalyst for polymerization, isomerization, hydrogenation and other reactions of many organic substances. Ruthenium trichloride can also be used as an important chemical raw material in electroplating, electrolysis anode, and electronics industry. [0003] The use of ruthenium trichloride is very extensive, and the method for preparing ruthenium trichloride at present has the following several kinds: (1) Document " sodium hypochlorite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G55/00
CPCC01G55/005
Inventor 丁国栋郁丰善相亚波杨定宁谢斌郝新宇
Owner JIANGXI HANS PRECIOUS METALS CO LTD
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