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Method for continuous crystallization of rhodium trichloride

A technology of rhodium trichloride and rhodium chloride is applied in chemical instruments and methods, inorganic chemistry, ruthenium/rhodium/palladium/osmium/iridium/platinum halide, etc. Instability, metal loss and other problems, to achieve the effect of good acid solubility, good water solubility, good water solubility and low cost

Active Publication Date: 2018-08-10
昆明铂磊科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional production process, due to the relatively long process and many production steps, metal loss will be caused, and at the same time, the product batch will be unstable, the crystal particles of the product will be uneven, and the cost will be high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Add a compounding agent to the acid-soluble rhodium chloride solution to adjust the concentration and acidity, so that the concentration is 30g / L and the pH value is 0.5 to obtain a high-concentration rhodium chloride solution; it can make it crystallize in the later stage Perform rapid dehydration to achieve good consistency of the product and good crystal uniformity of the product;

[0022] The preparation agent is a mixture of acetone, hydrogen peroxide and deionized water in a mass ratio of 1:2:7;

[0023] Among them, the acid-soluble rhodium chloride solution is prepared according to the following operations: first, rhodium powder and sodium chloride are mixed in a mass ratio of 1:1, and chlorine gas is introduced at 600°C for medium-temperature chlorination for 40 minutes, and then the chloride Good rhodium is completely dissolved in water to obtain sodium chlororhodium acid solution, and the sodium chlororhodium acid solution is hydrolyzed to a pH value of 8,...

Embodiment 2

[0028] (1) Add a compounding agent to the acid-soluble rhodium chloride solution to adjust the concentration and acidity, so that the concentration is 40g / L and the pH value is 0.5 to obtain a high-concentration rhodium chloride solution; it can make it crystallize in the later stage Perform rapid dehydration to achieve good consistency of the product and good crystal uniformity of the product;

[0029] The preparation agent is a mixture of acetone, hydrogen peroxide and deionized water in a mass ratio of 1:2:7;

[0030] Among them, the acid-soluble rhodium chloride solution is prepared according to the following operations: first, rhodium powder and sodium chloride are mixed in a mass ratio of 1:1, and chlorine gas is introduced at 600°C for moderate temperature chlorination for 50 minutes, and then the chloride Good rhodium is completely dissolved in water to obtain sodium chlororhodium acid solution, and the sodium chlororhodium acid solution is hydrolyzed to a pH value of ...

Embodiment 3

[0035] (1) Add a compounding agent to the acid-soluble rhodium chloride solution to adjust the concentration and acidity, so that the concentration is 40g / L and the pH value is 0.5 to obtain a high-concentration rhodium chloride solution; it can make it crystallize in the later stage Perform rapid dehydration to achieve good consistency of the product and good crystal uniformity of the product;

[0036] The preparation agent is a mixture of acetone, hydrogen peroxide and deionized water in a mass ratio of 1:2:7;

[0037] Among them, the acid-soluble rhodium chloride solution is prepared according to the following operations: first, rhodium powder and sodium chloride are mixed in a mass ratio of 1:1, and chlorine gas is introduced at 600°C for medium-temperature chlorination for 60 minutes, and then the chloride Good rhodium is completely dissolved in water to obtain sodium chlororhodium acid solution, and the sodium chlororhodium acid solution is hydrolyzed to a pH value of 8,...

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PUM

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Abstract

The invention discloses a continuous crystallization method of rhodium trichloride. The continuous crystallization method comprises steps as follows: a blending agent is added to an acid-soluble rhodium chloride solution for adjusting concentration and acidity, and a rhodium chloride solution with high concentration is obtained; the rhodium chloride solution with the high concentration is subjected to spray drying, and rhodium trichloride is obtained. Rhodium trichloride is good in acid solubility and water solubility, stable in product performance and good in consistency, has stable rhodium content, realizes uniform product particles and meets use requirements of catalyst precursors. With the adoption of the continuous crystallization method of rhodium trichloride, continuous production can be realized, the process is simple, the production cycle is short, environmental pollution is avoided, a productive-processing technique realizing reduction of metal loss is adopted, the production loss caused by the long production process is reduced, a precursor material which is more reliable and more convenient to use is provided for the rhodium catalyst industry, an industrial chain of the rare and precious metal industry is extended, market vacancy is filled up, and industrial development is promoted.

Description

technical field [0001] The invention relates to a method for continuous crystallization of rhodium trichloride, which belongs to the technical field of metal sorting. Background technique [0002] With the continuous development of my country's manufacturing level, the requirements for the selectivity, stability and catalytic activity of rhodium catalysts are also increasing. At present, the rhodium compound products commonly used as precursors are mainly rhodium trichloride, rhodium acetate, and rhodium iodide. This product is widely used in the field of catalytic hydrogenation and electrocatalysis in petrochemical industry, pharmaceutical industry, spice industry, environmental protection wastewater, waste gas, automobile exhaust purification and other fine chemicals. At present, the amount of rhodium catalyst in China has reached 10 tons in equivalent rhodium / year. Industrial rhodium catalysts can be divided into two categories, one is homogeneous catalysts, that is, v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G55/00
CPCC01G55/005
Inventor 李雄魏晓晖郑恩华张维峰阮波
Owner 昆明铂磊科技有限公司