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Method for preparing platinum nitrate solution by synergism of molten salt method and ultrasound

A technology of platinum nitrate and molten salt method, applied in chemical instruments and methods, ruthenium/rhodium/palladium/osmium/iridium/platinum compounds, inorganic chemistry, etc. It can solve the problems of environmental pollution and other problems, so as to achieve the effect of easy control of the preparation process, simple process flow and easy industrialization.

Inactive Publication Date: 2019-11-08
云南省环境科学研究院(中国昆明高原湖泊国际研究中心)
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In summary, the platinum nitrate solutions prepared by these existing methods all have unstable valence states of platinum ions, which lead to product precipitation and low yields. Nitrogen oxides pollute the environment, and the production process uses conventional washing methods to remove impurities such as sodium ions and chloride ions, making the removal rate limited

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  • Method for preparing platinum nitrate solution by synergism of molten salt method and ultrasound

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Effect test

Embodiment 1

[0025] Embodiment 1: The method for preparing platinum nitrate solution in cooperation with ultrasound of this molten salt method, such as figure 1 As shown, the specific steps are as follows:

[0026] (1) Chlorination of sponge platinum medium-temperature molten salt to generate sodium chloroplatinate: mix 300 g of commercially available platinum sponge powder with a purity greater than 99.95% and 900 g of industrial sodium chloride at a mass ratio of 1:3, and then mix the mixed material Put it into a quartz boat and put it into a tube furnace to heat to 450°C, then introduce chlorine gas at a flow rate of 65mL / min, turn off the chlorine gas after 4 hours, cool to room temperature, and take it out to obtain sodium chloroplatinate powder;

[0027] (2) Hydrolysis to generate sodium hexahydroxyplatinate: Dissolve 750g of analytically pure sodium hydroxide in 5000mL of ultrapure water to prepare a sodium hydroxide solution with a mass fraction of 13.04%. The mass ratio of sodium...

Embodiment 2

[0032] Embodiment 2: the method for the ultrasonic coordinated preparation of platinum nitrate solution by the molten salt method, such as figure 1 As shown, the specific steps are as follows:

[0033] (1) Chlorination of sponge platinum medium-temperature molten salt to generate sodium chloroplatinate: mix 1000g of commercially available platinum sponge powder with a purity greater than 99.95% and 2500g of industrial sodium chloride at a mass ratio of 1:2.5, and then mix the mixed material Put in a quartz boat and put it into a tube furnace to heat to 580°C, then introduce chlorine gas at a flow rate of 85mL / min, and then turn off the chlorine gas after feeding chlorine gas for 3 hours, and take it out after cooling to room temperature to obtain sodium chloroplatinate powder;

[0034](2) Hydrolysis to generate sodium hexahydroxyplatinate: Dissolve 2000g of analytically pure sodium hydroxide in 25000mL of ultrapure water to prepare a sodium hydroxide solution with a mass frac...

Embodiment 3

[0039] Embodiment 3: the method for preparing platinum nitrate solution in cooperation with the molten salt method ultrasonically, such as figure 1 As shown, the specific steps are as follows:

[0040] (1) Chlorination of sponge platinum medium-temperature molten salt to generate sodium chloroplatinate: mix 1000g of commercially available platinum sponge powder with a purity greater than 99.95% and 1000g of industrial sodium chloride at a mass ratio of 1:1, and then mix the mixed material Put in a quartz boat and put it into a tube furnace to heat to 300°C, then introduce chlorine gas at a flow rate of 75mL / min, and then cut off the chlorine gas after 0.5h of chlorine gas introduction, and take it out after cooling to room temperature to obtain chloroplatinic acid sodium powder;

[0041] (2) Hydrolysis to generate sodium hexahydroxyplatinate: Dissolve 1000g of analytically pure sodium hydroxide in 19000mL of ultrapure water to prepare a sodium hydroxide solution with a mass f...

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Abstract

The invention discloses a method for preparing a platinum nitrate solution by synergism of a molten salt method and ultrasound. The method includes the following steps chlorinating a sponge platinum intermediate temperature molten salt to form sodium chloroplatinate, hydrolyzing to form sodium hexahydroxyplatinate, precipitating to obtain hydroxyplatinic acid, ultrasonically washing synergistically, and synthesizing platinum nitrate to prepare the platinum nitrate solution. In a preparation process, the preparation process is simpler without removing nitrate, the preparation process is stablein reaction, the product yield is high, residues of impurity ions such as sodium ions and chloride ions are controlled in an obtained product, the process flow of the method is simple, a synthesis process does not need to remove the nitrate, a synthesis process is stable in reaction, the yield of finished products is high, the content of the impurities is low, especially the content of the sodiumion and the chloride ion is less than 50 ppm, and industrialization is easy.

Description

technical field [0001] The invention relates to a method for jointly preparing a platinum nitrate solution by a molten salt method and ultrasound, and belongs to the technical field of the preparation process of chlorine-free platinum inorganic compounds. Background technique [0002] Platinum-containing inorganic compounds are important catalyst precursors, which are widely used in industrial production such as petroleum cracking catalysts, environmental treatment catalysts, fine chemical catalysts, and electroplating. However, residual impurities in the precursors, especially chloride ions and sodium ions Seriously affect the overall performance of the catalyst, so the preparation of chlorine-free platinum nitrate compound is a catalyst precursor product that is very popular in the market. At present, the preparation of platinum nitrate in the prior art (such as US patent document US3666412) is mainly to dissolve platinum dichloride in nitric acid solution, and obtain plat...

Claims

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Application Information

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IPC IPC(8): C01G55/00
CPCC01G55/00
Inventor 吴文卫赵海光贺洪亮杨子轩毕廷涛
Owner 云南省环境科学研究院(中国昆明高原湖泊国际研究中心)
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