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Preparation method of high-activity potassium chloroplatinite

A potassium chloroplatinite, high-activity technology, applied in chemical instruments and methods, ruthenium/rhodium/palladium/osmium/iridium/platinum compounds, inorganic chemistry, etc., can solve problems such as shortening the preparation cycle and increase product activity , the effect of reducing precipitation

Active Publication Date: 2019-03-08
SHENYANG RES INST OF NONFERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the existing potassium chloroplatinite preparation method, to develop a new method that is simple and efficient, and has high purity and high platinum content in the potassium chloroplatinite product, and improves the traditional production through the selection of a new reducing agent. Insufficient technology, shorten the preparation cycle while improving the platinum content in potassium chloroplatinite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Take 200 g of chloroplatinic acid (platinum content ≥ 38.5%), add 21 g of reducing agent (mass ratio is hydrazine hydrochloride: hydrazine monohydrochloride: potassium oxalate = 6.5: 2.5: 1), and then add an appropriate amount of distilled water to dissolve completely. The internal temperature was 100°C, and the stirring speed of the system was 100 rpm. During the reaction, an appropriate amount of potassium chloride was added. After a reaction time of 90 minutes, it was concentrated, crystallized, and dried at 105°C for 2 hours to obtain the product potassium chloroplatinite.

[0011] The weight was weighed and assayed, the experimental results: the mass of potassium chloroplatinite: 152 g, the purity of potassium chloroplatinite: 99.5%, the content of platinum in potassium chloroplatinite: 47.3%.

Embodiment 2

[0013] Take 200 g of chloroplatinic acid (platinum content ≥ 38.5%), add 22 g of reducing agent (mass ratio is hydrazine hydrochloride: hydrazine monohydrochloride: potassium oxalate = 6.5: 2.5: 1), and then add an appropriate amount of distilled water to dissolve completely. The internal temperature is 120°C, the stirring speed of the system is 120 rpm; an appropriate amount of potassium chloride is added during the reaction process, and after a reaction time of 80 minutes, it is concentrated, crystallized, and dried at 105°C for 1.5 hours to obtain the product potassium chloroplatinite.

[0014] The weight was weighed and assayed, the experimental results: the mass of potassium chloroplatinite: 153 g, the purity of potassium chloroplatinite: 99.5%, the content of platinum in potassium chloroplatinite: 47.2%.

Embodiment 3

[0016] Take 200 g of chloroplatinic acid (platinum content ≥ 38.5%), add 23 g of reducing agent (mass ratio is hydrazine hydrochloride: hydrazine monohydrochloride: potassium oxalate = 6.5:2.5:1), and then add appropriate amount of distilled water to dissolve completely. In the reaction system, the temperature was 110°C, and the stirring speed of the system was 110 rpm; an appropriate amount of potassium chloride was added during the reaction, and after a reaction time of 85 minutes, it was concentrated, crystallized, and dried at 105°C for 2 hours to obtain the product potassium chloroplatinite.

[0017] The weight was weighed and assayed, the experimental results: the mass of potassium chloroplatinite: 151 g, the purity of potassium chloroplatinite: 99.6%, the platinum content of potassium chloroplatinite: 47.2%.

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Abstract

The invention discloses a preparation method of high-activity potassium chloroplatinite, and belongs to the field of noble metal metallurgy. Aiming at problems of the conventional preparation method of potassium chloroplatinite, a novel method which is simple, efficient, high in purity of potassium chloroplatinite purity and high in platinum content is developed, thereby overcoming deficiencies ofthe traditional production technology, improving the content of platinum in potassium chloroplatinite while shortening the preparation period through the selection of new reducing agent hydrazine hydrochloride, hydrazine monohydrochloride and potassium oxalate. The method can greatly reduce precipitated precipitate during reaction, and ensures the platinum content is increased to be greater than47.2 percent, and the product purity can reach greater than 99.5 percent.

Description

technical field [0001] The invention belongs to the field of precious metal metallurgy, in particular to a preparation method of highly active potassium chloroplatinite. Background technique [0002] Potassium chloroplatinite is commonly used in the preparation of noble metal catalysts and noble metal coatings, and is an important raw material for the preparation of other noble metal compounds and catalysts. At present, there are problems such as low reaction efficiency, long production process, and easy yellow precipitation during the wet preparation of potassium chloroplatinite. Therefore, the simplicity and high efficiency of potassium chloroplatinite preparation has become the top priority. Contents of the invention [0003] The purpose of the present invention is to solve the problems existing in the existing potassium chloroplatinite preparation method, to develop a new method that is simple and efficient, and has high purity and high platinum content in the potassiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G55/00
CPCC01G55/002C01P2006/80
Inventor 李岩松王大维王蓓王萍
Owner SHENYANG RES INST OF NONFERROUS METALS
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