Method for preparing potassium trichloroplatinate by ultrasonic method

A technology of potassium trichloro-ammineplatinate and ultrasonic method, applied in chemical instruments and methods, ruthenium/rhodium/palladium/osmium/iridium/platinum compounds, inorganic chemistry, etc., can solve the problems of low direct yield, To achieve the effect of improving the direct yield

Active Publication Date: 2021-01-29
SHENYANG RES INST OF NONFERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the problems of platinum precipitation and low direct yield caused by too long synthesis process, the present invention refines the particle size of potassium chloroplatinate and pretreats it with acidification; puts the entire reaction system in an ultrasonic field to synthesize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 10 g of potassium chloroplatinite was ball-milled at 200 rpm for 10 min, and soaked in 200 mL of HCl at 80 °C for 10 min. Filter and dissolve the pretreated potassium chloroplatinite in 110 mL of water. The potassium chloroplatinite aqueous solution was placed in a 250 W ultrasonic field and vibrated for 10 min, heated to 60 °C during the oscillation, and 25 mL of 20% ammonium acetate aqueous solution was added to raise the system temperature to 100 °C. Continue to vibrate for 20 min, and filter to obtain potassium trichloro-ammineplatinate. Add 2.5 g Pt(NH 3 ) 4 Cl 2 , generating [Pt(NH 3 ) 4 ][PtCl 4 ] precipitated, filtered and dried at 80°C. Then mix it with an equimolar amount of potassium chloroplatinite, grind until green, dissolve in cold water, and grind again. Afterwards, the product trichloro-ammonia potassium platinumate is bottled and tested.

[0045] Results: The direct yield of potassium trichloro-ammineplatinate was 71.5%; the total yield of pot...

Embodiment 2

[0047] 8 g of potassium chloroplatinite was ball-milled at 230 rpm for 12 min, and soaked in 150 mL of HCl at 85 °C for 12 min. Filter and dissolve the pretreated potassium chloroplatinite in 100 mL of water. The potassium chloroplatinite aqueous solution was placed in a 280 W ultrasonic field and vibrated for 10 min, heated to 70 °C during the oscillation, and 20 mL of 20% ammonium acetate aqueous solution was added to raise the system temperature to 110 °C. Continue to vibrate for 25 min, and filter to obtain potassium trichloro-ammineplatinate. Add 2 g Pt(NH 3 ) 4 Cl 2 , generating [Pt(NH 3 ) 4 ][PtCl 4 ] precipitated, filtered and dried at 90°C. Then mix it with an equimolar amount of potassium chloroplatinite, grind until green, dissolve in cold water, and grind again. Afterwards, the product trichloro-ammonia potassium platinumate is bottled and tested.

[0048] Results: The direct yield of potassium trichloro-ammineplatinate was 73%; the total yield of potassiu...

Embodiment 3

[0050]20 g of potassium chloroplatinite was ball-milled at 250 rpm for 15 min, and soaked in 250 mL of HCl at 95 °C for 15 min. Filter and dissolve the pretreated potassium chloroplatinite in 150 mL of water. The potassium chloroplatinite aqueous solution was shaken in a 300 W ultrasonic field for 15 min, heated to 75 °C during the shaking, and 45 mL of 25% ammonium acetate aqueous solution was added to raise the system temperature to 120 °C. Continue to vibrate for 30 min, and filter to obtain potassium trichloro-ammineplatinate. Add 1.8 g Pt(NH 3 ) 4 Cl 2 , generating [Pt(NH 3 ) 4 ][PtCl 4 ] precipitated, filtered and dried at 90°C. Then mix it with an equimolar amount of potassium chloroplatinite, grind until green, dissolve in cold water, and grind again. Afterwards, the product trichloro-ammonia potassium platinumate is bottled and tested.

[0051] Results: The direct yield of potassium trichloro-ammineplatinate was 75%; the total yield of potassium trichloro-amm...

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PUM

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Abstract

The invention belongs to the field of precious metal metallurgy, and particularly relates to a method for preparing trichloromonoammine potassium platinate through an ultrasonic method. The preparation method comprises the following steps: carrying out ball milling on potassium chloroplatinite, soaking with a proper amount of HCl, filtering, and dissolving pretreated potassium chloroplatinite in water for later use; placing the obtained potassium chloroplatinite aqueous solution in an ultrasonic field to be oscillated, heating during oscillation, adding an ammonium acetate aqueous solution, increasing the temperature of the system, and performing continuous oscillation continues for 20-30 min; filtering to obtain directly recovered potassium trichloroplatinate, and reserving the filtrate for later use; adding Pt (NH3) 4Cl2 into the filtrate to generate a [Pt (NH3) 4][PtCl4] precipitate, filtering and drying the [Pt(NH3)4][PtCl4] precipitate; drying, mixing with potassium chloroplatinite, grinding to green, dissolving in cold water, and grinding. According to the preparation method provided by the invention, the potassium chloroplatinate is subjected to particle size refining and acidification pretreatment, and the whole reaction system is synthesized in an ultrasonic field, so that the direct yield, the total yield and the content of the potassium trichloroplatinate are improved, and the preparation method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of precious metal metallurgy, and in particular relates to a method for preparing potassium trichloro-ammine platinum by an ultrasonic method. Background technique [0002] Potassium trichloroammoniaplatinate is often used in the synthesis of platinum compounds, industrial catalysis and other fields. In the prior art, the preparation method of potassium trichloro-ammineplatinate has problems such as easy precipitation of platinum during the preparation process, low direct yield, long preparation period and the like. The direct yield of potassium chloroplatinite and ammonium acetate in the existing method is relatively low, resulting in a long reaction process of the subsequent filtrate, and the whole reaction yield is only about 50%. Contents of the invention [0003] In order to solve the problems in the prior art, the object of the present invention is to provide a method for preparing potassium trichloroamminepl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G55/00
CPCC01G55/002
Inventor 王大维李岩松徐飞飞王萍王蓓
Owner SHENYANG RES INST OF NONFERROUS METALS
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