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Novel method for synthesis of tetrammine platinum hydrogen nitrate (II)

A technology of tetraammine platinum nitrate and platinum diiodide diammine, applied in chemical instruments and methods, ruthenium/rhodium/palladium/osmium/iridium/platinum compounds, inorganic chemistry, etc., can solve high cost, expensive, The problem of poor economic feasibility and other problems, to achieve the effect of high yield and simple operation

Inactive Publication Date: 2009-02-18
KUNMING INST OF PRECIOUS METALS
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Problems solved by technology

So the intermediate [Pt(NH 3 ) 2 Cl 2 ] including cis- and trans-[Pt(NH 3 ) 2 Cl 2 ] The price is very expensive, through [Pt(NH 3 ) 2 Cl 2 ] intermediate synthesis [Pt(NH 3 ) 4 ](NO 3 ) 2 The cost is quite high and the economic feasibility is poor

Method used

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  • Novel method for synthesis of tetrammine platinum hydrogen nitrate (II)
  • Novel method for synthesis of tetrammine platinum hydrogen nitrate (II)
  • Novel method for synthesis of tetrammine platinum hydrogen nitrate (II)

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Embodiment Construction

[0013] (1) cis-[Pt(NH 3 ) 2 I 2 ] Preparation of intermediate

[0014] Weigh 100g K 2 PtCl 4 (241mmol) was dissolved in 500ml of water, and the insolubles were removed by filtration. At 45°C, 200ml of an aqueous solution containing KI 240g (1.45mol, excess 50%) was slowly added, and after 4 hours of reaction in the dark, 1:1 ammonia water (excess 30%), a yellow precipitate was obtained, left for 2 hours, collected by filtration, washed with water and ethanol respectively, and then vacuum-dried at 60-70°C for 4 hours to obtain cis-[Pt(NH 3 ) 2 I 2 ] 112 g, yield 96%, platinum content 39.7% (calculated value 40.4%).

[0015] (2)[Pt(NH 3 ) 4 ](NO 3 ) 2 Synthesis

[0016] Weigh 100g of cis-[Pt(NH 3 ) 2 I 2 ] (207mmol), suspended in 500ml of water, added equivalent silver nitrate 70.3g (414mmol), stirred and reacted at 45°C for 5 hours, checked that the reaction was complete, filtered to remove the AgI precipitate, and the mother liquor was freeze-dried to nearly dry...

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Abstract

The invention relates to a novel process for synthesizing the tetraammineplatinum (II) nitrate, and comprises the following steps: (1) K2PtCl4 is reacted with KI and ammonia to generate the intermediate body of the maleinoid-form diiododiammine platinum; (2) the intermediate body is reacted with silver nitrate to get the hydrate nitrate maleinoid-form-dihydrate-diamminine platinum; (3) the hydrate is reacted with strong aqua ammonia to get the target product of the tetraammineplatinum (II) nitrate. The productivity of the method is high (more than 90 percent); the purity of the product can reach 99.0 percent (calculating at metal platinum); the operation is simple and is easy to be controlled; the production cost is low, thereby being applicable to the mass production.

Description

technical field [0001] The invention relates to a novel synthesis process of an important platinum complex-tetraammine platinum (II) nitrate, belonging to the field of chemistry and chemical engineering. Background technique [0002] Tetraammine platinum (II) nitrate ([Pt(NH 3 ) 4 ](NO 3 ) 2 ) is an important platinum compound, which has good water solubility, relatively stable solution chemical properties, and can directly obtain metal platinum when decomposed by heat. It is an ideal precursor compound for preparing platinum-supported catalysts. For example, [Pt(NH 3 ) 4 ](NO 3 ) 2 Used as a precursor compound to prepare highly active Pt / C and Pt / SiO 2 Catalyst (Sobczak I., Ziolek M., Nowacka M., Microporous and Mesoporous Materials, (2005), 78 (2-3), 103-116; Shih Cheng-Chieh Chang Jen-Ray, Materials Chemistry and Physics, (2005), 92 (1), 89-97. Meanwhile, [Pt(NH 3 ) 4 ](NO 3 ) 2 As an intermediate, synthesize various platinum compounds. For example, [Pt(NH ...

Claims

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Application Information

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IPC IPC(8): C01G55/00
Inventor 谌喜珠刘伟平叶青松余尧常桥稳
Owner KUNMING INST OF PRECIOUS METALS
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