Novel precursor compound for preparing platinum-carrying catalyst and synthetic method thereof

A platinum catalyst and compound technology, applied in the field of new precursor compound [Pt4]X2 and its preparation, can solve the problems of poor adsorption effect and poor compound exchange effect [Wang Shangdi, reducing the high temperature resistance and service life of platinum catalysts and so on] , to achieve the effect of simple operation and easy control

Inactive Publication Date: 2008-09-03
KUNMING INST OF PRECIOUS METALS
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Problems solved by technology

However, many experiments have found that a small amount of chlorine will reduce the high temperature resistance and service life of platinum catalysts, and the source of chlorine in the catalyst is mainly the use of chlorine-containing precursor compounds
At the same time, the surface of many catalyst supports is negatively charged, for example: Al 2 o 3 and other oxides will form a layer of hydrated oxide Al(OH) 3 and AlO(OH), converted to Al(OH) in alkaline impregnation environment 4 - and AlO 2 - [D.K.Paul, C.M.Marten, langmuir

Method used

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  • Novel precursor compound for preparing platinum-carrying catalyst and synthetic method thereof
  • Novel precursor compound for preparing platinum-carrying catalyst and synthetic method thereof
  • Novel precursor compound for preparing platinum-carrying catalyst and synthetic method thereof

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Embodiment Construction

[0011] (1) Intermediate cis-[Pt(NH 3 ) 2 I 2 ]preparation

[0012] Take 30.Og (72.3mmol) K 2 PtCl 4 Dissolve in 250ml of water, add 72g (434mmol) KI, stir and react at 30-40°C in the dark for 4 hours, then add 1:1 NH 3 ·H 2 O 50ml precipitated yellow cis-[Pt(NH 3 ) 2 I 2 ]precipitation. Filter, wash with water and ethanol respectively, and dry at 70°C to obtain 34.5 g of the product with a yield of 97.8%.

[0013] (2)[Pt(NH 3 ) 4 ]C 2 o 4 Synthesis

[0014] Take 10g (20.7mol) of cis-[Pt(NH3)2I2], suspend in 200ml of water, add 7.03g (41.3mmol) of silver nitrate solution, and stir at 45-50°C for 8 hours with closed light. After checking the completion of the reaction, filter Remove the AgI precipitate. Add 4.2g (22.8mmol) K to the mother liquor 2 C 2 o 4 ·H 2 O solution, stirred at room temperature for reaction 4, and white cis-[Pt(NH 3 ) 2 C 2 o 4 ]precipitation. Separated by filtration, washed with water, added NH 3 ·H 2 O until cis-[Pt(NH 3 ) 2 C...

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Abstract

The invention relates to new type precursor compounds for preparing platinum carrying catalyst [Pt(NH3)4]X2(X2=oxalate, malonate and 1, 1-cyclobutanes dicarboxylate), and a method for making same. The compounds can provide complex cation [Pt(NH3)4]<2+>, is propitious to perform high-performance catalyst on carrier or sodium-typed molecular sieve for adsorbing and exchanging electrified negativity. The preparation of the compounds uses K2PtCl4 as starting material to obtain the intermediate body cis-[Pt(NH3)2I2] by iodination and ammine substitution, and then to obtain the target compounds after hydration, coordination and ammine displacement, and the yield can reach 90.

Description

technical field [0001] The present invention relates to a class of novel precursor compounds [Pt(NH 3 ) 4 ]X 2 (X 2 = oxalate, malonate and 1,1-cyclobutane dicarboxylate) and a preparation method thereof, belonging to the field of chemical catalysis. Background technique [0002] Platinum-supported catalysts are important catalysts for a class of heterogeneous reactions, and have been widely used in various fields such as petrochemicals, organic synthesis, automobile manufacturing, and environmental governance. At present, the commonly used carrier materials are mainly Al 2 o 3 , SiO 2 、TiO 2 , rare earth oxides, activated carbon, molecular sieves, etc., such as Pt-Re / Al catalysts for petroleum reforming reactions 2 o 3 , Automobile exhaust gas purification catalyst Pt-Pd-Rh / Al 2 o 3 , Organic wastewater oxidation purification catalyst Pt-Pd / TiO 2 [Chinese Mechanical Engineering Society, Editor-in-Chief of China Materials Research Society, China Materials Enginee...

Claims

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Application Information

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IPC IPC(8): C07F15/00C07C55/02
Inventor 刘伟平潘再富余尧叶青松谌喜珠沈善问
Owner KUNMING INST OF PRECIOUS METALS
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