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Propane dehydrogenation Ptx-Sny binary alloy nano-catalyst and preparation method thereof

A nano-catalyst and binary alloy technology, which is applied in the direction of carbon compound catalyst, catalyst, metal/metal oxide/metal hydroxide catalyst, etc., to achieve the effect of improving conversion rate and improving stability

Active Publication Date: 2018-02-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in Al 2 o 3 All forms of Pt-Sn alloys on the support are possible

Method used

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  • Propane dehydrogenation Ptx-Sny binary alloy nano-catalyst and preparation method thereof
  • Propane dehydrogenation Ptx-Sny binary alloy nano-catalyst and preparation method thereof

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preparation example Construction

[0028] The invention provides a propane dehydrogenation Pt x -Sn y The preparation method of binary alloy nano catalyst:

[0029] Using Pt precursor solution, Sn precursor and hydroxyl donor as reaction raw materials, Pt and Sn metal carbonyl compounds are prepared through carbonylation reaction; then the Pt and Sn metal carbonyl compounds are sequentially loaded, decarbonylated, washed and Drying treatment to obtain the Pt x -Sn y Binary alloy nanocatalysts.

[0030] Specifically include the following steps:

[0031] S101: select a preset solvent, configure a Pt precursor solution, then add a Sn precursor and a hydroxyl donor into the Pt precursor solution, and stir evenly. Wherein, the Pt precursor includes one or more of sodium chloroplatinate, chloroplatinic acid, potassium chloroplatinate, and hexahydroxyplatinic acid bis(ethanolamine); the Sn precursor includes SnCl 4 and / or SnCl 2 The hydroxyl donor includes one or more of sodium citrate, sodium formate, sodium a...

Embodiment 1

[0040] The invention provides a propane dehydrogenation Pt x -Sn y The preparation method of binary alloy nano-catalyst comprises the following steps:

[0041] S101: Add 0.01mol / L sodium chloroplatinate methanol solution to a 100mL three-neck flask, weigh 0.034mmol of SnCl 4 And 1.360mmol of sodium acetate into the three-necked flask. Seal the top of the condenser tube and apply vacuum grease evenly on its lower part, and connect it to the mouth of the middle flask.

[0042] S102: After the system is sealed, after repeated vacuum pumping and nitrogen filling, CO gas is introduced into the three-necked flask under magnetic stirring, the magnetic stirrer speed is adjusted to 900r / min, and the carbonylation reaction is carried out at a temperature of 50°C for 24 hours to obtain Pt-Sn carbonyl compound alcohol solution.

[0043] S103: Add 4g of Al to the dipping bottle 2 o 3 The carrier and the methanol solution were repeatedly vacuumed and filled with nitrogen, and then pla...

Embodiment 2

[0049] This embodiment is set up on the basis of the first embodiment; except step S103, other steps are the same as the first embodiment.

[0050] Specifically, S103: Add 0.2 g of Al to the dipping bottle 2 o 3 The carrier and the methanol solution were repeatedly vacuumed and filled with nitrogen, and then placed in an ultrasonic device for ultrasonic vibration treatment for 1 hour. Then add the Pt obtained by S102 x -Sn y Carbonyl compound alcohol solution, stirring at room temperature for 12h, rotating speed 1000r / min, to obtain the supported carbonyl Pt x -Sn y / Al 2 o 3 Alcoholic solution.

[0051] This embodiment finally prepares Pt with a Pt loading of 10% (mass fraction). 3 Sn / Al 2 o 3 catalyst. The sample obtained in Example two is characterized by X-ray diffraction, and the results are as follows: figure 2 shown. Depend on figure 2It can be seen that the characteristic diffraction angles 2θ of XRD are 38.9, 45.3, and 65.9°, respectively representing ...

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Abstract

The invention relates to a propane dehydrogenation Ptx-Sny binary alloy nano-catalyst and a preparation method thereof. The preparation method includes: taking a Pt precursor solution, a Sn precursorand a hydroxyl donor as the reaction raw materials, carrying out carbonylation reaction to obtain a Pt, Sn carbonyl metal compound; then carrying out loading, decarbonylation, washing and drying treatment on the Pt, Sn carbonyl metal compound in order to obtain the Ptx-Sny binary alloy nano-catalyst. According to the invention, by controlling the type and proportion of Pt and Sn precursors, the hydroxyl donor type and dosage, carbonylation temperature, decarbonylation temperature and mode and other conditions in the reaction process, the Ptx-Sny binary alloy nano-catalyst with the characteristics of small size, uniform distribution and high purity can be obtained finally. In addition, the preparation method provided by the invention has the advantages of simple process, easy implementationand low cost, and the catalyst has the advantages of excellent conversion rate, selectivity and stability, and significant technological and economical effects, thereby having broad application value.

Description

technical field [0001] The invention relates to the technical field of industrial catalysis, in particular to a propane dehydrogenation Ptx-Sny binary alloy nano catalyst and a preparation method thereof. Background technique [0002] As an important petrochemical basic raw material, propylene is not only used for the production of polypropylene, but also the main raw material for products such as propylene oxide, acrylonitrile, acrylic acid and isopropanol. In recent years, with the increase in demand for derivatives such as polypropylene, the demand for propylene has also increased year by year. However, the main source of propylene in my country is still the by-products of naphtha cracking to ethylene and catalytic cracking process of petroleum processing. Due to the limitation of refining capacity, the supply of propylene is gradually showing a tense situation. [0003] As a special technology for producing propylene, propane dehydrogenation has high economic benefits a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/62C07C5/333C07C11/06
CPCB01J23/626C07C5/3337C07C2523/62C07C11/06Y02P20/52
Inventor 马占华李军安长华李帅姜爱晶孙兰义
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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