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A kind of rhodium/phosphorene supported catalyst and its preparation method and application

A supported catalyst, phosphorene technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as complex preparation process, achieve high catalytic activity, high hydrogenation degree, preparation Simple and convenient method

Active Publication Date: 2021-07-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the combination of most carriers and transition metals cannot rely solely on physical adsorption. In order to increase the loading capacity, the only way to increase the metal landing site is through surface modification. For example, the reaction of silica and silane coupling agent makes the surface have amino groups. Complicated the preparation process

Method used

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  • A kind of rhodium/phosphorene supported catalyst and its preparation method and application
  • A kind of rhodium/phosphorene supported catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a method for preparing a phosphorene sheet.

[0031] Put 300mg of black phosphorus in 80ml of pyrrolidone solution (concentration: 3.75mg / L) and sonicate for 2h, dilute the above-mentioned phosphorene into 80ml of deionized water, and continue to sonicate in the ultrasonic machine for 30min to obtain a black suspension containing phosphorene sheets liquid.

[0032] The suspension liquid obtained in this example has a stable dispersion system and no precipitation upon standing. The Raman shifts of the in-plane and out-of-plane vibration modes of the sheet are changed.

[0033] The phosphorene sheet layer obtained in this embodiment has a thickness of 50 nm and an average number of layers of 20.

Embodiment 2

[0035] This example provides a method for preparing a rhodium / phosphorene supported catalyst.

[0036] Weigh 0.5mg RhCl 3 Dissolved in 10mL deionized water to prepare 5g / L, after RhCl 3 After fully dissolving, join in the phosphorene lamellar suspension prepared by 20g embodiment 1 (phosphorene and RhCl 3 mass ratio 2:1), heated in a water bath at 80°C for 4 hours, centrifuged, washed, and dried to obtain a rhodium / phosphorene supported catalyst. The rhodium / phosphorene supported catalyst obtained in this example is black powder.

[0037] The rhodium nanoparticles in the obtained catalyst had a particle diameter of 10 nm.

Embodiment 3

[0039] This embodiment provides a method for catalytic hydrogenation of rubber.

[0040] Dissolve NBR in chlorobenzene to prepare NBR glue with a mass fraction of 10%.

[0041] Get 5g of NBR glue solution and place in 30ml reactor, add the rhodium / phosphorene supported catalyst that the embodiment 2 of glue solution mass fraction 1% makes, under the condition of pressure 4MPa, rotating speed 400r / min, at temperature 60 ℃, 80 respectively ℃, 100 ℃ hydrogenation reaction for 8 hours. The hydrogenation degree results are shown in Table 1 below, and the nuclear magnetic spectrum after hydrogenation is as follows figure 1 shown.

[0042] Table 1 Degree of hydrogenation at different temperatures

[0043] serial number temperature / ℃ Hydrogenation degree / % 1 60 89.7 2 80 95.8 3 100 96.5

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Abstract

The invention relates to a rhodium / phosphorene supported catalyst and its preparation method and application. The rhodium / phosphorene supported catalyst consists of sheet-layer phosphorene and RhCl 3 Made, the preparation method comprises: black phosphorus is assisted by liquid-phase ultrasonic exfoliation to obtain graphene-like sheet structure; RhCl 3 Dissolved in deionized water, stirred evenly, added to the sheet-layer phosphorene according to the proportion, reacted at 30-150°C for 60-600min, and then centrifuged and dried to obtain the product. The preparation method of the rhodium / phosphorene supported catalyst is simple, convenient and environmentally friendly; the prepared supported catalyst has high activity and good performance. The prepared supported catalyst is used for hydrogenation catalysis of rubber to achieve a higher degree of hydrogenation.

Description

technical field [0001] The invention relates to a supported catalyst for catalytic hydrogenation, in particular to a rhodium / phosphorene supported catalyst and its preparation method and application. Background technique [0002] Rubber hydrogenation is an important means to improve the properties of rubber, which can improve the mechanical properties, heat resistance and aging resistance of rubber, so it has been the focus of scientific research for many years. Noble metal nano-catalysts are often used in the rubber hydrogenation process, among which rhodium, ruthenium, palladium, etc. are the most deeply studied noble metals in the field of hydrogenation catalysis. [0003] Due to its unique properties, rhodium nanomaterials are widely used in the field of industrial catalysis, especially in petroleum refining, fine chemical synthesis, and automobile exhaust gas purification. However, the scarce storage capacity and high price greatly limit the application of rhodium cata...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185C08F8/04C08F236/12
CPCB01J27/1856B01J35/006B01J37/0207B01J37/343C08F8/04C08F236/12
Inventor 岳冬梅杜沛东张英东高敏李娜张立群
Owner BEIJING UNIV OF CHEM TECH
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