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Preparation method and application of graphene loaded Ru catalyst

A catalyst and graphene technology, applied in chemical instruments and methods, physical/chemical process catalysts, hydrogenation hydrocarbon production, etc., can solve the problems of cumbersome steps, poor reaction conditions, short catalyst life, etc., and achieve thermal Good stability, superior reusability, and good industrial application prospects

Active Publication Date: 2015-08-05
ZHENGZHOU UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the liquid-phase benzene hydrogenation process represented by the IFP process, although the skeleton nickel catalyst is cheap, it also has obvious defects: such as poor sulfur resistance and thermal stability, and short catalyst life
However, in the preparation process of Pt noble metal catalysts, additives are often added, multi-step impregnation, the steps are cumbersome, the reaction conditions are not well reduced, and the yield is not very high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method for graphene supported Ru catalyst, comprising the following steps:

[0027] The first step, the preparation of nano-Ru catalyst: 15 g of PVP and 8 g of ruthenium trichloride are dissolved in a certain amount of distilled water, and the pH is adjusted to 6 with sodium hydroxide, then sealed in an autoclave, at a stirring rate of 800 Raise the temperature to the reduction temperature of 150 °C at the speed of rotation / min, hold for 3 h, wash the obtained solid with distilled water until the pH is 7, and the obtained nano-Ru catalyst;

[0028] The second step, the preparation of the graphene dispersion: disperse the graphene in the aqueous solution, stir and ultrasonically disperse to obtain a suspension;

[0029] The third step, the preparation of graphene-supported nano-Ru catalyst: mix the suspension containing 0.25g nano-Ru catalyst and 0.1g graphene, and keep it at the adsorption temperature of 80 ℃ for 1 h under the stirring speed of 400 rpm...

Embodiment 2

[0032] In the first step in Example 1, the quality of PVP in the preparation of the nano-Ru catalyst was changed to 8g, and the other conditions were the same as above. The catalyst evaluation results are shown in Table 1.

Embodiment 3

[0034] In the first step in Example 1, the quality of PVP in the preparation of the nano-Ru catalyst was changed to 80g, and the other conditions were the same as above. The catalyst evaluation results are shown in Table 1.

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Abstract

The invention relates to a preparation method and an application of a graphene loaded Ru catalyst. The method includes the following steps that (1) a nanometer Ru catalyst is prepared, and specifically, according to a weight ratio (1-10): 1 between polyvinyl pyrrolidone (PVP) and ruthenium trichloride, dissolving, potential of hydrogen (pH) adjusting, stirring and temperature rising and washing are performed to obtain a product that is the nanometer Ru catalyst; (2) a graphene dispersion liquid is prepared; (3) the graphene loaded nanometer Ru catalyst is prepared, and specifically, according to a weight ratio (1-10): 1 between PVP and the ruthenium trichloride, mixing, stirring, adsorption, centrifugal separation and vacuum drying are performed to obtain the graphene loaded nanometer Ru catalyst. By means of the preparation method and the application of the graphene loaded Ru catalyst, the prepared graphene stabilized nanometer Ru catalyst can efficiently catalyze benzene hydrogenation to generate cyclohexane at low temperature, and the catalyst is excellent in reusable property and good in heat stability and industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a preparation method and application of a graphene-supported Ru catalyst. Background technique [0002] Cyclohexane is widely used in petrochemical industry and is an important organic chemical raw material. The main economic use is to produce caprolactam and adipic acid, which are intermediates for synthesizing nylon-6 and nylon-66. It can also be used to produce cyclohexanol and cyclohexanone. At the same time, cyclohexane is also an excellent flux for resin, asphalt, cellulose ether and rubber. At present, 90% of the cyclohexane comes from the benzene hydrogenation process, except for a small amount of cyclohexane distilled and separated from petroleum fractionation. Therefore, as the most important method for preparing cyclohexane, the hydrogenation of benzene to prepare cyclohexane has important practical significance and high economic value. [0003] Catalyst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46C07C13/18C07C5/10
CPCY02P20/52
Inventor 刘仲毅孙海杰吴朝军张娇李保军李晓霞彭智昆李帅辉刘寿长
Owner ZHENGZHOU UNIV
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