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Cyclohexene Ru@Y2O3 catalyst prepared by selective hydrogenation of benzene and preparation method and application of cyclohexene Ru@Y2O3 catalyst

A technology for selective hydrogenation and catalyst, applied in the chemical industry, can solve the problems of limited popularization and application, high requirements on corrosion resistance, etc., and achieve high activity, high cyclohexene selectivity, catalyst activity and high cyclohexene selectivity. Effect

Active Publication Date: 2019-03-08
ZHENGZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, ZnSO 4 The aqueous solution is acidic, and the higher the temperature, the stronger the acidity. Therefore, the catalytic system has high requirements on the corrosion resistance of the reaction device, and Hastelloy alloy with strong acid resistance is required, which greatly limits the selective hydrogenation of benzene to cyclohexene. Promotion and application of technology

Method used

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  • Cyclohexene Ru@Y2O3 catalyst prepared by selective hydrogenation of benzene and preparation method and application of cyclohexene Ru@Y2O3 catalyst
  • Cyclohexene Ru@Y2O3 catalyst prepared by selective hydrogenation of benzene and preparation method and application of cyclohexene Ru@Y2O3 catalyst
  • Cyclohexene Ru@Y2O3 catalyst prepared by selective hydrogenation of benzene and preparation method and application of cyclohexene Ru@Y2O3 catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take 2.63g RuCl 3 ·3H 2 Add O to 100mL distilled water to make a solution, take 2.0g NaOH and dissolve it in 100mL distilled water to make a solution, quickly pour the NaOH solution into RuCl with stirring at 80°C 3 ·3H 2 O solution. Stirring was continued at 80°C for 30 min to complete the precipitation. Then add the precipitate together with the slurry into a 1L autoclave, and reduce for 3 hours at 150°C, hydrogen pressure 5MPa, stirring speed 800r / min. The obtained black solid was washed with distilled water until the filtrate was neutral, and the obtained black solid was the nano-Ru catalyst. Take 2.27g Y(NO 3 ) 3 ·6H 2 O solution in 100mL distilled water, Y:Ru atomic ratio is 0.6:1, 4mol / L NaOH solution is added dropwise to Y(NO 3 ) 3 solution until no more precipitates formed. Add 1mol / L citric acid solution to Y(NO 3 ) 3 ·6H 2 O solution until the precipitate is completely dissolved to obtain the sol of Y. Take 1g of nano-Ru catalyst and add it to t...

Embodiment 2

[0039] 2.27g Y(NO 3 ) 3 ·6H 2 O was replaced by 0.38g Y (NO 3 ) 3 ·6H 2 The atomic ratio of O, Y:Ru is 0.1:1, and other conditions are the same as in Example 1. The evaluation results are shown in Table 1. from figure 2 It can be seen that the crystallite size of the catalyst is about 5nm.

Embodiment 3

[0041] 2.27g Y(NO 3 ) 3 ·6H 2 O was replaced by 5.68g Y (NO 3 ) 3 ·6H 2 The atomic ratio of O, Y:Ru is 1.5:1, and other conditions are the same as in Example 1. The evaluation results are shown in Table 1. from figure 2 It can be seen that the crystallite size of the catalyst is about 5nm.

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Abstract

The invention discloses a cyclohexene Ru@Y2O3 catalyst prepared by selective hydrogenation of benzene. The catalyst is composed of an active component Ru and an auxiliary agent Y2O3, and the structureof the catalyst is formed by covering a Ru nanoparticle with the auxiliary agent Y2O3; the active component Ru and the auxiliary agent Y2O3 are both calculated by the number of atoms of metal elements; the atomic number of Ru is 1, and the atomic number ratio of each component in the catalyst is 1, and Y is 0.10 to 1.50. The invention provides a novel preparation technology of the cyclohexene catalyst prepared by selective hydrogenation of benzene; the cyclohexene Ru@Y2O3 catalyst prepared by selective hydrogenation of benzene can be prepared by using the technology. The catalyst is high in activity and high in cyclohexene selectivity in the absence of ZnSO4. The catalyst disclosed by the invention has higher Ru@Y2O3 catalyst activity and cyclohexene selectivity than a conventional industrial catalyst, and the catalyst can be reused with good stability.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular, relates to a kind of selective hydrogenation of benzene to cyclohexene Ru@Y 2 o 3 Catalysts, their preparation and their applications. Background technique [0002] Currently, the selective hydrogenation of benzene to cyclohexene has attracted much attention. The demand for nylon 6 and nylon 66 is increasing day by day. Cyclohexene has active double bonds and is an important organic intermediate. It is widely used in the production of adipic acid, nylon 6, nylon 66, polyamide, polyester and other fine chemicals. Compared with the complete hydrogenation of benzene, the selective hydrogenation of cyclohexene with benzene has the advantages of reducing energy consumption, less pollution, and saving raw materials, so it has good social and economic benefits. [0003] However, the selective hydrogenation of benzene is extremely unfavorable both in thermodynamics and kinetics, and t...

Claims

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Application Information

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IPC IPC(8): B01J23/63C07C13/20C07C5/11
CPCC07C5/11B01J23/63C07C2601/16C07C2523/63B01J35/393B01J35/23C07C13/20Y02P20/52
Inventor 孙海杰陈凌霞李会吉李永宇蔡文娟朱建平马锦华
Owner ZHENGZHOU NORMAL UNIV