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Preparation method of catalyst for cyclohexene prepared by selective benzene hydrogenation, and catalyst prepared by method

A technology for selective hydrogenation and catalysts, applied in the direction of catalyst carriers, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of reduced catalyst life, achieve narrow particle size distribution, and the preparation method Simple, reproducible results

Inactive Publication Date: 2015-09-23
BEIJING RISUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, considering the introduction of the carrier, impurities may also be introduced, which may lead to a reduction in the life of the catalyst

Method used

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  • Preparation method of catalyst for cyclohexene prepared by selective benzene hydrogenation, and catalyst prepared by method
  • Preparation method of catalyst for cyclohexene prepared by selective benzene hydrogenation, and catalyst prepared by method
  • Preparation method of catalyst for cyclohexene prepared by selective benzene hydrogenation, and catalyst prepared by method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dissolve 4 g of polyvinylpyrrolidone in water, add 0.5 g of RuCl 3 ·nH 2 O (Ru content 40% (weight)) aqueous solution and 0.08g ZnSO 4 ·7H 2 Aqueous solution of O (polyvinylpyrrolidone: Ru=20:1 (weight)), uniformly mixed. Then, 4 ml of 10 mol / L NaOH aqueous solution was added dropwise to the above solution, stirred at 60° C. for 3 hours, and aged overnight. Then the resulting solution was added to a 60ml autoclave, at 150°C, with 5MPa of H 2 After reducing for 15 hours, filtering and washing three times, the catalyst for reaction was obtained.

Embodiment 2

[0034] Dissolve 1g of sodium polyacrylate in water, add 0.5g of RuCl to it 3 ·nH 2 O (Ru content 40% (weight)) aqueous solution and 0.08g ZnSO 4 ·7H 2 O aqueous solution (sodium polyacrylate: Ru = 5:1 (weight)), uniformly mixed. Then, 4 ml of 10 mol / L NaOH aqueous solution was added dropwise to the above solution, stirred at 60° C. for 3 hours, and aged overnight. Then the solution was added to a 60ml autoclave, at 150°C, with 5MPa of H 2 After reducing for 15 hours, filtering and washing three times, the catalyst for reaction was obtained.

Embodiment 3

[0036] Dissolve 2.7g of sodium dodecylsulfonate in water, add 0.5g of RuCl 3 ·nH 2 O (Ru content 40% (weight)) aqueous solution and 0.08g ZnSO 4 ·7H 2 O aqueous solution (sodium dodecylsulfonate: Ru = 13.5:1 (weight)), uniformly mixed. Then, 4 ml of 10 mol / L NaOH aqueous solution was added dropwise to the above solution, stirred at 60° C. for 3 hours, and aged overnight. Then the resulting solution was added to a 60ml autoclave, at 150°C, with 5MPa of H 2 After reducing for 15 hours, filtering and washing three times, the catalyst for reaction was obtained.

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Abstract

The invention relates to a preparation method for catalysts for preparing cyclohexene through benzene selective-hydrogenation, which comprises the following steps of: uniformly mixing surfactants pre-dissolved into water with water solution of ruthenium salts and zinc salts; then, dripping alkali liquor for precipitating the solution; then, using reducing agents for reduction; forming nanometer ruthenium zinc with stable surfactants; and filtering and washing the prepared nanometer ruthenium zinc to obtain high-dispersion nanometer ruthenium zinc catalysts, wherein on the basis of the total weight of the catalysts, the ruthenium accounts for 70 to 95 weight percent, the zinc accounts for 5 to 30 weight percent, and the particle diameter of the metal ruthenium zinc particles in the prepared catalysts is 1 to 5nm. The catalysts prepared by the method disclosed by the invention have the advantages that the activity is higher, the cyclohexene yield is higher, and the catalyst service life is longer. The preparation process of the method disclosed by the invention has the advantages that the process is simple, and the repetitiveness is good.

Description

[0001] This application is a divisional case of an invention patent application with an application date of September 13, 2011, an application number of 201110270359.7, and an invention titled "Preparation method of a catalyst for the selective hydrogenation of benzene to cyclohexene and the catalyst prepared by this method" Apply. technical field [0002] The invention relates to a preparation method of a catalyst for preparing cyclohexene through the selective hydrogenation of benzene and the catalyst prepared by the method. Background technique [0003] As an intermediate in organic synthesis, cyclohexene is widely used in the production of adipic acid, nylon-6, nylon-66, polyamide, polyester and other fine chemicals. Cyclohexene and its downstream products have important industrial uses and broad market prospects, and the hydrogenation of benzene to cyclohexene has huge industrial economic value. [0004] At present, in the production of nylon-6 and nylon-66, the comple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/60B01J32/00B82Y40/00C07C13/20C07C5/11
CPCY02P20/52
Inventor 杨雪岗徐臣张英伟张新志刘康
Owner BEIJING RISUN TECH CO LTD