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Body type copper-based ester hydrogenation catalyst and preparation method and application thereof

A hydrogenation catalyst and copper-based ester technology, which is applied in the preparation of hydroxyl compounds, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of high reaction pressure, low crushing strength, breakthrough and Control and other issues, to achieve highly dispersed metal elements, overcome uneven mixing, and highly dispersed distribution

Inactive Publication Date: 2013-04-10
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this type of catalyst also has certain shortcomings, such as low crushing strength, unstable activity, short life (catalyst regeneration is frequent), and the reaction pressure required for ester hydrogenation reaction is very high, usually above 20MPa, which is not conducive to industrial production.
In addition, due to the limitations of the preparation method, the dispersion of various metal elements and other doping elements as active components in the structure is in a random and disordered non-uniform state, which has a great influence on the distribution of catalytic active centers, activity The influence of the strength and number of centers can only be fine-tuned within a certain range, and cannot be fundamentally broken through and controlled, which will seriously affect the catalytic activity and the synergistic effect between active components.

Method used

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  • Body type copper-based ester hydrogenation catalyst and preparation method and application thereof
  • Body type copper-based ester hydrogenation catalyst and preparation method and application thereof
  • Body type copper-based ester hydrogenation catalyst and preparation method and application thereof

Examples

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Embodiment 1

[0020] Accurately weigh Cu(NO 3 ) 2 ·6H 2 O, Mg(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O, prepare mixed salt solution with deionized water, Cu in the solution 2+ The molar concentration is 0.3mol / L, Mg 2+ The molar concentration is 0.3mol / L, Al 3+The molar concentration is 0.15mol / L. Sodium hydroxide and sodium sulfate were dissolved in deionized water to prepare a mixed alkaline solution, wherein the molar concentration of sodium hydroxide was 1.2 mol / L, and the molar concentration of sodium salt was 0.3 mol / L. Pour an equal volume of 100ml mixed salt solution and mixed alkaline solution into the colloid mill at the same time, stir at a speed of 3000 rpm for 2 minutes, then centrifuge and wash with deionized water for 5 times until the pH reaches 7, and then mix with 250ml water Add it to a 500ml three-neck flask for crystallization at 60°C for 6 hours, and then cool it down to room temperature naturally. After filtration, washing, and drying at 60°C for 12 hours, ...

Embodiment 2

[0023] Accurately weigh Cu(NO 3 ) 2 6H2O, Mg(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O, prepare mixed salt solution with deionized water, Cu in the solution 2+ The molar concentration is 0.2mol / L, Mg 2+ The molar concentration of Al is 0.2mol / L, Al 3+ The molar concentration is 0.2mol / L. Sodium hydroxide and sodium chloride were dissolved in deionized water to prepare a mixed alkaline solution, wherein the molar concentration of sodium hydroxide was 0.96 mol / L, and the molar concentration of sodium chloride was 0.4 mol / L. Pour an equal volume of 100ml of mixed salt solution and mixed alkaline solution into the colloid mill at the same time, stir at a speed of 5000 rpm for 5 minutes, then centrifuge and wash with deionized water for 5 times until the pH reaches 7, and then mix with 250ml of water Add it to a 500ml three-neck flask for crystallization at 80°C for 24 hours, and then naturally cool to room temperature. After filtration, washing, and drying at 80°C for 24 ...

Embodiment 3

[0026] Accurately weigh Cu(NO 3 ) 2 ·6H 2 O, Mg(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O, prepare mixed salt solution with deionized water, Cu in the solution 2+ The molar concentration is 0.3mol / L, Mg 2+ The molar concentration is 0.3mol / L, Al 3+ The molar concentration is 0.4mol / L. Sodium hydroxide and sodium chloride were dissolved in deionized water to prepare a mixed alkaline solution, wherein the molar concentration of sodium hydroxide was 1.6 mol / L, and the molar concentration of sodium chloride was 0.8 mol / L. Pour an equal volume of 100ml mixed salt solution and mixed alkaline solution into the colloid mill at the same time, stir at a speed of 6000 rpm for 10 minutes, then centrifuge and wash with deionized water for 5 times until the pH reaches 7, and then mix with 250ml water Add it to a 500ml three-neck flask for crystallization at 80°C for 24 hours, and then naturally cool to room temperature. After filtering, washing, and drying at 70°C for 12 hours to ...

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Abstract

The invention provides a preparation method of a high dispersion body type copper-based metal catalyst. The copper-based metal catalyst is prepared by the following steps of: baking in an air atmosphere at a high temperature by taking Cu / Mg / Al laminar double-metal hydroxide particles as a precursor to obtain a Cu / Mg / Al compound metal oxide; and reducing in a hydrogen atmosphere to obtain a catalyst through which nanometer metal copper is highly dispersed into a magnesium-aluminum compound metal oxide substrate. The catalyst has the characteristics of high dispersion and high activity, and the specific surface area is 100-200 m<2> / g. The catalyst is applied to hydrogenation of 1,4-cyclohexanedicarboxylate for preparing 1,4-cyclohexanedimethanol, the reaction transformation ratio can be up to 90-99 percent, and the selectivity of 1,4-cyclohexanedimethanol is up to 90-98 percent.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a high-dispersion, high-activity bulk copper-based hydrogenation catalyst and a preparation method thereof. The catalyst is mainly used for the hydrogenation of dimethyl 1,4-cyclohexanedicarboxylate to prepare 1,4 - Cyclohexanedimethanol. Background technique [0002] 1,4-cyclohexanedimethanol (CHDM) is an important raw material for polyester production in industry, and the synthesized unsaturated polyester can be used as colloidal coating, lamination and injection resin, and its products have good Chemical and environmental resistance. CHDM is used in the production of polyester fiber, not only has the characteristics of low density and high melting point, but also has better hydrolytic stability and electrical properties, especially suitable for making electrical equipment. The high symmetry of CHDM can also make polyester resin Increased crystallinity and glass ...

Claims

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Application Information

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IPC IPC(8): B01J23/72C07C31/27C07C29/149
Inventor 李峰张绍岩刘全遥李木子范国利
Owner BEIJING UNIV OF CHEM TECH