Simple preparation method for one-piece high load copper base catalyst

A copper-based catalyst and high-loading technology, which is applied in the preparation of hydroxyl compounds, chemical instruments and methods, and the preparation of organic compounds. Weak carrier interaction, affecting the hydrogenation activity life of the catalyst, etc., to achieve the effect of improving stability and service life, more active sites, and higher loading capacity

Inactive Publication Date: 2015-08-19
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the supported metal catalysts prepared by traditional co-precipitation and impregnation methods, due to the uneven distribution of active components and the weak interaction between the metal and the support, it is difficult to prepare supported metal catalyst materials with small particle size and uniform dispersion, especially for high A large amount of agglomeration of metal particles is caused by the loading capacity, which seriously affects the hydrogenation activity and service life of the catalyst

Method used

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  • Simple preparation method for one-piece high load copper base catalyst
  • Simple preparation method for one-piece high load copper base catalyst
  • Simple preparation method for one-piece high load copper base catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Accurately weigh Cu(NO 3 ) 2 ·6H 2 O, Mg(NO 3 ) 2 ·6H 2 O is prepared into a mixed salt solution with deionized water, and Cu in the solution 2+ The molar concentration is 0.5mol / L, Mg 2+ The molar concentration is 0.3mol / L. Sodium hydroxide and sodium carbonate were dissolved in deionized water to prepare a mixed alkaline solution, wherein the molar concentration of sodium hydroxide was 0.8 mol / L, and the molar concentration of sodium carbonate was 0.4 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 8 minutes, then wash with deionized water for 5 times, and then add it to a 500ml three-necked bottle together with 250ml water crystallized at 70°C for 12 hours, and then cooled to room temperature naturally. After filtration, washing, and drying at 60°C for 18 hours to obtain hydroxide nanoparticles, the prepared catalyst precursor was placed in a muffle fu...

Embodiment 2

[0025] Accurately weigh Cu(NO 3 ) 2 ·6H 2 O, Mg(NO 3 ) 2 ·6H 2 O, prepare mixed salt solution with deionized water, Cu in the solution 2+ The molar concentration is 0.55mol / L, Mg 2+The molar concentration is 0.25mol / L. Dissolve sodium hydroxide and sodium sodium carbonate in deionized water to prepare a mixed alkaline solution, wherein the molar concentration of sodium hydroxide is 0.90 mol / L, and the molar concentration of sodium carbonate is 0.45 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 5000 rpm for 6 minutes, then wash with deionized water for 4 times, and then add it to a 500ml three-necked bottle together with 250ml water crystallized at 70°C for 24 hours, and then cooled to room temperature naturally. After filtering, washing, and drying at 90°C for 30 hours to obtain hydroxide nanoparticles, the prepared catalyst precursor was placed in a muffle furnace, and th...

Embodiment 3

[0028] Accurately weigh Cu(NO 3 ) 2 ·6H 2 O, Mg(NO 3 ) 2 ·6H 2 O, prepare mixed salt solution with deionized water, Cu in the solution 2+ The molar concentration is 0.6mol / L, Mg 2+ The molar concentration is 0.2mol / L. Dissolve sodium hydroxide and sodium carbonate in deionized water to prepare a mixed alkaline solution, wherein the molar concentration of sodium hydroxide is 1.0 mol / L, and the molar concentration of sodium carbonate is 0.5 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 wash with deionized water for 3 times, and then add it to a 500ml three-necked bottle together with 250ml water crystallized at 80°C for 48 hours, and then cooled to room temperature naturally. After filtering, washing, and drying at 100°C for 24 hours to obtain hydroxide nanoparticles, the prepared catalyst precursor was placed in a muffle furnace, and the temper...

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Abstract

The invention discloses a simple preparation method for a one-piece high load copper base catalyst, which belongs to the technical field of catalyst preparation. Precursors of a metal oxide and active metal are blended at high speed by using a colloid mill, the nucleation process and the crystallization process of precursors of a carrier and an active component are isolated to obtain highly dispersed hydroxide nanoparticle sol, and finally the one-piece high load copper base catalyst which is controllable in metal nucleus diameter and uniform in dispersion is prepared by roasting and reduction. The one-piece high load copper base catalyst is characterized in that nano metal copper is dispersed and anchored in a single magnesium oxide substrate, the specific surface area is 50 to 150 m<2>/g, and the percentage mass content of the copper is 50 to 90 %. After the catalyst is used for hydrogenation preparation of 1, 4-cyclohexanedimethanol by 1, 4-dimethyl cyclohexanedicarboxylic acid and hydrogenation preparation of furfuryl alcohol by furfural, the reaction conversion rate can reach 90 to 99%, and the selectivity to a main product reaches 90 to 99%.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular provides a simple integrated method for preparing a high-loaded copper-based catalyst. The catalyst is mainly used for hydrogenation of compounds containing carbonyl groups. Background technique [0002] 1,4-Cyclohexanedimethanol (CHDM) is a diol with high application value, mainly used in the production of polyester fibers, and can also be used as colloidal coatings, lamination and injection resins, and this type The product has good chemical resistance and environmental resistance. Compared with ethylene glycol, the polyester fiber produced by it has a lower density, is lighter, has a high melting point, so it can withstand higher temperatures, and its hydrolysis stability and Insulation is very good. In addition, the high symmetry of CHDM can also improve the crystallinity and glass transition temperature of polyester resin; since the primary hydroxyl group of C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J35/02C07C35/14C07C29/149C07D307/44
Inventor 李峰刘瀚文范国利杨兰
Owner BEIJING UNIV OF CHEM TECH
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