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A kind of composite nanostructure copper catalyst, its preparation method and application

A technology of composite nanostructure and copper catalyst, which is applied in the field of catalysis, can solve the problems of harsh reaction conditions, high copper oxide content, poor dispersion, etc., and achieve the effects of low reaction temperature, improved conversion rate and selectivity, and mild reaction conditions

Active Publication Date: 2021-03-30
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst prepared by this method not only has a high content of copper oxide, but also has poor dispersion
CN106749120A discloses a mixed carrier of calcium carbonate and silicon dioxide, with copper oxide as the active component, at a reaction temperature of 205-209°C, a reaction pressure of 6.3-6.6Mpa, and a reaction time of 1-5h. Furfural selective hydrogenation reaction, although higher conversion rate and selectivity are also obtained, but relatively harsh reaction conditions are still maintained

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  • A kind of composite nanostructure copper catalyst, its preparation method and application
  • A kind of composite nanostructure copper catalyst, its preparation method and application
  • A kind of composite nanostructure copper catalyst, its preparation method and application

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Embodiment 1

[0029] A composite nanostructure copper catalyst, specifically 12% Cu / @ 15% TiO 2 / SBA-15 catalyst, wherein the mass content of copper is 12%, and TiO in a composite carrier 2 The mass content is 15%.

[0030] The specific preparation method of the above composite nanostructure copper catalyst is as follows:

[0031] 1,15% TIO 2 / SBA-15 composite carrier prepared, specific: formulated a solution containing 0.75 ml of butyl hydrate ethanol; formulated a B solution containing 1.5 ml of water, 1.125 ml of glacial acetic acid and 10 ml of anhydrous ethanol; continued to stir The B solution was added dropwise to the a solution (a stirring rate of 500 r / min), and the concentration of concentrations of 0.02-0.08 mol / L was added to adjust the pH of 3-4; after 30min, 1 g of SBA is added. 15 molecular sieves were continued at 45 ° C for 2-3 h, and the resulting sol was oscillated in ultrasound 30 min and then placed into a gel (the ultrasonic oscillation time was 30 min; the left ti...

Embodiment 2

[0035] In the same embodiment, the catalyst is 10% Cu / @ 15% TiO 2 / SBA-15 catalyst. 10% CU / @ 15% TIO 2 / SBA-15 catalyst XRD diagram Figure 4 ,From Figure 4 It can be seen in TIO 2 Atomic laminate layer (TiO 2 Single-layer or multilayer) is applied to the carrier SBA-15; XRD chart shows that nano copper is mainly in the form of copper.

Embodiment 3

[0037] In the same embodiment, the catalyst is 12% Cu / @ 20% TiO 2 / SBA-15 catalyst. 12% CU / @ 20% TIO 2 / SBA-15 catalyst XRD diagram Figure 5 ,From Figure 5 It can be seen in TIO 2 Atomic laminate layer (TiO 2 Single-layer or multilayer) is applied to the carrier SBA-15; XRD chart shows that nano copper is mainly in the form of copper.

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Abstract

The invention provides a composite nanostructure copper catalyst. The catalyst is Cu / @-TiO2 / SBA-15 catalyst. The catalyst has three characteristics shown as follows: TiO2 is coated to a carrier SBA-15in a form of a film layer (one layer or a plurality of layers) to prepare a TiO2 / SBA-15 composite carrier; the nano copper is mainly in a form of copper element and can coordinate with the TiO2 filmlayer to realize the catalyzing effect. The invention further discloses a preparation method of the composite nanostructure copper catalyst. The preparation method comprises the preparation of the TiO2 / SBA-15 composite carrier and the preparation of the Cu / @-TiO2 / SBA-15 catalyst. According to the method, TiO2 can be coated to the carrier SBA-15 in the form of the film layer, and the nano copper generally exists in the form of copper element. The invention further discloses application of the composite nanostructure copper catalyst. The composite nanostructure copper catalyst is mainly used inhydrogenation reaction, particularly furfural selective hydrogenation for preparing furfuryl alcohol; the reaction conditions are mild; the furfuryl alcohol conversion rate and selectivity are high; the practicability is high.

Description

Technical field [0001] The present invention relates to the field of catalytic technology, and in particular, to a composite nanostructured copper catalyst, a preparation method thereof and an application thereof. Background technique [0002] Hydrofluo is an important organic chemical raw material for making a good performance of furan-type resin, furfury-urea resin, and phenolic resin. It is also possible to produce fine chemical products such as pharmaceuticals, pesticides, coatings; furfury is also varnish, pigment Good solvent and rocket fuel. At the same time, the furfury is widely used in synthetic fibers, rubber and other industries. The furfury is mainly derived from the deep processing of furfural, and it has important economic value and practical significance through the selective hydrogenation of furfural. [0003] At present, furfural hydrogenation catalysts are mostly using a single oxide carrier or porous material type carrier, for example, CN105148923A discloses a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/03C07D307/44
CPCB01J29/0333B01J2229/20C07D307/44
Inventor 周继承李凯吕梦蝶
Owner XIANGTAN UNIV