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A method for preparing a supported catalyst for furfural hydrogenation to cyclopentanone

A supported catalyst and a technology for preparing cyclopentanone, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problems of increasing catalyst costs and high prices , to achieve the effect of improving industrial production efficiency, improving quality, and preparing a wide range of raw materials

Active Publication Date: 2015-07-29
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the noble metal catalyst has a good dehydrogenation effect, its disadvantage is that it is expensive
[0004] These existing catalysts are used to prepare cyclopentanone, and the defect that exists is that most of them use noble metal catalysts to react, which increases the cost of catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Catalyst preparation process:

[0023] 1) Accurately weigh 9.0g of carbon nanotubes and place them in 180ml of concentrated nitric acid to disperse them evenly and form a suspension;

[0024] 2) Reflux and acidify the suspension in the above step 1) at 90°C for 48 hours, wash with water until neutral, centrifuge, and dry at 90°C to obtain a cylindrical solid;

[0025] 3) Grind the solid in the above step 2) into 80-120 mesh particles, accurately weigh 5.6g of the solid particle, and dissolve it in 200ml of deionized water to form a suspension;

[0026] 4) Weigh Cu(NO 3 ) 2 ·3H 2 O2.5g, dissolved in 50ml deionized water, then at room temperature and under stirring conditions, simultaneously dropwise add the above metal salt solution and ammonia solution with a concentration of 1:1 to the above suspension to pH=8-10, dropwise add The time is about 30 minutes, and the stirring is continued for 4 hours at room temperature to age it;

[0027] 5) Suction filter and w...

Embodiment 2

[0032] (1) Catalyst preparation process:

[0033] 1) Accurately weigh 9.0g of carbon nanotubes and place them in 90ml of concentrated nitric acid to disperse them evenly and form a suspension;

[0034] 2) Reflux and acidify the suspension in the above step 1) at 120°C for 24 hours, wash with water until neutral, centrifuge, and dry at 120°C to obtain a cylindrical solid;

[0035] 3) Grind the solid in the above step 2) into 80-120 mesh particles, accurately weigh 5.6g of the solid particle, and dissolve it in 150ml deionized water to form a suspension;

[0036] 4) Weigh Cu(NO 3 ) 2 ·3H 2 O2.5g, Ni(NO 3 ) 2 ·6H 2 03.0g, be dissolved in 50ml deionized water, then at room temperature, under stirring condition, dropwise add above-mentioned metal salt solution and mol ratio simultaneously in above-mentioned suspension liquid and be sodium hydroxide: ammoniacal liquor=1:1, mass total concentration is 40% of the solution to pH=8-10, the dropwise addition time is about 30min, c...

Embodiment 3

[0042] (1) Catalyst preparation process:

[0043] 1) Accurately weigh 9.0g of carbon nanotubes and place them in 150ml of concentrated nitric acid to disperse them evenly and form a suspension;

[0044] 2) Reflux and acidify the suspension in the above step 1) at 110°C for 36 hours, wash with water until neutral, centrifuge, and dry at 110°C to obtain a cylindrical solid;

[0045] 3) Grind the solid in the above step 2) into 80-120 mesh particles, accurately weigh 5.6g of the solid particle, and dissolve it in 100ml deionized water to form a suspension;

[0046] 4) Weigh Cu(NO 3 ) 2 ·3H 2 O1.2g, Ni(NO 3 ) 2 ·6H2 O3.0g, Mg(NO 3 ) 2 ·6H 2 O2.6g, be dissolved in 50ml deionized water, then at room temperature, under stirring condition, dropwise add above-mentioned metal salt solution and molar ratio to sodium hydroxide:sodium carbonate=2:1 simultaneously in above-mentioned suspension liquid, total mass concentration For 35% solution to pH=8-10, dropwise adding time is abo...

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Abstract

The invention discloses a method for preparing a supported catalyst for preparing cyclopentanone with furfural through hydrogenation. An activated carbon nano tube is adopted as a carrier, and loading metal comprises Ni, Cu, Co and Mg. The method for preparing the catalyst adopts a double dropwise adding and coprecipitation method, thus preparing the catalyst with high capacity and improving the catalytic effect of the catalyst; the preparation condition for the catalyst is easy to realize; and the range of raw materials for preparation is wide, precursors of all components are general and the raw materials for preparation can be selected flexibly according to market price. The catalyst prepared by the method has higher catalytic activity, the furfural conversion efficiency is above 96.6%, and the cyclopentanone selectivity is above 95.4%, so that the catalyst can be used for preparing the cyclpentanone with the furfural as a raw material, the problem that cyclopentanone self polymerization is easy to occur so as to generate a material with high boiling point in the process of generation of cyclopentanone by taking adipic acid as a raw material is solved, and the product yield is improved.

Description

technical field [0001] The present invention relates to the preparation of a novel catalyst for the preparation of cyclopentanone by furfural liquid-phase hydrogenation. active. Background technique [0002] Cyclopentanone is an important intermediate in the perfume and pharmaceutical industries, and can be used to produce fine chemical products such as new perfume methyl dihydrojasmonate and brandyne and anxiolytic buspirone, and can also be used in pesticides and weed control In addition, because cyclopentanone has good solubility, it is widely used as a solvent in the electronics industry, and the annual demand in the world is as high as 10,000 tons. Using cyclopentene separated from the by-product C5 fraction of petroleum cracking to prepare ethylene as raw material, the main process for preparing cyclopentanone is N 2 O direct oxidation method and cyclopentene hydration-dehydrogenation two technical routes. Although the direct oxidation method has been industrialized...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J23/72B01J23/75C07C45/59C07C49/395
Inventor 肖国民周铭昊朱红艳牛磊
Owner SOUTHEAST UNIV
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