Nickel-based catalyst derived from self-supporting layered double hydroxides as well as preparation method and application of nickel-based catalyst

A layered bimetallic, nickel-based catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, organic compound/hydride/coordination complex catalyst, hydrogenation preparation, etc., can solve the problem of low reaction conversion rate and other problems, to achieve the effect of high reaction selectivity and improved conversion rate

Pending Publication Date: 2022-08-09
ZHEJIANG XINHUA CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the catalyst is used in the hydrogenation reaction of olefins, the reaction conversion rate is still low

Method used

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  • Nickel-based catalyst derived from self-supporting layered double hydroxides as well as preparation method and application of nickel-based catalyst
  • Nickel-based catalyst derived from self-supporting layered double hydroxides as well as preparation method and application of nickel-based catalyst
  • Nickel-based catalyst derived from self-supporting layered double hydroxides as well as preparation method and application of nickel-based catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] This example provides a self-supporting layered double metal hydroxide derived nickel-based catalyst.

[0084] 1) Weigh 10g nickel foam, 50mL sodium carbonate solution, and ultrasonically treat for 30 minutes to remove surface stains; after washing with distilled water, ultrasonically treat with dilute hydrochloric acid for 30 minutes to remove surface oxide film; after washing with distilled water, place in 100mL hydrothermal reactor, add 60mL Aqueous ammonium chloride solution (1 mol / L) was reacted at 180° C. for 18 hours; the reaction was completed, washed with distilled water and dried to obtain a nickel hydroxide crystal layer grown in situ on the foamed nickel substrate.

[0085] 2) Prepare an aqueous solution of aluminum nitrate (0.3mol / L), an aqueous solution of sodium citrate (0.2mol / L), and an aqueous solution of sodium hydroxide, and respectively introduce nitrogen gas to remove carbon dioxide gas in the aqueous solution.

[0086] 3) In a nitrogen atmosphere,...

Embodiment 2

[0095] This embodiment provides a nickel-based catalyst.

[0096] 1) Weigh 10g of nickel fibers, 50mL of sodium carbonate solution, and ultrasonically treat for 30 minutes to remove surface stains; after washing with distilled water, ultrasonically treat with dilute hydrochloric acid for 30 minutes to remove surface oxide film; after washing with distilled water, place in a 100mL hydrothermal reactor, add 60mL Aqueous urea solution (5 mol / L) was reacted at 150° C. for 12 hours; the reaction was completed, washed with distilled water and dried to obtain a nickel hydroxide crystal layer grown in situ on the nickel fiber matrix.

[0097] 2) Configure an aqueous solution of aluminum nitrate (0.3mol / L), an aqueous solution of cobalt nitrate (0.05mol / L), an aqueous solution of sodium citrate (0.2mol / L), and an aqueous solution of sodium hydroxide, and respectively introduce nitrogen to remove carbon dioxide gas in the aqueous solution.

[0098] 3) In a nitrogen atmosphere, the nicke...

Embodiment 3

[0102] 1) with step 1 in Example 2);

[0103] 2) configure aluminum nitrate aqueous solution (0.3mol / L), sodium citrate aqueous solution (0.2mol / L), sodium hydroxide aqueous solution, respectively feed nitrogen to remove carbon dioxide gas in the aqueous solution;

[0104] 3) In a nitrogen atmosphere, the nickel fibers with the nickel hydroxide crystal layer grown in situ were added to a 250mL three-necked flask, the three-necked flask was placed in an ultrasonic water bath, the temperature of the water bath was controlled at 30°C, and the ultrasonic power was 300W; 30mL was added to remove After the aluminum nitrate (0.3 mol / L) aqueous solution of carbon dioxide, 30 mL of sodium citrate aqueous solution (0.2 mol / L) to remove carbon dioxide was added dropwise; after the dropwise addition, the temperature of the water bath was raised to 60 ° C, and then the hydrogen that removed carbon dioxide was added dropwise. The sodium oxide aqueous solution was adjusted to pH 10 and aged ...

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Abstract

The invention discloses a nickel-based catalyst derived from self-supporting layered double hydroxides as well as a preparation method and application of the nickel-based catalyst. The preparation method comprises the following steps: growing nickel hydroxide on a metal matrix, adding an aluminum salt, an organic acid or an organic acid salt and an alkali, reacting to prepare a self-supporting layered double-metal hydroxide, and reducing the self-supporting layered double-metal hydroxide, the metal matrix contains nickel; the organic acid is selected from one or a combination of more of citric acid, glutamic acid, aspartic acid and tartaric acid, and the organic acid salt is selected from one or a combination of more of sodium citrate, sodium glutamate, sodium aspartate, sodium tartrate, potassium citrate, potassium glutamate, potassium aspartate and potassium tartrate. The nickel-based catalyst is applicable to hydrogenation reaction of carbon-carbon double bonds, hydrogenation reaction of benzene rings or hydroamination reaction of ketone compounds, and is high in conversion rate.

Description

technical field [0001] The present invention relates to a nickel-based catalyst derived from a self-supporting layered double metal hydroxide and its preparation method and use. Background technique [0002] In industry, supported nickel-based catalysts are often used to catalyze the hydrogenation of carbon-carbon double bonds, the hydrogenation of benzene rings or the hydroamination of ketones. However, the above reactions are all exothermic reactions, while traditional supported nickel-based catalysts generally use powders such as alumina, silica, and titania as carriers. Local "hot spots" will reduce product selectivity, cause catalyst carbon deposition, accelerate catalyst deactivation, and even cause "flying temperature" to affect production safety. In addition, in order to ensure that the catalyst has sufficient mechanical strength, the catalyst supported by the powder carrier usually needs to add a binder during the molding process, but the binder basically has no ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/04B01J23/755C07C13/40C07C5/03C07C29/20C07C35/08C07C209/26C07C211/06
CPCB01J31/04B01J23/755C07C5/03C07C29/20C07C209/26C07C2602/20C07C2601/14B01J2231/646B01J2231/643C07C13/40C07C35/08C07C211/06Y02P20/52
Inventor 朱坚应思斌杨晶铃应登宇罗功禹杨建超
Owner ZHEJIANG XINHUA CHEM
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