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Preparation method of solid base catalyst, solid base catalyst and application thereof

A solid base catalyst, metal nitrate technology, applied in the preparation of organic compounds, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low catalytic activity, many side reactions, poor stability, etc., and achieve catalytic activity. High, good stability, improve the effect of dispersion

Active Publication Date: 2020-02-25
RUNTAI CHEM TAIXING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The esterification reaction is a typical acid-catalyzed reaction, generally using liquid acids such as concentrated sulfuric acid, phosphoric acid, and benzenesulfonic acid as catalysts, although liquid acid catalysts have high reactivity for esterification reactions, but at the same time liquid acid Catalysts also have many disadvantages, such as many side reactions, high acid consumption, and large pollution. Therefore, it has become a trend to develop environmentally friendly green catalysts to replace traditional acid catalysts.
[0003] Compared with liquid acids, solid base catalysts have the advantages of high selectivity, easy recovery, easy phase separation from reactants, and reusability, but the solid base catalysts in the prior art also have deficiencies, and some solid base catalysts have catalytic activity. Low and poor stability, so how to improve the catalytic activity and stability of solid base catalysts is the focus of current research and development

Method used

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preparation example Construction

[0024] A preparation method of solid base catalyst, comprising the following steps:

[0025] 1) Dissolve metal nitrate in deionized water, add ɡ-C under stirring condition 3 N 4 (Graphiticcarbonnitride, graphite-like carbon nitride) or NMC (nitrogen-doped mesoporous carbon material);

[0026] 2) Add ammonia water dropwise to the solution prepared in step 1) at 50-70°C, wash and dry after 1-2 hours, then add it to n-butanol, and stir;

[0027] 3) The product obtained in step 2) is dried at 80-100° C. for 6-12 hours, and then calcined.

[0028] The metal nitrate and ɡ-C 3 N 4 Or the mass ratio of NMC is 5:100~30:100; in the step 2), the concentration of the ammonia water is 0.1mol / l~2mol / l; in the step 2), after adding to n-butanol , stirred, and left to stand until n-butanol volatilizes completely; in the step 3), the roasting temperature is 400-800° C., and the roasting time is 1-10 h; in the step 2), ammonia water is added dropwise until the pH of the solution is 9-12; ...

Embodiment 1

[0032] The preparation method of the solid base catalyst of the present embodiment comprises the following steps:

[0033] 1) Dissolve 10g of sodium nitrate and copper nitrate in 200g of deionized water, and add 90g of ɡ-C under stirring conditions 3 N 4 ;

[0034] 2) The solution prepared in step 1) was added dropwise with diluted 1mol / l ammonia water at 50°C, and the ammonia water was added dropwise until the pH of the solution was 11, washed and dried after 1h, then added to n-butanol, stirred, Leave it to stand until n-butanol volatilizes completely;

[0035] 3) The product obtained in step 2) was dried at 80°C for 12h, and then calcined in a muffle furnace at 500°C for 3h to obtain Na 2 O-CuO / ɡ-C 3 N 4 solid base catalyst.

Embodiment 2

[0037] The preparation method of the solid base catalyst of the present embodiment comprises the following steps:

[0038] 1) Dissolve 10g of calcium nitrate and copper nitrate in 200g of deionized water, add 90g of ɡ-C under stirring conditions 3 N 4 ;

[0039] 2) The solution prepared in step 1) was added dropwise with diluted 0.8mol / l ammonia water at 60°C until the pH of the solution was 10, washed and dried after 1.5h, and then added to n-butanol, Stir and let stand until n-butanol volatilizes completely;

[0040] 3) The product obtained in step 2) was dried at 90°C for 8h, and then calcined in a muffle furnace at 600°C for 3h to obtain CaO-CuO / ɡ-C 3 N 4 solid base catalyst.

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Abstract

The invention relates to the technical field of solid catalysts, and in particular, to a method for preparing a solid base catalyst, the solid base catalyst, and applications thereof. The method includes dissolving metal nitrate into deionized water, adding g-C3N4 or NMC under stirring conditions, adding diluted ammonia water into the prepared solution at 50-70 DEG C, after 1-2 h, washing and drying, adding an obtained product into n-butanol, stirring, drying the prepared product at 80-100 DEG C for 6-12 h, and then roasting the product to obtain the solid base catalyst. The solid base catalyst of the invention has high catalytic activity and good stability.

Description

technical field [0001] The invention relates to the technical field of solid catalysts, in particular to a preparation method of a solid base catalyst, a solid base catalyst and applications thereof. Background technique [0002] Esterification reaction is a common chemical reaction, and its product organic esters are widely used in the preparation of materials, daily chemicals, food, medicine, solvents and surfactants. They are very important fine chemical products. In addition, they are also used in the synthesis of various raw materials The important chemical process of intermediates and intermediates occupies an important proportion in the production of the national economy. The esterification reaction is a typical acid-catalyzed reaction, generally using liquid acids such as concentrated sulfuric acid, phosphoric acid, and benzenesulfonic acid as catalysts, although liquid acid catalysts have high reactivity for esterification reactions, but at the same time liquid acid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C07C67/08C07C69/28
CPCB01J27/24B01J23/002C07C67/08C07C69/28Y02P20/584
Inventor 张润赟张世元卢小松杨萍
Owner RUNTAI CHEM TAIXING CO LTD
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