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Preparation method of solid acid catalyst as well as product and application thereof

A technology of solid acid catalyst and nitric acid, which is applied in the direction of catalyst activation/preparation, preparation of organic compounds, preparation of carboxylate, etc. It can solve problems such as difficult recycling and water pollution, achieve excellent catalytic activity, increase yield, and prepare The effect of simple method

Active Publication Date: 2020-12-04
TIANJIN KERMEL CHEM REAGENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sulfuric acid or sulfate substances are used in the preparation process of this type of solid acid catalyst, which are not easy to recycle, and are easy to cause water pollution

Method used

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  • Preparation method of solid acid catalyst as well as product and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of preparation method of solid acid catalyst, described preparation method comprises the following steps:

[0028] (1) Mix 2 mL of tetraethyl orthosilicate, 2 mL of absolute ethanol, 1.8 mL of water and 0.4 mL of nitric acid, and stir magnetically at a speed of 350 rpm for 2 hours to obtain a transparent solution;

[0029] (2) 8.1mmol bismuth nitrate is added in 30mL 4mol / L nitric acid solution, magnetic stirring, the rotating speed of magnetic stirring is 350rpm, stirring time 2h, make it dissolve completely; Then ytterbium nitrate and lutetium nitrate are added in the above-mentioned solution, Continue stirring for 2.5h to obtain a mixed solution;

[0030] (3) The mixed solution obtained in step (2) is added dropwise to the transparent solution in step (1), under stirring conditions, the sodium hydroxide solution of 6mol / L is added dropwise to adjust the pH to 13, and then Continue ultrasonic treatment for 35min to obtain a suspension, the ultrasonic treatment...

Embodiment 2

[0033] A kind of preparation method of solid acid catalyst, described preparation method comprises the following steps:

[0034] (1) Mix 2 mL of tetramethyl orthosilicate, 2.4 mL of absolute ethanol, 2 mL of water, and 0.6 mL of nitric acid, and stir magnetically at a speed of 400 rpm for 1 hour to obtain a transparent solution;

[0035] (2) bismuth acetate is added in 40mL 4mol / L nitric acid solution, magnetic stirring, the rotating speed of magnetic stirring is 400rpm, stirring time 1h, makes it dissolve completely; The mol ratio of described tetramethyl orthosilicate and bismuth acetate is 1:1; then add ytterbium acetate and lutetium chloride to the above solution, and continue to stir for 3h to obtain a mixed solution;

[0036] (3) The mixed solution obtained in step (2) is added dropwise to the transparent solution in step (1), under stirring conditions, the potassium hydroxide solution of 8mol / L is added dropwise to adjust the pH to 13, and then Continue ultrasonic trea...

Embodiment 3

[0039] A kind of preparation method of solid acid catalyst, described preparation method comprises the following steps:

[0040] (1) Mix 2mL tetrabutyl orthosilicate, 1.6mL absolute ethanol, 1.6mL water, and 0.3mL nitric acid, and stir magnetically at a speed of 300rpm for 3 hours to obtain a transparent solution;

[0041](2) bismuth chloride is added in 20mL 4mol / L nitric acid solution, magnetic stirring, the rotating speed of magnetic stirring is 300rpm, stirring time 3h, makes it dissolve completely; The mole of described tetrabutyl orthosilicate and bismuth chloride The ratio is 1:0.8; then ytterbium chloride and lutetium acetate are added to the above solution, and stirring is continued for 3h to obtain a mixed solution;

[0042] (3) the mixed solution obtained in step (2) is added dropwise to the transparent solution in step (1), under stirring conditions, the sodium hydroxide solution of 5mol / L is added dropwise to adjust the pH to 13, and then Continue ultrasonic trea...

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Abstract

The invention discloses a preparation method of a solid acid catalyst as well as a product and application thereof. The ytterbium and lutetium co-doped bismuth silicate solid acid catalyst is obtainedby mixing raw materials under an ultrasonic treatment condition and then carrying out hydrothermal treatment, the ultrasonic treatment can promote the completeness of a crystal form and further promote the improvement of the performance of the catalyst, the acidity of the catalyst is further improved through the co-doping of ytterbium and lutetium, and the performance of the catalyst is improved.Therefore, the solid acid catalyst provided by the invention is an ideal material for catalytic conversion of benzyl acrylate.

Description

technical field [0001] The invention relates to the field of solid acid catalysts, in particular to a preparation method of a solid acid catalyst and its products and applications. Background technique [0002] Due to the unsaturated double bond structure and functional groups derived from polar molecules, acrylates can form a variety of polymers with different application properties. They have various excellent properties, such as chemical stability, high transparency, color Persistence, toughness, etc., make it occupy a very important position in the chemical industry, and are widely used in photosensitive curing agents, adhesives, special rubber, coatings, plastic modification, synthetic resins, printing and dyeing, chemical fiber, fiber processing, leather production, papermaking and other industries. Benzyl acrylate, also known as benzyl alcohol acrylate, is stable under normal temperature and pressure due to the benzene ring group contained in its molecule. [0003] ...

Claims

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Application Information

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IPC IPC(8): B01J23/18B01J37/10B01J37/34C07C67/08C07C69/54
CPCB01J23/18B01J23/002B01J37/10B01J37/343C07C67/08C07C69/54
Inventor 曾福海
Owner TIANJIN KERMEL CHEM REAGENT
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