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Solid acid catalyst suitable for microwave-assisted reaction and preparation method of solid acid catalyst

A solid acid catalyst, microwave-assisted technology, used in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as unfavorable separation, inconvenient storage and sales, and achieve good reusability. Good performance and stable structure

Active Publication Date: 2014-09-10
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, although the carbon-based solid acid catalyst has good catalytic activity, the catalyst exists in the form of irregular powder, which is not conducive to the separation of the reaction system from the reaction system in the later stage, and also brings some inconvenience to storage and sales.

Method used

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  • Solid acid catalyst suitable for microwave-assisted reaction and preparation method of solid acid catalyst
  • Solid acid catalyst suitable for microwave-assisted reaction and preparation method of solid acid catalyst
  • Solid acid catalyst suitable for microwave-assisted reaction and preparation method of solid acid catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0028] After the corn was dedusted and impurity removed, it was crushed through an 80-mesh sieve, dried at a constant temperature of 50°C for 4 hours, and then carbonized in a muffle furnace at 400°C for 2 hours to obtain an activated carbon carrier. The activated carbon carrier after carbonization was impregnated with concentrated sulfuric acid in a stirred environment for sulfonation reaction. The mass ratio of activated carbon to concentrated sulfuric acid was 1g:10ml, and the sulfonation reaction was stirred at a constant temperature of 90°C for 1h at a low speed, and the stirring rate was 300rpm.

[0029] After the reaction, wash with distilled water until neutral, mix the sulfonated product with iron filings powder, zeolite and appropriate amount of dextrin evenly, the weight ratio is 1:0.1:0.2:0.08, and granulate by extrusion spheronization, extruder The rotation speed is 130 rpm, the diameter of the extrusion template hole is 1 mm, and the diameter distribution of 90% o...

Embodiment 2

[0033] After the black beans were dedusted and impurity removed, they were crushed through an 80-mesh sieve, dried at a constant temperature of 60°C for 3 hours, and then carbonized in a muffle furnace at 500°C for 1 hour to obtain an activated carbon carrier. The carbonized activated carbon carrier is impregnated with concentrated sulfuric acid in a stirring environment for sulfonation reaction. The mass ratio of solid particles to concentrated sulfuric acid is 1g:15ml. Stir the sulfonation reaction at a constant temperature of 70°C for 3 hours at a low speed, and the stirring rate is 100rpm .

[0034] After the reaction was finished, wash with distilled water until neutral, and the sulfonated product was mixed with Fe 2 o 3Powder, zeolite and appropriate amount of sodium carboxymethyl cellulose are mixed evenly, the weight ratio is 1: 0.05: 0.15: 0.1, the method of extrusion spheronization is used to granulate, the speed of the extruder is 130 rpm, and the diameter of the e...

Embodiment 3

[0037] After the soybeans were dedusted and impurity removed, they were crushed through an 80-mesh sieve, dried at a constant temperature of 80°C for 1 hour, and then carbonized in a muffle furnace at 250°C for 3.5 hours to obtain an activated carbon carrier. The carbonized activated carbon carrier is impregnated with concentrated sulfuric acid in a stirring environment for sulfonation reaction. The mass ratio of solid particles to concentrated sulfuric acid is 1g:8ml. Stir the sulfonation reaction at a constant temperature of 120°C for 1 hour at a low speed, and the stirring rate is 100rpm .

[0038] After the reaction, wash with distilled water until neutral, mix the sulfonated product with alumina powder, zeolite and appropriate amount of starch evenly, the weight ratio is 1:0.08:0.12:0.05, and granulate by extrusion spheronization, the extruder speed 130 rpm, the diameter of the extrusion template hole is 1.2mm, and the diameter of 90% of the spherical particles after sphe...

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Abstract

The invention discloses a solid acid catalyst suitable for a microwave-assisted reaction and a preparation method of the solid acid catalyst. The preparation method comprises the following steps: with grains or beans as a raw material, crushing, high-temperature carbonizing, concentrated sulfuric acid sulfonation, wet granulation after washing, and calcining to obtain the solid acid catalyst. The solid acid catalyst provided by the invention is simple to operate, short in period and low in cost in the whole preparation process, and is a novel solid acid catalyst which resists high temperature and is suitable for a microwave environment.

Description

technical field [0001] The invention relates to the technical field of solid catalysts, in particular to a method for preparing a solid acid catalyst suitable for microwave-assisted reactions. Background technique [0002] The application of microwave technology in the field of assisted chemical reactions can be traced back to 1986. R. Gedye from Canada found in experiments that compared with traditional heating methods such as water bath heating, oil bath heating, and electric heating, the reaction of microwave assisted chemical synthesis The speed is greatly improved. The biggest advantage of microwave-promoted organic chemical reactions is that the reaction rate is fast and the conversion rate is high. It strengthens the reaction process and can shorten the reaction time from hours to minutes or even seconds. At the same time, the reaction conversion rate is similar or higher than that of traditional heating methods. Since then, microwave-assisted chemical reactions have...

Claims

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Application Information

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IPC IPC(8): B01J29/04B01J29/00B01J35/08C11C3/10C10L1/02
CPCY02E50/13Y02E50/10
Inventor 崔政伟陈海英邵艺陈榆中
Owner JIANGNAN UNIV
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