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A kind of preparation method of sulfur carbon-based solid acid catalyst

A solid acid catalyst, sulfur-carbon-based technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc. Less problems, etc., to achieve the effect of improved catalytic effect, enhanced acid strength, and high catalytic activity

Active Publication Date: 2021-08-31
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, according to the above literature, there are many studies on sulfur-containing carbon materials and various preparation methods, but there are still relatively few studies on sulfur-containing carbon-based solid acids, and the research on this type of solid acids is not deep. The study of this type of solid acid is also to solve the problem of insufficient catalytic activity of carbon-based solid acids in the past, and the catalytic activity tends to decrease when they are used repeatedly. Under such conditions, it is necessary to develop a carbon-based solid acid with excellent catalytic activity. , and it is difficult to reduce the catalytic activity even if it is used repeatedly

Method used

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  • A kind of preparation method of sulfur carbon-based solid acid catalyst
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  • A kind of preparation method of sulfur carbon-based solid acid catalyst

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preparation example Construction

[0031] The preparation method of the sulfur-carbon-based solid acid of the present invention has a carbonization process, which mixes a carbon source and a sulfur source for heating and carbonization; and a sulfonation process, which combines the sulfur-containing carbon carrier obtained through the carbonization process with a concentrated At least one of the group consisting of sulfuric acid, oleum, sulfur trioxide and chlorosulfonic acid is sulfonated, and the sulfur-carbon-based solid acid catalyst of the present invention and the preparation methods of these substances are described in detail below.

[0032] The raw material of the sulfur-carbon-based solid acid of the present invention is the carbon source and the sulfur source. As long as at least a part of it is heated to form a carbon layer structure, the sulfonic acid group can be introduced, and there is no special limitation on the carbon source. In the carbon-based solid acid of the present invention Among solid ac...

Embodiment 1

[0041] After mixing the cellulose and sulfur uniformly according to a certain ratio of 10:1, weigh a certain mass of the mixture and carbonize it at 440°C under nitrogen to obtain a black solid which is the sulfur-containing carbon carrier; : 1 mass ratio, after sulfonation in oil bath at 150°C for 6 hours, after cooling, washing, filtering, and drying, sulfur carbon-based solid acid is obtained; the sulfur content is 6.0% through analysis, and sulfur carbon is obtained through analysis In addition to the sulfonic acid group in the structure of the thiocarbon-based solid acid, the thiocarbon-based solid acid generally contains S=O, C-S-C and O=S=O. In a reactor with a condensation reflux device, the thiocarbon-based solid acid and methanol According to the ratio of 1g:5ml, react in a heating device with a constant speed magnetic stirring device, and react at a temperature of 70°C for 2 hours, and the conversion rate of oleic acid is calculated to be 50.1%; then take quantitativ...

Embodiment 2

[0043] After mixing cellulose and sulfur uniformly according to a certain ratio of 2:1, weigh a certain mass of the mixture and carbonize it at 440°C under nitrogen to obtain a black solid that is the sulfur-containing carbon carrier; : 1 mass ratio, after sulfonation at 150°C for 6 hours, cooling, washing, filtering, and drying, the sulfur-carbon-based solid acid is obtained; the sulfur content is 16.4% as determined by the sulfur analyzer, and is obtained by XRS analysis. In addition to the sulfonic acid group in the structure of the thiocarbon-based solid acid, the structure of the thiocarbon-based solid acid has O=S=O, C-S-C, S-S. In a reactor with a condensing reflux device, the thiocarbon-based solid acid and methanol According to the ratio of 1g:5ml, react in a heating device with a constant speed magnetic stirring device, and react at a temperature of 70°C for 2 hours, and the conversion rate of oleic acid is calculated to be 68.6%; then, take quantitative cellulose and...

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Abstract

A preparation method of a sulfur-carbon-based solid acid catalyst. The method is to mix a carbon source and a sulfur source in a certain proportion for carbonization to obtain a black solid product. After cooling and grinding, add a sulfonating agent for sulfonation, and then cool, After filtering and drying, a sulfur-carbon-based solid acid catalyst is obtained. The sulfur content of the solid acid catalyst is increased, the specific surface area and pore diameter are increased, and the catalyst structure is more regular and orderly.

Description

technical field [0001] The invention relates to a preparation method of a carbon-based solid acid catalyst, in particular to a preparation method of a sulfur-carbon-based solid acid catalyst. [0002] technical background [0003] Inorganic acids are widely used in industrial reactions such as esterification, isomerization, and hydrolysis. Although they have high catalytic activity, they have a series of problems such as serious corrosion of equipment and difficult separation and purification of products. Therefore, the development of a green, non-polluting, easy-to-recycle, and highly active catalyst has become a trend. Solid acids have the advantages of strong acidity, non-toxicity, high activity, and easy recovery and recyclability, which have increasingly attracted people's attention. In addition, carbon-based solid acid is easy to prepare, low in cost, loaded with a large number of sulfonic acid groups, carboxyl groups and phenolic hydroxyl functional groups on the surfa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/22
CPCB01J27/22
Inventor 申曙光马雪平彭欣周子键李叶慧袁书娟温幸
Owner TAIYUAN UNIV OF TECH
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