Preparation method of high efficient sulfonated carbon solid acid catalyst

Abstract

The invention relates to a preparation method of a high efficient sulfonated carbon solid acid catalyst. According to the method, biomasses and aromatics, which are treated as reaction monomers, are used to form carbon materials with abundant surface aromatic structures through a solvent heat carbonization method, and are sulfonated by concentrated sulfuric acid to obtain the solid acid catalyst with high acid amount and high stability. The method has the outstanding characteristics that: the biomasses are used as a precursor, the aromatics are introduced, effective aromatic sulfonation is guaranteed through providing a lot of aromatic nuclei, a lot of sulfonic acid groups can be introduced, the sulfonated coal solid acid prepared with the aromatics has a higher catalytic efficiency than sulfonated coal solid acids with no aromatics added, so aromatic adding plays an important role in sulfonation; and the catalyst has the advantages of controllable acid amount, high reaction activity and good stability, can be recovered, performs excellent activity and cyclical stability in a series of organic reactions such as synthesis of biodiesel and fine chemicals, conforms to the requirements of modern society, is environment friendly, and possesses a wide application prospect.

Description

technical field

[0001] The invention belongs to the technical field of catalysts, and relates to a method for preparing a sulfonated carbon solid acid catalyst, in particular to a method for preparing a carbonaceous solid acid catalyst by sulfonating a carbon material whose surface is rich in aromatic ring structures. Background technique

[0002] Carbonaceous solid acid catalysts have the advantages of high catalytic efficiency, good stability, easy recycling and reuse, environmental friendliness, low price and renewability. The surface of carbonaceous solid acid rich in sulfonic acid groups, due to the strong acidity of sulfonic acid groups, it can replace some reactions catalyzed by homogeneous acids such as concentrated sulfuric acid, and can also catalyze some reactions that molecular sieves with lower acidity cannot catalyze. Therefore, the carbonaceous solid acid catalyst can be used in reactions such as esterification reaction, hydrolysis of cellulose, alkylation rea...

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