Aluminum oxide loaded polyamide short fiber composite solid acid catalyst, and preparation method thereof

Abstract

The invention discloses an aluminum oxide loaded polyamide short fiber composite solid acid catalyst. The aluminum oxide loaded polyamide short fiber composite solid acid catalyst is prepared from, by weight, 40 to 50 parts of beta-aluminum oxide, 7 to 9 parts of sepiolite, 35 to 45 parts of silicon dioxide, 8 to 10 parts of zirconium oxide, 12 to 16 parts of polyamide short fiber, 2 to 3 parts of aluminum sulfate, 15 to 18 parts of aminopropyltriethoxysilane, 4 to 6 parts of glycidyl methacrylate, and an appropriate amount of water. According to a preparation method, an aluminum sulfate aqueous solution is used for surface acidification of sepiolite, and then silicon dioxide is loaded with an obtained product uniformly so as to obtain a stable Mg-O-Si covalent structure, and a stable Al-O-Si covalent structure, wherein the structure of SiO2 is not destroyed in the loading process, and specific surface area of the obtained compound is relatively large; at the same time, polyamide short fiber particles are added, and are connected with the surface of aluminium oxide via adhesion so as to increase adsorption capacity and inhibit leaching of catalyst active components. Acid value is high; cost is low; catalytic effect is excellent; and the aluminum oxide loaded polyamide short fiber composite solid acid catalyst can be recycled for a plurality of times.

Description

technical field [0001] The invention relates to the technical field of solid acid catalysts, in particular to an alumina-loaded nylon short fiber composite solid acid catalyst and a preparation method thereof. Background technique [0002] Diethyl ether has a wide range of uses. In the chemical industry, it is mainly used as an excellent solvent for oils, dyes, alkaloids, fats, resins, nitrocellulose, hydrocarbons, linseed oil, rosin resin, spices, and non-vulcanized rubber. In the pharmaceutical industry, it is used for drug production. It can be used as extractant and medical anesthetic; used as oil cleaning agent in wool spinning and cotton spinning industry; it can also be used in gunpowder industry to make smokeless gunpowder. [0003] At present, liquid acid such as concentrated sulfuric acid is still used as a catalyst in the actual chemical production process to produce ether. Although it has the advantages of low price, low reaction temperature, high conversion rate...

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Problems solved by technology

[0003] At present, liquid acid such as concentrated sulfuric acid is still used as a catalyst in the actual chemical production process to produce ether. Although it has the advantages of low price, low reaction temperature, high conversion rate, and high reactivity, there are serious corrosion of equipment, residual liquid and Wastewater has serious environmental pollution, harsh operating conditions, difficult post-processing of products, many by-products, poor selectivity, and difficulty in continuous production in technology, which cannot meet the needs of current environmental protection and economic development; although existing technologies have A small number of enterprises use solid acid catalysts such as alumina or molecular sieves, but there are defects such as easy dissolution, poor stability, short life, easy deactivation, wide acid strength distribution, small pore size, easy carbon deposition, and complex surface properties of the catalyst.