Preparing method for magnetic materials and application thereof

Abstract

The invention discloses a preparing method for magnetic materials and application thereof, and belongs to the field of material preparing and catalyzing. According to the method, ferroferric oxide Nano particles are prepared through a solvothermal method, wherein ferroferric oxide is used as the core part, and spherical Silicon dioxide Nano particles with the characteristic of monodispersity are used to cover the surface of the ferroferric oxide. Through the principle of coupled reaction, chlorosulfonic acid is adopted as a modification reagent to carry out modification on the core part which is covered with the silicon dioxide. The chlorosulfonic acid carries out modification on the core structure so that the modified core structure can be connected to Sulfonyl and then used for selectively adsorbing Fe 3+. After all the processes, the target product is finally obtained. The prepared magnetic materials can be used as the catalyst for synthesis of isoamyl acetate, and has the advantages of high catalytic activity, good reusability, and non-corrosion to apparatus. Besides, the magnetic materials can be easy to recycle and reuse as the catalyst.

Description

technical field [0001] The invention discloses that the invention relates to a preparation method and application of a novel magnetic catalytic material, and belongs to the field of material preparation and catalysis. Background technique [0002] With the rapid development of science and technology, magnetic nanoparticles have gradually entered people's field of vision, and various magnetic materials have been prepared. Compared with other magnetic materials, magnetic ferroferric oxide is the most widely used because of its excellent magnetic properties. Energy and large specific surface area make it easier to modify. Magnetic ferroferric oxide nanoparticles can be synthesized by many methods, but ferroferric oxide obtained by solvothermal synthesis has a larger specific surface area and better dispersion. However, magnetic Fe3O4 is easily acidified under acidic conditions and easily oxidized in air. These disadvantages greatly reduce its practicability to prevent the oxida...

AI Technical Summary

Problems solved by technology

The traditional theoretical production method of isoamyl acetate is: under the action of a catalyst, acetic acid and isoamyl ester undergo an esterification reaction. The traditional catalyst is concentrated sulfuric acid. However, it has been proved by experiments that using concentrated sulfuric acid as a catalyst can easily cause carbonization. phenomenon, the by-products are extremely complex, difficult to separate, and concentrated sulfuric acid is severely corrosive to equipment, and metal oxides are used as catalysts, the catalytic activity is low, and the temperature required for the reaction is high; using FeCl 3 , ZnCl 2 As a catalyst, there are disadvantages that the catalyst cannot be reused and the production cost is high. Since the above-mentioned catalysts all have obvious defects, it is necessary to find a more suitable catalyst, using magnetic materials as catalysts, which can be recovered and regenerated magnetically. , used in the synthesis of isoamyl acetate and achieved good results