Preparation method and application of oil-soluble monodisperse metal oxide nanocatalyst

Abstract

The invention discloses a preparation method and application of an oil-soluble monodisperse metal oxide nano-catalyst; the preparation method includes the following steps: taking a solvent, adding metal alkoxide or metal inorganic salt to it, and preparing a metal salt solution; taking the solvent, adding it to the Adding a hydrolysis accelerator to prepare a hydrolysis accelerator solution; mixing the metal salt solution and the hydrolysis accelerator solution to obtain a reaction solution; aging the above reaction solution, washing and then dispersing it into a solvent to obtain a precursor dispersion; taking the surfactant , mix the precursor dispersion and the surfactant solution, and solvothermally treat it to obtain nano-metal oxide particles; after solvothermal, wash and dry the nano-metal oxide particles, and then disperse them in an organic solvent to obtain product. The one-dimensional size of the nanometer metal oxide particles is 2-35nm, and has monodispersity; the solid content of the dispersion is 1wt.%-60wt.%, and there is no settlement after standing for more than 6 months.

Description

technical field [0001] The present invention relates to the technical field of nanocatalysts; more specifically, it relates to a preparation method and application of a monodisperse metal oxide nanocatalyst, especially an oil-soluble monodisperse metal oxide nanocatalyst, a preparation method and application. Background technique [0002] As we all know, the core of catalytic reaction engineering is the catalyst, and catalytic reactions can usually be divided into homogeneous catalysis and heterogeneous catalysis. The former catalyst and the reactant are in the same phase, such as gaseous or liquid, without the existence of a phase interface to carry out chemical reactions; the latter are not in the same phase, and the reaction is carried out at the two-phase interface. Many important catalytic reactions in industry are mostly heterogeneous catalytic reactions, and the catalysts are solid substances, and the reactants are mostly gaseous or liquid. The catalyst capable of ho...

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Problems solved by technology

[0005] The ceria nanoparticles disclosed in the prior art, such as CN102557105 B, have the defects that the particle size of the ceria particles is too large, between 160 and 300nm; and the final product is a powder, which cannot be uniformly dispersed in the catalyst In the oil used in the process

The defect of the zinc oxide liquid phase dispersion disclosed in the prior art (such as CN108793226 A) is: the zinc oxide particles prepared by this method have weak crystallinity due to no hydrothermal, solvothermal or calcination treatment

The zinc oxide liquid dispersion disclosed in the prior art, such as CN1105621475 B, has the disadvantages of the method: the zinc oxide particles prepared by the method are not oil-soluble, and the liquid phase medium in which the particles are easy to disperse is water, methanol, ethanol, Highly polar solvents such as ethylene glycol and isopropanol have poor dispersibility in low-polarity solvents such as toluene, tetrahydrofuran, n-heptane, and cyclohexane, and cannot be uniformly dispersed in catalytic cracking, steam cracking, and catalytic cracking. In oil products used in other processes

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