Preparation method of magnetically supported titanium-silicon molecular sieve catalyst and special impact ultrasonic micro-mixing reactor

Abstract

The invention relates to a method for producing a magnetic-loaded titanium silicon molecular sieve catalyst and special equipment of the method. The method for producing the magnetic-loaded titanium silicon molecular sieve catalyst comprises the following steps: colliding a mixture solution of soluble ferric salt and soluble nickel salt with ammonia spirit and then completely mixing under condition of sonic oscillation; obtaining ferrous acid nickel powder through a hydro-thermal reaction, and then mixing titanate hydrolysate with estersil hydrolystate to produce tianium silicon sol, and thenadding ferrous acid nickel powder into the tianium silicon sol, finally producing the magnetic-loaded titanium silicon molecular sieve catalyst through steps of hydro-thermal reaction, filtering, washing, drying and annealing. The colliding ultrasonic micro hybrid reactor used by the method is to install two nuzzles capable of colliding and mixing mixture solution mixed by soluble ferric salt andsoluble nickel salt with ammonia spirit in the reactor. in the invention, the magnetic is used nanoparticle as carrier; surface of the magnetic nanoparticle is cladded with a titanium silicon compound; high catalytic activity of the titanium silicon molecular sieve catalyst is maintained relatively, and solid-liquid separation is preformed under additional condition of magnetic field and a purpose of efficiently reclaiming the catalyst is achieved.

Description

[0001] technical field [0002] The invention relates to a method for preparing a magnetically separable magnetic-loaded titanium-silicon molecular sieve catalyst and special equipment for the preparation. Background technique [0003] Titanium silicate molecular sieve is a new type of catalyst material, which can be used in organic oxidation reactions involving hydrogen peroxide as a green oxidant, such as ammoxidation of cyclohexanone to cyclohexanone oxime, epoxidation of olefins, partial oxidation of alkanes, oxidation of alcohols And the hydroxylation of aromatic rings, etc. The environmental pollution problem of the traditional organic oxidation process is avoided. As a catalyst, titanium silicate molecular sieve has the advantages of high product selectivity, mild reaction conditions, economy, energy saving and environmental friendliness. [0004] The particle size range of the titanium-silicon molecular sieve catalyst is about 0.1-15 μm, and the smaller the particl...

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Problems solved by technology

[0006] The above-mentioned patents load titanium-silicon molecular sieves on large particle carriers, which is easy to filter and recover catalyst particles, but the specific surface area and effective active sites of the catalysts are lost to varying degrees, which reduces the catalytic activity and selectivity of titanium-silicon molecular sieve catalysts.

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