Preparation method of metal modified TS-1 titanium silicalite molecular sieve CO catalyst

Abstract

The embodiment of the invention provides a preparation method of a metal modified TS-1 titanium silicalite molecular sieve CO catalyst, which comprises the following steps: dissolving tetrapropylammonium bromide in deionized water to obtain a first mixed solution, and mixing a certain amount of butyl titanate and tetraethoxysilane to obtain a second mixed solution; dropwise adding the second mixed solution into the first mixed solution to obtain gel; putting the gel into a reaction kettle, carrying out hydrothermal crystallization for a period of time at a certain temperature, and filtering, washing and drying to obtain a TS-1 precursor; and dissolving metal salt in deionized water, adding the TS-1 precursor, adjusting the pH value to 5-6 by using ammonium chloride-ammonia water, stirring at a certain temperature to carry out ion exchange for a certain time, filtering, washing, drying, and roasting at 550 DEG C for 5 hours to obtain the metal modified TS-1 titanium silicalite molecular sieve CO catalyst. According to the invention, the porous structure of the molecular sieve can be maintained while new active sites are increased, so that the catalytic effect can be improved.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a preparation method of a metal-modified TS-1 titanium-silicon molecular sieve CO catalyst. Background technique [0002] Titanium-silicon molecular sieve is a kind of heteroatom molecular sieve, which is a new type of catalytic material in which titanium atoms are embedded in the molecular sieve framework. Titanium-silicon molecular sieve has excellent catalytic activity and selectivity as a catalyst, and has a wide range of uses in petrochemical, fine chemical and other fields. It was found that the introduction of different heteroatoms into the zeolite framework would endow the zeolite with catalytic properties for different reactions. [0003] Catalytic oxidation is a simple and effective solution to carbon monoxide (CO) pollution. However, at present, carbon monoxide catalysts often have the porous structure of molecular sieves, but there are not enough active...

AI Technical Summary

Problems solved by technology

However, the current carbon monoxide catalysts often have the porous structure of molecular sieves, but there are not enough active sites, and the catalytic effect is not ideal.