Molecular sieve loaded cu-co Schiff base complex and its preparation method and application

Abstract

The invention discloses a molecular sieve supported Cu-Cp Schiff base complex, and a preparation method and application thereof. A method of 'building a ship in a bottle' is employed for packaging a complex in molecular sieve, thus the complex is prevented from forming dimer, multimer or peroxides, and the catalytic oxidation activity of the complex is kept. The complex has high catalytic oxidation efficiency on sulfides in gasoline and is easy to recover and reuse, and gasoline subjected to sulfide degradation is high in recovery rate and high in reutilization rate. The preparation method is simple in operation and has industrial practicality.

Description

technical field [0001] The invention relates to the field of gasoline desulfurization, in particular to a catalyst for removing organic sulfur in FCC gasoline, its preparation method and application. Background technique [0002] SO 2 It is one of the main pollutants in the atmosphere. Its excessive presence in the air can lead to environmental problems such as acid rain. With the development of the automobile industry, the penetration rate of automobiles has increased year by year. As an indispensable source of power, gasoline has a huge annual consumption amount, the SO produced by the combustion of organic sulfides in gasoline 2 become SO in the atmosphere 2 One of the main sources of gasoline, and 80% to 90% of the sulfur in finished gasoline comes from FCC gasoline components, that is, catalytically cracked gasoline. Therefore, the key to reducing the sulfur content of finished gasoline is to reduce the sulfur content of FCC gasoline. [0003] Therefore, FCC gasoline...

AI Technical Summary

Problems solved by technology

Among them, the adsorption desulfurization method and the extraction desulfurization method are mainly based on the polarity of the sulfur compounds in gasoline to separate them. For organic sulfur compounds that are difficult to remove from thiophenes, these two methods cannot completely remove them. organic sulfide

However, the photocatalytic method is still in the theoretical research stage, and the problems of light source selection and long reaction time have not been solved, and the economic cost is high, and there is still a long time before large-scale industrial use.

[0007] Catalytic oxidation desulfurization method is to use catalyst to catalyze oxidant and sulfide to undergo oxidation-reduction reaction, change its polarity to make it easy to remove the compound, such as the Chinese journal "Industrial Catalysis", 2003, 11 (9), 1-4, published A method of using balancer, titanium dioxide, powdery clay and granular clay as catalysts, and oxygen as oxidant to catalyze oxidative desulfurization. After the above-mentioned desulfurization catalyst is optimized, the desulfurization rate can reach 63.12%, and the granular desulfurization effect is the best. The recovery rate of white clay to gasoline is too low to be discussed

Another example is the Chinese patent CN102633842A, which discloses a preparation method and application of a bimetallic reactive center ionic liquid desulfurizer, which prepares a desulfurizer with a functional group -CH 2 Cl or -SO 2 The organoiron-cobalt metal Schiff base type complex of Cl, the disclosed catalysts are all ionic liquids with benzene ring macromolecular structure, the synthesis process requires more than 6 steps of reaction, the synthesis steps are cumbersome, the preparation process is complicated, and the industrial applicability is poor

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