Mesoporous ZSM-5 zeolite, mesoporous ZSM-5 zeolite-loaded metal sulfide catalyst and application

Abstract

The invention discloses mesoporous ZSM-5 zeolite, a mesoporous ZSM-5 zeolite-loaded metal sulfide catalyst and an application. The synthesizing method of the mesoporous ZSM-5 zeolite comprises the following steps: (1) after uniformly mixing diallylamine and concentrated hydrochloric acid, adding dimethyl diallyl ammonium chloride, uniformly stirring and reacting for 1-6 hours at 60-120 DEG C, and cooling to obtain a template agent DMMC (Dimethylol Methyl Carbamate); (2) preparing acidified aluminum sulfate liquor by aluminum sulfate, concentrated sulfuric acid and water; (3) adding water into water glass, uniformly stirring, adding NaOH, adding the template agent DMMC after cooling to room temperature, continuously stirring for 2-5 hours, then adding the acidified aluminum sulfate liquor under stirring, and stirring for 2-8 hours to obtain a gel in a final state; (4) crystallizing the gel in the final state obtained in the step (3), filtering, drying and calcining to obtain the mesoporous ZSM-5 zeolite. The mesoporous ZSM-5 zeolite-loaded metal sulfide catalyst prepared by taking the mesoporous ZSM-5 zeolite as a carrier is applied to hydrodesulfurization of 4, 6-dimethyl dibenzothiophene and hydrocracking reaction of n-decane, thereby greatly improving the raw material conversion ratio.

Description

(1) Technical field [0001] The invention relates to a mesoporous ZSM-5 zeolite, a mesoporous ZSM-5 zeolite-supported metal sulfide catalyst prepared by using the mesoporous ZSM-5 zeolite, and the catalyst added with 4,6-dimethyldibenzothiophene Application in hydrogen desulfurization reaction and hydrocracking reaction of n-decane. (2) Background technology [0002] ZSM-5 zeolite is a zeolite molecular sieve first developed by Mobil Company of the United States in 1972. It has a unique three-dimensional cross-channel system and relative flexibility to the requirements of hydrothermal synthesis systems. ). The zeolite has high thermal stability and hydrothermal stability, and its unique pore structure provides favorable conditions for shape-selective catalysis, and is widely used in the petrochemical industry. [0003] However, the pore size of ZSM-5 is still small (0.54×0.56nm), and it is difficult to realize the catalytic reaction of macromolecules, especially when the ki...

AI Technical Summary

Problems solved by technology

However, using carbon materials as templates, due to the weak interaction between carbon materials and inorganic species, the synthesis method is complicated, and it is difficult to realize industrial production.

Although using aminosilane as a soft templating agent overcomes the above weaknesses, the templating agent is expensive, making the cost of the product too high to be industrially acceptable

At the same time, the above synthesis methods all use the small molecule template agent tetrapropylammonium hydroxide (TPAOH), and use organic silicon (ethyl silicate) as the silicon source, which further increases the cost of the product

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