Catalyst for direct synthesis of arene by synthesis gas and production method and use thereof

Abstract

The invention discloses a catalyst for directly synthesizing aromatic hydrocarbon by synthesis gas, which has the composition with following weight ratio: HNKF-5:aluminophosphate molecular sieve:Ga2O3:ZnO:BaO equal to 1:1-3:0.01-0.3:0.01-0.3:0.01-0.3. The invention has the advantages of simple technical process, medium catalyst acidity of aromatic hydrocarbon synthesis, better aromatization performance, and high aromatic hydrocarbon content.

Description

technical field [0001] The invention relates to a catalyst for directly synthesizing aromatic hydrocarbons from synthesis gas, a preparation method and application thereof, in particular to a catalyst, preparation method and application for synthesizing aromatic hydrocarbons from synthesis gas through methanol and dimethyl ether. Background technique [0002] Benzene, toluene, and xylene (BTX for short) are important organic chemical raw materials, mainly used to produce chemical products such as chemical fibers, plastics, and rubber. In recent years, with the continuous expansion of polyester production worldwide, the demand for PTA (terephthalic acid) and PX (paraxylene) has increased rapidly. Aromatics resources mainly come from catalytic reforming oil, pyrolysis gasoline and coal tar. With the development of the oil refining industry, the proportion of aromatics using petroleum as raw material is gradually increasing, accounting for more than 98% abroad and more than 85...

AI Technical Summary

Problems solved by technology

The process route of producing aromatics from methanol and dimethyl ether [Chinese patent 200610012703, EP0090284, EP0005287] has been explored, but this process is easily restricted by the fluctuation of the methanol market, and it is imminent to develop a process for directly producing aromatics from coal

There are not many reports in this work literature, such as N.Guan [Catalysis Today, 30 (1-3): 207-213, 1996] and the like using Cu-Fe / MnO+HZSM-5 and GaZSM-5 catalysts to synthesize aromatics; Wang Desheng et al [ Acta Catalytica Sinica, 23 (4): 333-335, 2002] Utilize Fe / MnO-ZnZSM-5 catalyst to make the low-carbon hydrocarbon intermediate that syngas generates in Fischer-Tropsch reaction directly convert into aromatics on molecular sieves, the process The selectivity of aromatic hydrocarbons is low, only reaching about 53%; Kaoru Fujimoto et al. 2 +H-ZSM-5or H-mordenite catalyst synthesizes aromatics through the route of methanol, olefins, and aromatics, and the selectivity of aromatics is low, only reaching about 50%.

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