What is ZSM-5 molecular sieve?

What is ZSM-5 molecular sieve?

Due to its good hydrothermal stability and catalytic performance, ZSM-5 molecular sieve has been widely used in the chemical industry. ZSM-5 molecular sieve has been widely used in China. It is mainly used in diesel hydrogen pour point depressing catalysts, fixed-bed catalytic cracking catalysts, The addition of ZSM-5 molecular sieve to the FCC catalyst in the fluidized bed catalytic cracking reaction has great benefits to increase the gasoline octane number and increase the olefin content of the gas. The ZSM-5 molecular sieve added by FCC catalysts at home and abroad is one of the most used ZSM-5 molecular sieves. The item is mainly concentrated in SiO2/Al2O3 (the molar ratio of silicon dioxide to aluminum oxide) between 40-50. Domestic FCC additives are widely used in reducing olefins in gasoline. In this regard, the application of Si02/A1203 is between 38-40. In addition, domestic and foreign residue catalytic cracking uses Si02/A1203 in the range of 25-30. Molecular sieve. In addition, ZSM-5 molecular sieve is widely used in shape-selective catalysis in chemical industry, such as p-diethylbenzene catalyst, xylene isomerization catalyst; in addition, in terms of environmental protection, the extraction of organic matter in water uses high-silicon ZSM-5 molecular sieve, Si02/A1203 Between 220-400. ZSM-5 molecular sieve synthesized directly with water glass and aluminum sulfate. This product is used as the precursor of catalysts for low-hydrocarbon alkylation, isomerization, aromatization, dewaxing and pour point reduction. It is the same as ZSM-5 synthesized with organic amines abroad. In comparison, the process is simple, the quality is stable, there is no pollution, the cost is low, and the hydrothermal stability is high.