Hydrothermally synthesized zeolites based on kaolinite: A review

• Many types of zeolites have been developed based on kaolinite in previous years.
• This review focuses on the current reports of kaolinite-based zeolites and the important factors in their synthesis.
• Among the factors discussed are the effect of SiO2/Al2O3(Si/Al) molar ratio of the gel mixture, metakaolinization time and temperature, aging condition, alkalinity, and crystallization time and temperature.
• This review only covers the most recent kaolinite-based zeolite papers published from 2005 to present.
• A brief discussion on the evolution of zeolites is also included.

Many types of zeolites have been developed based on kaolinite in previous years. This review focuses on the current reports of kaolinite-based zeolites and the important factors in their synthesis. Among the factors discussed in this review are the effect of SiO2/Al2O3 (Si/Al) molar ratio of the gel mixture, metakaolinization time and temperature, aging condition, alkalinity, and crystallization time and temperature. This review only covers the most recent kaolinite-based zeolite papers published from 2005 to present. A brief discussion on the evolution of zeolites is also included.