Silicoaluminophosphate Molecular Sieves SAPO-11 and SAPO-41: Synthesis, Properties, and Applications for Hydroisomerization of C16+ n-Paraffins. Part 1: Current State of Research on SAPO-11 and SAPO-41 Synthesis (A Review)

The review presents an analysis of the distinctive features of the structure and synthesis of silicoaluminophosphate molecular sieves such as SAPO-11 and SAPO-41. Various crystallization types are described and compared, including dry-gel conversion (DGC), solvent-free crystallization, hydrothermal crystallization, solvothermal crystallization, and crystallization in ionic liquids. The crystallization mechanisms are discussed.