Feldspar synthesis Zeolite molecular sieve

Feldspar is an aluminosilicate mineral containing alkali metals such as Na, K, Ca and alkaline earth metals. According to its chemical composition, it can be divided into different types of feldspar. Among them, potassium feldspar is widely used in the synthesis of zeolite molecular sieves, and its chemical formula is K (AlSi3O8). The crystal structure of potassium feldspar is a framework structure formed by three-dimensional silicon aluminum oxide tetrahedron, Therefore, the silica alumina tetrahedron of potassium feldspar is very stable, its acid alkali solubility is poor, and it has a high melting point and thermal stability. Therefore, the activation of potassium feldspar requires relatively high temperature and pressure.