Petrifaction

        Molecular sieve is a synthetic zeolite. Like natural zeolite, it is a hydrated aluminosilicate crystal. In its crystal structure, there are many pores with uniform pore size and large pores on the inner surface. The pores are only allowed to have a larger diameter than the pore size Small molecules enter, which separates molecules of different sizes and shapes. Play the role of screening molecules, so it is called molecular sieve. This molecular sieve screening property has been widely used in the petrochemical industry.