The synthesis and characterization of heteroatomic substituted aluminophosphates by Zr atom

The aluminophosphate (APO 4 -n) molecular sieves, invented in 1980's by Union carbide (UOP at present) (1), were known for the 3rd decedent molecular sieves. The framework of the serials of zeolites were comprised of tetrahedrons of AlO 4 - and PO 4 - by turns, as a result, such zeolites shows the neutral electricity and weak acidity. The introduction of the heteroatom in the skeleton of APO 4 -n zeolite, such as (Si, Mo, Co, etc.) (2), broken down the electronic balance of the framework of aluminophosphates, leading to them. abstaining more water absorption and acidity, consequentially, more and more chemists have focused on such field.