| 摘要 |
The invention concerns a preformed synthetic zeolite selected from the group consisting of Y, omega zeolite, offretite, erionite, L zeolite, ferrierite whose Si/Al atomic ratio rf ranges from 1.5 to 100, the preformed synthetic zeolite being obtained from a preformed aluminosilicic material whose Si/Al atomic ratio ri is lower than rf and ranges from 0.5 to 90m by treating said material with a silica-containing product, in the presence of at least one organic or inorganic base. The zeolite is particularly useful in sorption in ionic mixing or in heterogeneous catalysis. |
