| 摘要 |
1. A titanium-, zirconium- and/or hafnium- containing zeolite which a) contains, in addition to sodium and potassium, the elements silicon and aluminium and at least one element from the group consisting of titanium, zirconium and hafnium in the following ratio, expressed in molar ratios of oxides : (SiO2 +MO2 ):(0,02-0,30)Al2 O3 where M is titanium, zirconium and/or hafnium, and b) has, in the X-ray diffraction diagram, the characteristic signals listed below : Lattice plane distances d (8A) 11.4+-0.3 9.2+-0.2 7.6+-0.2 6.6+-0.1 5.7+-0.1 5.35+-0.1 4.56+-0.1 4.32+-0.1 4.16+-0.1 3.81+-0.1 3.75+-0.1 3.59+-0.1 3.30+-0.1 3.15+-0.1 2.86+-0.1 2.80+-0.1 Relative intensity I/IO strong to very strong weak weak to medium medium to strong weak to medium weak weak medium to strong strong weak medium to strong strong to very strong strong to very strong medium medium strong to very strong weak to medium where IO is the intensity of the strongest signal, and in which c) the ratio of silicon to titanium, zirconium and/or hafnium is : SiO2 /(SiO2 +MO2 )=0.4-0.99 expressed in molar ratios of the oxides, where M is titanium, zirconium and/or hafnium. |
