ZEOLITES CONTAINING TITANIUM, ZIRCONIUM AND/OR HAFNIUM, PROCESS FOR PRODUCING THEM AND THEIR USE

摘要

1. A titanum-, zirconium- and/or hafnium-containing zeolite which a) contains silicon, aluminium, sodium, potassium, at least one element from the group consisting of titanium, zirconium and hafnium and an organic ammonium compound in the following ratio : (SiO2 +MO2 ):(0,02-0,30)Al2 O3 :(0,05-0,30)(Na2 O+K2 O):(0,- 01-0,30) R2- O, expressed in molar ratios of the oxides, where M is equal to titanium, zirconium and/or hafnium, R denotes ammonium radicals of the general formulae (HOCH2 CH2 )4 N, (HOCH2 CH2 )3 R**1N or (HOCH2 CH2 )2 R**1R**2N, and the radicals R**1 and R**2 can be identical or different and denote alkyl, substituted alkyl, cycloalkyl, substituted cycloalky, aryl, substituted aryl or hydrogen, and b) has, in the X-ray diffraction diagram, the characteristic signals listed in Table 1 : TABLE 1 Lattice plane distances d (8A) 11.5+-0.3 9.2+-0.2 7.6+-0.2 6.6+-0.1 6.3+-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 2.67+-0.1 2.49+-0.1 Relative intensity I/IO strong to very strong weak weak to medium medium to strong weak weak weak weak to medium strong weak medium to strong strong to very strong strong to very strong medium medium strong to very strong weak to medium weak to medium weak to medium wherein in the Table, IO denotes the intensity of the strongest signal and wherein c) (SiO2 /SiO2 +MO2 )=0.4-0.99, expressed in molar ratios of the oxides.