| 摘要 |
PURPOSE:To manufacture crystals showing a specified X-ray diffraction pattern by forming a composition represented by a specified formula contg. an alkali metallic ion source, an org. nitrogen-contg. cation source, a silica source, an alumina soure and water in a specified molar ratio. CONSTITUTION:A composition contg. an alkali metallic ion source such as sodium hydroxide, an org. nitrogen-contg. cation source, that is, ammonium ion, a silica source such as silica powder, an alumina source such as colloidal alumina and water while satisfying SiO2/Al2O3>=10, R/(Si+Al)=1X10<-4>-1, OH<->/ (Si+Al)=0.1-0.5, H2O/(Si+Al)=5-100 and OH<->/H2O=1X10<-3>-1X10<-1> is maintained at >=80 deg.C to form crystals represented by the formula. The resulting composition is crytalline aluminosilicate zeolite having 4.27+ or -0.1, 4.10+ or -0.05, 3.90+ or -0.05 and 2.50+ or -0.03 as the X-ray lattice spacing values. |
