Synthetic zeolite with the faujasite structure is prepd. with compsn. Na2O.Al2O3. (3.0-5.0) SiO2. nH2O; where n = 0-8. The zeolite is made by crystallisation of a reaction mixt. contg. Na2O, Al2O3, SiO2 and H2O. The novelty is that the pptn. and crystallisation of the faujasite-aluminosilicate gels occurs at 60-105 degrees C in the presence of zeolite A. The pref. mol. ratios in the reaction mixt., ignoring the zeolite A, are SiO2/Al2O3 = 7.0-30.0; Na2O/SiO2 = 0.3-1; H2O/Na2O = 10.50. The pref. amt. of zeolite A is 1-20, esp. 3-15 wt.% calculated as water-free solid w.r.t. the solid faujasite constituents. The hydrothermal synthesis pref. takes 3-48, esp. 6-24 hours with stirring, and using technical water-glass as the source of SiO2.
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机译：制备具有八面沸石结构的合成沸石。与compsn。 Na2O.Al2O3。 （3.0-5.0）SiO2。 nH2O;其中n = 0-8。沸石通过反应混合物的结晶制得。续Na2O，Al2O3，SiO2和H2O。新颖之处在于pptn。沸石A的存在下，八面铝铝硅酸盐凝胶的结晶和结晶发生在60-105℃。摩尔忽略沸石A，反应混合物中的比率为SiO 2 / Al 2 O 3 ＝ 7.0-30.0。 Na2O / SiO2 = 0.3-1; H 2 O / Na 2 O ＝ 10.50。偏好。 amt。沸石A的摩尔数为1-20，特别是。按无水固体重量计3-15重量％固体八面沸石成分。水热合成法。需要3-48，特别是。搅拌6-24小时，并使用工业水玻璃作为SiO2的来源。
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