FIELD: inorganic chemistry. SUBSTANCE: method involves two-stages process of reaction mixture crystallization containing reagents at the following mole ratios: SiO2/Al2O3= 20-60; OH-/SiO2= 0,1-0,2; H2O/SiO2= 20-60. The first stage is carried out at 240-325 C for 1-20 min, the second stage is carried out in the opened capacity at 50 -100 C for 60-240 h. After the first crystallization stage mixture is cooled for 10-120 s. Mineralizers and seed crystal are added to the reaction mixture at concentration 5-400 wt.-% of SiO2 content in the mixture. EFFECT: improved method of zeolite preparing. 4 cl, 1 dwg
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PROCESS FOR PREPARING CRYSTALLINE ZEOLITE ALUMOSILICATES HAVING SiO/AlO ≥ 20 MOLAR RATIO NOT LESS THAN 20% | 1990 |
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Authors
Dates
1995-01-20—Published
1990-06-13—Filed