4A Zeolite Powders with Micron Size are Produced by In-situ Synthesis Process
The 4A zeolite powder with micron standard size D10＞1 μm,D50 between 2 and 4 μm,D90＜10 μm are synthesized from solid materials in situ process.The largest particle size of zeolite A with 6.86 um is produced at the molar ratio of sodium oxide to alumina 2.8,whereas the molar ratio of sodium oxide to alumina is 1.6,the 72.7％is the highest crystallinity value.The molar ratio of sodium oxide to alumina has great influence on the zeolite purity and crystallinity value of the synthesized products,but has little effect on the products particle size,this result is completely different from the traditional theory of synthesize zeolite A.
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