一种粉煤灰基低硅铝比双晶型分子筛的制备方法及应用
By controlling the silicon-to-aluminum ratio and alkali ratio in fly ash, low silicon-to-aluminum ratio NaA and NaX bicrystalline molecular sieves can be directly synthesized, solving the problem of needing to add additional silicon and aluminum sources in existing technologies, and achieving low-cost and efficient heavy metal removal.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG BAIMA LAKE LABORATORY CO LTD
- Filing Date
- 2026-04-27
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies require the addition of silicon and aluminum sources in the process of preparing molecular sieves from fly ash, and it is difficult to synthesize dicrystalline molecular sieves, resulting in low product purity and crystallinity, and high cost.
Using fly ash as raw material, without adding silicon or aluminum sources, low-silicon-aluminum-ratio NaA and NaX bicrystalline molecular sieves are synthesized by controlling the silicon-aluminum ratio, sodium carbonate calcination activation, and alkali ratio, and by aging and low-temperature hydrothermal crystallization.
A low-cost synthesis of low-silicon-to-aluminum ratio bicrystalline molecular sieve was achieved, which improved the resource utilization rate of fly ash and showed a high efficiency in removing heavy metals from low-concentration wastewater.
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Abstract
Citation Information
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