Insight into the kinetic behavior of microwave-assisted synthesis of NaX zeolite from lithium slag

Huang, Sumei; Wang, Ye; Lin, Zhang; Zhu, Shenjie; Cui, Qi; Ma, Zhen; Rajagopalan, Ranjusha

doi:10.1039/d3nj02260a

Cited by 11 publications

(1 citation statement)

References 35 publications

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“…According to Lin et al [10], lithium slag was used to prepare co-crystalline zeolite FAU/LTA-0 by the hydrothermal method that utilized mother liquid. It was directly used as a raw material by Huang et al [11] to synthesize NaX zeolite using a hydrothermal and microwave-assisted method, and the zeolite had smaller grains (0.5-0.8 µm) and good stability. Wang et al reported that zeolite A with excellent crystallinity can be synthesized under hydrothermal conditions using lithium slag activated by the new mild alkali fusion method [12].…”

Section: Introductionmentioning

confidence: 99%

Insight into the Growth Mechanism of Low-Temperature Synthesis of High-Purity Lithium Slag-Based Zeolite A

Li,

Xu,

Liu

et al. 2024

Materials

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The utilization of lithium slag (LS), a solid waste generated during the production of lithium carbonate, poses challenges due to its high sulfur content. This study presents a novel approach to enhancing the value of LS by employing alkali fusion and hydrothermal synthesis techniques to produce zeolite A at low temperatures. The synthesis of high-purity and crystalline lithium-slag-based zeolite A (LSZ) at 60 °C is reported for the first time in this research. The phase, morphology, particle size, and structure of LSZ were characterized by XRD, SEM, TEM, N2 adsorption, and UV Raman spectroscopy, respectively. High-purity and crystalline zeolite A was successfully obtained under hydrothermal conditions of 60 °C, an NaOH concentration of 2.0 mol/L, and a hydrothermal time of 8 h. The samples synthesized at 60 °C exhibited better controllability and almost no byproduct of sodalite occurred compared to zeolite A synthesized at room temperature or conventional temperature (approximately 90 °C). Additionally, the growth mechanism of LSZ was elucidated, challenging the traditional understanding of utilization of lithium and enabling the synthesis of various zeolites at lower temperatures.

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Section: Introductionmentioning

confidence: 99%