دورية أكاديمية
Synthesis of Analcime Crystals and Simultaneous Potassium Extraction from Natrolite Syenite
| العنوان: | Synthesis of Analcime Crystals and Simultaneous Potassium Extraction from Natrolite Syenite |
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| المؤلفون: | Jian Chen, Hongwen Ma, Changjiang Liu, Jiangyan Yuan |
| المصدر: | Advances in Materials Science and Engineering, Vol 2017 (2017) |
| بيانات النشر: | Hindawi Limited, 2017. |
| سنة النشر: | 2017 |
| المجموعة: | LCC:Materials of engineering and construction. Mechanics of materials |
| مصطلحات موضوعية: | Materials of engineering and construction. Mechanics of materials, TA401-492 |
| الوصف: | Analcime single crystals were successfully synthesized from natrolite syenite powder (K2O 10.89%) and 92.6% of potassium was extracted simultaneously by means of soda roasting followed by alkali-hydrothermal method. Effects of NaOH concentration, reaction temperature, and holding period on the analcime formation and potassium extraction were investigated systemically. The results indicated that NaOH concentration plays an important role in determining the chemical composition of zeolites and size distribution; by turning the NaOH concentrations, three different pure zeolites (i.e., the phillipsite-Na, the analcime, and the sodalite) were prepared. Besides, a higher temperature could accelerate the dissolution of K+ ions and enhance the crystallinity degree of zeolite. The reactions involved in the analcime synthesis can be summarized as follows: sodium aluminum silicate dissolution → precipitation and dissolution of metastable zeolite-P → analcime nucleation → analcime growth. The extraction ratio of K+ is associated with the types of synthesized zeolites, among which analcime is the most effective to promote potassium leaching out from zeolite lattice position. The optimal condition for analcime crystallization and K+ leaching is found to be as follows: 175°C for 4 h in 0.5 mol/L NaOH solution. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1687-8434 1687-8442 |
| Relation: | https://doaj.org/toc/1687-8434; https://doaj.org/toc/1687-8442 |
| DOI: | 10.1155/2017/2617597 |
| URL الوصول: | https://doaj.org/article/15b866d0d4ed40dcb2b2bc8d26a6cfe8 |
| رقم الأكسشن: | edsdoj.15b866d0d4ed40dcb2b2bc8d26a6cfe8 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 16878434 16878442 |
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| DOI: | 10.1155/2017/2617597 |