酸活化钠膨润土和高岭土粘土：物理化学性质的比较研究。
Acid-activated Sodium Bentonite and Kaolin Clay: Comparative Study by Physicochemical Properties.
机构信息
Department of Mechanical Engineering, North Eastern Regional Institute of Science and Technology (Deemed to be University, Govt. of India), Nirjuli, Itanagar, Arunachal Pradesh 791109, India.
出版信息
Comb Chem High Throughput Screen. 2020;23(5):433-445. doi: 10.2174/1386207323666200311114349.
AIMS AND OBJECTIVE
This paper aims to reveal the useful industrial aspects of kandite and montmorillonite group of clays using as a catalyst after acid activation. A comparative study of modified characteristics of clay samples has been explored based on industrial requirements.
MATERIALS AND METHODS
In this study sodium bentonite and kaolin clay have been focused. The modified characteristics of clay samples are investigated by characterization methods of FT-IR, XRD, SEM/EDAX, TGA and DSC before and after treated with 4M of Hydrochloric acid. Clay samples were refluxed at 105ºC and calcined at 500ºC consecutively for 3 hours at room temperature.
RESULTS
Maximum crystalline size 104.02 nm has been evaluated for acid-activated sodium bentonite. Alkyl halides compounds have a strong band position for all samples and have more extent on acid activation. The small numbers of manganese particles have been noticed in the acidactivated samples. 14% of decrement and 61.02% of increment of aluminates have been found respectively for acid-activated kaolin and acid-activated sodium bentonite.
CONCLUSION
The novelty of this study is about sodium bentonite characterization and the results show the prominent behaviour with structural, elemental, morphological, and thermal analysis. Acid-activated kaolin sample has less effect in comparison with acid-activated sodium bentonite. As the removal of the hydroxyl group of compounds has been reported through FT-IR and XRD analysis also some other industries like ceramic and paper industries may have accepted these types of modified minerals for special production with a simple process.
目的和目标
本论文旨在揭示坎迪特和蒙脱石族粘土在酸活化后用作催化剂的有用工业方面。根据工业要求，探索了改性粘土样品特性的比较研究。
材料和方法
本研究集中在钠膨润土和高岭土上。通过 FT-IR、XRD、SEM/EDAX、TGA 和 DSC 等表征方法，研究了粘土样品在经 4M 盐酸处理前后的改性特性。粘土样品在 105°C 回流并在室温下连续煅烧 3 小时，温度为 500°C。
结果
评估了酸活化钠膨润土的最大结晶尺寸为 104.02nm。所有样品均具有较强的烷基卤化物化合物的波段位置，并且在酸活化时具有更大的程度。在酸活化样品中注意到锰颗粒的数量较少。酸活化高岭土和酸活化钠膨润土分别发现了 14%的减损和 61.02%的铝酸盐增量。
结论
本研究的新颖之处在于对钠膨润土的特性进行了表征，结果表明在结构、元素、形态和热分析方面表现出了突出的性能。与酸活化钠膨润土相比，酸活化高岭土的效果较小。通过 FT-IR 和 XRD 分析也表明，化合物的羟基已经被去除，因此一些其他行业，如陶瓷和造纸行业，可能已经接受了这些类型的改性矿物，用于特殊生产，工艺简单。
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