Synthesis, characterization, and physico-chemical aspects of a new PVC-based quaternary triethanol ammonium chloride anionite for tungsten recovery.

IF 1.3 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Turkish Journal of Chemistry Pub Date : 2024-03-13 eCollection Date: 2024-01-01 DOI:10.55730/1300-0527.3678

Bahig Atia

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引用次数: 0

Abstract

The usability of polyvinyl chloride-based quaternary triethanol ammonium chloride anionite (PVC-TEAC) as a potential extractant for tungstate was investigated to recover tungstate from Gabal Qash Amir, Egypt, assaying 70.91% WO₃. Structure elucidation for PVC-TEAC anionite was successfully carried out using several techniques. Experimental measurements, such as pH, agitation time, initial tungsten concentration, anionite dose, co-ions, temperature, and eluting agents, have been optimized. It was found that PVC-TEAC anionite has a maximum capacity of 63 mg per gram. From the distribution isotherm modeling, Langmuir's model fits the experimental results better than Freundlich's, with a theoretical value of 61.728 mg g^-1. According to kinetic modeling, the first- and second-order modeling may be regarded as a mixed modeling for a successful adsorption system. Thermodynamic prospects reveal that the adsorption process was predicted as an exothermic, spontaneous, and preferable adsorption at low temperatures. Tungsten ions can be eluted from the loaded anionite, by 1M H₂SO₄ with a 97% efficiency rate. It was found that PVC-TEAC anionite reveals good separation factor (S.F.) towards most of co-ions. A successful Alkali fusion with NaOH flux followed by tungstate recovery by PVC-TEAC anionite is used to obtain a high-purity tungsten oxide concentrate (WO₃), with a tungsten content of 78.3% and a purity of 98.75%.

查看原文本刊更多论文

用于钨回收的新型聚氯乙烯基季铵盐氯化铵的合成、表征和物理化学方面的问题。

研究了聚氯乙烯基季铵盐（PVC-TEAC）作为潜在的钨酸盐萃取剂的可用性，从埃及 Gabal Qash Amir 回收了钨酸盐，化验结果为 70.91% WO3。使用多种技术成功地阐明了 PVC-TEAC 阴离子石的结构。对 pH 值、搅拌时间、初始钨浓度、阴离子石剂量、共离子、温度和洗脱剂等实验测量进行了优化。结果发现，PVC-TEAC 阴离子石的最大容量为每克 63 毫克。从分布等温线模型来看，Langmuir 模型比 Freundlich 模型更适合实验结果，理论值为 61.728 mg g-1。根据动力学模型，一阶和二阶模型可视为成功吸附系统的混合模型。热力学前景显示，吸附过程被预测为放热、自发和低温下的优选吸附。用 1M H2SO4 可以从负载的阴离子石中洗脱钨离子，洗脱效率高达 97%。研究发现，PVC-TEAC 阴离子石对大多数共离子具有良好的分离系数（S.F.）。在成功地与 NaOH 通量进行碱熔合后，再用 PVC-TEAC 阴离子石回收钨酸盐，从而获得了高纯度的氧化钨精矿（WO3），其中钨含量为 78.3%，纯度为 98.75%。

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来源期刊

Turkish Journal of Chemistry 化学-工程：化工

CiteScore

2.40

自引率

7.10%

发文量

审稿时长

3 months

期刊介绍： The Turkish Journal of Chemistry is a bimonthly multidisciplinary journal published by the Scientific and Technological Research Council of Turkey (TÜBİTAK). The journal is dedicated to dissemination of knowledge in all disciplines of chemistry (organic, inorganic, physical, polymeric, technical, theoretical and analytical chemistry) as well as research at the interface with other sciences especially in chemical engineering where molecular aspects are key to the findings. The journal accepts English-language original manuscripts and contribution is open to researchers of all nationalities. The journal publishes refereed original papers, reviews, letters to editor and issues devoted to special fields. All manuscripts are peer-reviewed and electronic processing ensures accurate reproduction of text and data, plus publication times as short as possible.