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Rubidium and Potassium Extraction from Granitic Rubidium Ore: Process Optimization and Mechanism Study
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-02-27 00:00:00 , DOI: 10.1021/acssuschemeng.7b04445 Peng Xing 1 , Chengyan Wang 1 , Baozhong Ma 1 , Ling Wang 1 , Wenjuan Zhang 1 , Yongqiang Chen 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-02-27 00:00:00 , DOI: 10.1021/acssuschemeng.7b04445 Peng Xing 1 , Chengyan Wang 1 , Baozhong Ma 1 , Ling Wang 1 , Wenjuan Zhang 1 , Yongqiang Chen 1
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Thus far, little is known about the use of granitic rubidium ore for the extraction of rubidium. Herein, we examined the extractability of rubidium and potassium from granitic rubidium ore via sulfuric acid baking, reductive decomposition, and alkaline leaching. In addition, the extraction mechanism was studied by using interdisciplinary approaches based on the mineralogy and thermodynamics. Under the optimum conditions, more than 94% and 92% of Rb and K were extracted, respectively. Mineralogical analysis suggests that the Rb is scatted in micas (biotite and muscovite) and potassium feldspar in the form of isomorphism. Micas were transformed into sulfates during the sulfuric acid baking process. Increasing the dosage of coal, the decomposition temperature, and the time was conducive to the decomposition of sulfates. The sulfates were transformed into aluminum oxide and potassium sulfate during the reductive decomposition process. The basic structure of potassium feldspar was unchanged in the stages of baking and decomposition. The feldspar was finally altered to cancrinite and zeolite in alkaline leaching. These phase transformations reveal the release approach of Rb and K from micas and feldspar.
中文翻译：
花岗岩Rub矿石中and和钾的提取：工艺优化及机理研究
迄今为止，对于使用花岗岩gran矿石提取rub知之甚少。在本文中，我们研究了通过硫酸焙烧，还原分解和碱浸从花岗岩rub矿石中提取and和钾的能力。此外，基于矿物学和热力学，采用跨学科方法研究了萃取机理。在最佳条件下，分别提取了94％和92％以上的Rb和K。矿物学分析表明，Rb以同构形式分散在云母（黑云母和白云母）和钾长石中。在硫酸烘烤过程中，云母被转化为硫酸盐。增加煤的添加量，分解温度和时间有利于硫酸盐的分解。在还原分解过程中，硫酸盐转化为氧化铝和硫酸钾。长石钾的基本结构在烘烤和分解阶段没有变化。在碱性浸出过程中，长石最终变成了斜晶石和沸石。这些相变揭示了云母和长石中Rb和K的释放方法。
更新日期：2018-02-27
中文翻译：
花岗岩Rub矿石中and和钾的提取：工艺优化及机理研究
迄今为止，对于使用花岗岩gran矿石提取rub知之甚少。在本文中，我们研究了通过硫酸焙烧，还原分解和碱浸从花岗岩rub矿石中提取and和钾的能力。此外，基于矿物学和热力学，采用跨学科方法研究了萃取机理。在最佳条件下，分别提取了94％和92％以上的Rb和K。矿物学分析表明，Rb以同构形式分散在云母（黑云母和白云母）和钾长石中。在硫酸烘烤过程中，云母被转化为硫酸盐。增加煤的添加量，分解温度和时间有利于硫酸盐的分解。在还原分解过程中，硫酸盐转化为氧化铝和硫酸钾。长石钾的基本结构在烘烤和分解阶段没有变化。在碱性浸出过程中，长石最终变成了斜晶石和沸石。这些相变揭示了云母和长石中Rb和K的释放方法。
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