当前位置: X-MOL 学术J. Supercrit. Fluids › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Optimization of boric acid extraction from ulexite mineral by using supercritical carbon dioxide
The Journal of Supercritical Fluids ( IF 3.9 ) Pub Date : 2020-08-14 , DOI: 10.1016/j.supflu.2020.104998
Sercan İpeksever , Mehmet Gönen

The utilization of carbon dioxide (CO2) in chemical processes is one plausible solution for decreasing greenhouse gases in the atmosphere. Herein, a boric acid extraction process was developed utilizing CO2 as a leaching agent. Three-factor three-level Box-Behnken design model was employed to investigate and optimize process variables of temperature, pressure and reaction time for reactive extraction from ulexite mineral using carbon dioxide. A 91.8 % boric acid extraction yield was obtained at 70 °C and 9 MPa with a reaction time of 170 min. At the end of reaction, the heterogeneous mixture was separated by vacuum filtration. The presence of Na (8.72% wt.) in EDX analysis confirmed the crystallized powder has sodium borate. The filter cake was determined as calcium carbonate from the XRD and FTIR analyses. Utilizing supercritical CO2 as a leaching agent is a viable solution to sequester CO2 collected as calcium carbonate while also producing commercially relevant boric acid.



中文翻译:

利用超临界二氧化碳优化从钠钙石矿物中提取硼酸的工艺

在化学过程中利用二氧化碳(CO 2)是减少大气中温室气体的一种可行解决方案。本文中,利用CO 2开发了硼酸提取工艺作为浸出剂。采用三因素三级Box-Behnken设计模型研究和优化温度,压力和反应时间的过程变量,以利用二氧化碳从方钠石矿物中进行反应性萃取。在70°C和9 MPa下,反应时间为170分钟,获得91.8%的硼酸萃取率。反应结束时,通过真空过滤分离非均质混合物。在EDX分析中Na的存在(8.72重量%)证实了结晶的粉末具有硼酸钠。通过XRD和FTIR分析确定滤饼为碳酸钙。利用超临界CO 2作为浸出剂是一种可行的解决方案,可以隔离以碳酸钙形式收集的CO 2,同时还可以生产商业上有用的硼酸。

更新日期:2020-08-14
down
wechat
bug