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国家自然科学基金(21306116)

作品数:9 被引量:30H指数:4
相关作者:李军金央邹达翁燕玲李丽萍更多>>
相关机构:四川大学更多>>
发文基金:国家自然科学基金更多>>
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9 条 记 录,以下是 1-9
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溶剂萃取法脱除盐酸法湿法磷酸中铁的研究被引量:8
2017年
研究了以磷酸三丁酯(TBP)为萃取剂,二甲苯为稀释剂,从盐酸法湿法磷酸中萃取Fe^(3+)时,TBP、盐酸、磷酸、氯化钙和Fe^(3+)浓度对Fe^(3+)萃取效果的影响。研究结果表明,Fe^(3+)萃取率和分配系数随着磷酸三丁酯、盐酸和磷酸浓度的增加而增加。Fe^(3+)分配系数与TBP和盐酸浓度分别呈4和2.5次方关系。氯化钙浓度低时,Fe^(3+)萃取率非常低;氯化钙浓度较高时,Fe^(3+)萃取率才会显著增加。在TBP体积分数为12.5%时,Fe^(3+)萃取率和分配系数随着Fe^(3+)浓度增加而降低;以此为有机相,3级错流萃取,可以使稀磷酸溶液中的Fe^(3+)质量分数由0.128%降至0.008%。用TBP为萃取剂从盐酸法湿法磷酸中萃取Fe^(3+)时,可以用二甲苯作稀释剂。
金央刘小红李军邹达李丽萍
关键词:磷酸三丁酯二甲苯磷酸
乳化萃取中乳状液的重力沉降和搅拌破乳研究被引量:2
2015年
乳化萃取是强化溶剂萃取的有效方法,可大大缩短反应时间、减小设备占地面积、提高萃取效率,但技术瓶颈是形成的乳状液破乳困难。采用了重力沉降和搅拌剪切法对乳化过程形成的油包水乳状液破乳,研究了2种方法的破乳机理、破乳率及破乳前后乳液微观粒径、显微镜图像的演变过程。结果表明:2种破乳方法结合可取得良好的破乳效果,破乳后两相间有明显的相界面,连续相内悬浮液滴数量急剧减少且液滴粒径显著变大,分布变窄。实验确定适宜的操作条件:搅拌速度为180 r/min、搅拌时间为5 min、静置时间为8 min,在此条件下破乳率可达到96%,临界液滴粒径为15μm。
陈溪李军金央莫珊吴世琴
关键词:破乳重力沉降搅拌液滴
超声波对磷酸三丁酯萃取磷酸过程的影响被引量:3
2015年
利用超声波对化工过程的强化作用,研究了超声波对磷酸三丁酯从盐酸法湿法磷酸中萃取磷酸过程的影响。研究表明,超声可以提高萃取速率,超声功率为300、500、700 W时的萃取速率分别是常规萃取速率的6、9、18倍。考察了磷酸三丁酯在超声作用下的稳定性,并对超声过后的乳状液进行了离心分离。为了强化两相混合,提出了一种椭球状超声波管路萃取器。
金央李军邹达翁燕玲王浩
关键词:超声波磷酸三丁酯萃取磷酸乳状液
盐酸法湿法磷酸净化生产工业磷酸二氢钾研究被引量:5
2017年
开发了一条溶剂萃取法净化盐酸法湿法磷酸生产工业磷酸二氢钾的工艺流程。该流程主要包括萃取除铁、萃取分离磷酸、制取磷酸二氢钾3个步骤。用二(2-乙基己基)磷酸逆流萃取盐酸法湿法磷酸中的3价铁离子,3价铁离子萃取率为88.27%,得到除铁粗磷酸。用磷酸三丁酯逆流萃取除铁粗磷酸,各组分萃取率从大到小的顺序为3价铁离子、磷酸、氯离子、氟离子、钙离子、铝离子、镁离子,磷酸萃取率为95.10%。对载磷酸有机相进行两次洗涤,钙离子脱除率达到99.36%。用去离子水逆流反萃洗后有机相,得到纯度较高、磷酸质量分数为16.38%的反萃磷酸。反萃磷酸与氯化钾反应,采用溶剂萃取法生产的磷酸二氢钾产品各项指标符合HG 2321—1992《磷酸二氢钾》工业一等品要求。
金央贾强方李军马誉景李彦宏
关键词:磷酸磷酸二氢钾磷酸三丁酯
Visual study on the characteristics of liquid and droplet in a novel rotor-stator reactor被引量:2
2019年
Rotor–stator reactor(RSR), an efficient mass transfer enhancer, has been applied in many fields. However,the hydrodynamic characteristics of liquid flow in RSR are still a mystery despite they are fundamental for the mass transfer performance and processing capacity. In view of the above, this paper studies the liquid–liquid flow and liquid holdup in RSR under various conditions with a high-speed camera. The paper firstly demonstrates two flow patterns and liquid holdup patterns that we obtained from our experiment and then presents in succession a flow pattern and a liquid holdup criterion for the transition of film flow to filament flow and complete filling to incomplete filling. It is found that experimental parameters, including rotor–stator distance, rotational speed and volume flow rate exert great influence on the average droplet diameter and size distribution. Besides, by comparison and contrast, we also find that the experimental values match well with our previous predicted calculations of the average diameter, and the relation between the average diameter and the mean energy dissipation rate.
Yubin WangJun LiYang JinMing ChenYan CaoJianhong Luo
关键词:LIQUIDHOLDUPDROPLETAVERAGEDROPLETDIAMETER
磷酸三丁酯萃取盐酸法湿法磷酸中铁的研究被引量:7
2015年
研究了磷酸三丁酯从盐酸法湿法磷酸中萃取三价铁离子的过程。研究了稀释剂种类以及磷酸三丁酯、盐酸、磷酸浓度对三价铁离子萃取率以及磷酸损失率的影响;研究结果表明:以煤油为稀释剂时磷酸三丁酯对三价铁离子的萃取效果较二甲苯为稀释剂时好;磷酸三丁酯、盐酸、磷酸浓度的增加对三价铁离子萃取率的影响是正向的;磷酸损失率随磷酸三丁酯浓度的增加而增加。用体积分数为10%的磷酸三丁酯逆流萃取盐酸法湿法磷酸中的三价铁离子,三价铁离子萃取率达到100%,磷酸损失率为2.44%。
金央李军李维邹达
关键词:湿法磷酸磷酸三丁酯萃取盐酸
Liquid–liquid two-phase mass transfer characteristics in a rotating helical microchannel被引量:4
2019年
In this work,the mass transfer characteristics of two immiscible fluids were investigated in a rotating helical microchannel with hydraulic diameter of 932μm.Aqueous phosphoric acid solution and 80%tri-n-butyl phosphate(TBP)in kerosene were selected for the investigation of mass transfer performance in quartz glass/high density polyethylene(HDPE)microchannel.High dispersion between the two immiscible fluids can be obtained in the microchannel due to the intensifying action of centrifugal force,and the majority of the droplets with average diameter of 20–100μm were produced in the microchannel.The flow rate and rotation speed were found to have great effects on the extraction efficiency and average residence time.The empirical correlation of average residence time based on experimental data was developed by theoretical analysis and data fitting method,and a mathematical model of the mass transfer coefficient in dispersed phase was proposed.
Yan CaoJun LiYang JinJianhong LuoYubin Wang
关键词:IMMISCIBLEMULTIPHASE
乳化法萃取湿法磷酸的破乳研究
2014年
采用乳化法萃取湿法磷酸,并对乳状液破乳。研究了超声破乳和离心破乳对乳状液破乳效果的影响。研究表明:乳状液自然沉降破乳时,乳状液中液滴的聚并缓慢,所需破乳时间很长;采取超声破乳方法,当超声时间为15 min、超声功率为40 W时,破乳率可以达到80%;采取离心破乳方法,当离心转速为2 000 r/min、离心时间为3 min时,破乳率可达97%。此外,实验还对超声与离心联合作用于乳状液破乳的方法做了进一步研究。
翁燕玲金央李军贾旭宏吴昊游
关键词:湿法磷酸乳状液离心
Simulation of drop breakage in liquid–liquid system by coupling of CFD and PBM: Comparison of breakage kernels and effects of agitator configurations被引量:2
2019年
This work focuses on drop breakage for liquid-liquid system with an adoption of numerical simulation by using computational fluid dynamics and population balance model (PBM) coupled with two-fluid model (TFM). Two different breakage kernels based on identical breakage mechanism but different descriptions of breaking time are take n into account in this work. Eight cases corresp on ding to distinct configurations of agitator are carried out to validate numerical predictions, namely agitators with different porosity and hole diameters, respectively implemented in Cases 1 to 5 and Cases 6 to 8. The results are compared with experimental data for testing the applicability of both kernels. Simulations are implemented, in this work, with an approach of class method for the solution of population balance model by the special-purpose computational fluid dynamics solver Fluent 16.1 based on finite volume method, and the grids used for meshing the solution domain are accomplished in a commercial software Gambit 2.4.6. The effects of configurations of agitator corresponding to different parameters mentioned above on final Sauter mean diameter are equally concentrated in this work. Analysis of both kernels and comparisons with experimental results reveal that, the second kernel has more decent agreement with experiments, and the results of investigations on effects of agitator configurations show that the in fluences of these parameters on Sauter mean diameter are marginal, but appropriate porosity and hole diameter are actually able to decrease Sauter mean diameter. These outcomes allow us to draw general conclusions and help investigate performances of liquid-liquid system.
Rui XieJun LiYang JinDa ZouMing Chen
关键词:LIQUID-LIQUIDBREAKAGEAGITATOR
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