COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Shuo Liu,Fangxu Li
In order to overcome the limitations of fatty amines (FAS) and reduce consumption and costs, this study developed a high-efficiency flotation system that FAS with methyl isobutyl methanol (MIBC). Single mineral flotation results showed that MIBC enhanced the collecting ability of decamine (DCA), dodecylamine (DDA), tetradecylamine (TDA), and hexadecylamine (HCA) while reducing their dosage. At pH 3, recoveries for DCA, DDA, TDA, and HCA were 63.22 ± 1.34 %, 86.284 ± 4.33 %, 72.30 ± 3.34 %, and 40.02 ± 2.27 %, respectively. With MIBC added, these increased to 89.43 ± 1.87 %, 89.58 ± 2.66 %, 73.38 ± 4.27 %, and 79.60 ± 2.23 %. Batch flotation experiments also demonstrated that lepidolite recovery by DDA and HCA rose from 96.64 % and 36.47–96.70 % and 98.29 %, respectively. Surface tension and viscosity detection revealed that the addition of MIBC to FAS resulted in a decrease in surface tension and an increase in solution viscosity. The adsorption, zeta potential, contact angle and foaming property tests indicated that MIBC can enhanced the recovery of lepidolite by adjusting the adsorption densities of DCA and DDA, as well as modifying the bubble properties of TDA and HDA in the flotation pulp. These findings highlighted the critical role of bubble properties in lepidolite flotation systems, going beyond mere hydrophobicity effects.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2023
·
IF 4.1
Mengdi Xu,Fangyu Guo,Xicheng Bao,Xiahui Gui,Yaowen Xing,Yijun Cao
In the flotation process, the frother, which is typically a surfactant, can be added to the pulp to reduce the surface tension and create stable foam. Currently, the nonionic mixed surfactant is widely employed as the frother for fine coal flotation. In this study, we focused on examining the foam properties of a mixed surfactant comprising short-chain methyl isobutyl carbinol (MIBC) and long-chain polyethylene glycol-1000 (PEG). Analytical techniques such as surface tension measurement, dynamic foam stability measurement, bubble morphology observation, and foam film drainage measurement were used to investigate the foam properties in single and mixed surfactant solution from a macroscopic scale to a microscopic scale. The surface tension results indicated that PEG exhibited higher surface activity than MIBC, and the addition of PEG to MIBC resulted in a significant reduction in solution surface tension. The dynamic foam stability analysis revealed that the incorporation of a small amount of PEG into MIBC solution notably improved foam stability. Furthermore, the addition of PEG to the MIBC solution led to a shift in the bubble size distribution curve from a “double peak” to a “single peak” shape. This shift indicated a substantial reduction in bubble size, indicating an enhanced inhibition of bubble coalescence. Additionally, the liquid film drainage rate was significantly slowed down, and the stability of the liquid film was improved upon the addition of PEG to MIBC. This improvement can be attributed to the synergistic effect of MIBC and PEG molecules adsorbed at the gas–liquid interface. The synergistic effect of mixed MIBC–PEG was due to the additional surface tension gradient created by the difference in surface activity between PEG and MIBC. This surface tension gradient enhances the Marangoni flow of surfactant molecules, thereby improving the self-healing ability of the liquid film and increasing its stability.
研究领域:
矿物加工工程
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界面化学
·
浮选工艺
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Geochemistry
·
2024
·
IF 2.6
Guanghui Li,Zheyi Zhang,Qian Wei,Fen Jiao,Congren Yang,Wei Li,Wenqing Qin
In this study, a new process of pre-flotation decarbonization‑lead flotation‑zinc flotation was proposed to recover valuable metals from a lead‑zinc ore in Guizhou by beneficiation and to determine a reasonable and economic beneficiation process. The results of the study demonstrate that the novel process aids in the flotation of lead and zinc ores in two ways: (1) pre-decarbonization using MIBC (methyl isobutyl carbinol) and kerosene synergistically achieved the lowest loss of lead recovery of 1.94 % and zinc recovery of 1.14 % in the decarbonized product. (2) the successful separation and retrieval of lead and zinc metals were accomplished via a preferential flotation technique, using several combinations of reagents. This procedure yielded a lead recovery rate of 87.64 % and a zinc recovery rate of 94.09 %.
研究领域:
矿物加工工程
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冶金工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 11
·期 1
·48-56
·
IF 3.119
Yingjie Hu,Yuxin Mei,Baining Lin,Xuhong Du,Fan Xu,Huasheng Xie,Kang Wang,Yonghua Zhou
The one-pot synthesis of methyl isobutyl ketone (MIBK) and methyl isobutyl methanol (MIBC) from acetone and hydrogen is a typical cascade reaction comprised of aldol condensation-dehydration-hydrogenation. Pd loss and aggregation during long term operation are typical problems in industrial application. In this paper, an active and stable catalyst was achieved with defective UiO-66 as a support for Pd, which was synthesized with the ratio 15 : 1 of ZrOCl2·8H2O to ZrCl4 as Zr-precursors. The resultant Pd catalyst remained active for at least 1000 h with a MIBK + MIBC selectivity of 84.87–93.09% and acetone conversion of 45.26–53.22% in a continuous trickle-bed reactor. Besides the increased Brønsted acid amount generated by the defect sites was favorable for the activity, the cavity confinement in the UiO-66 (R = 15 : 1) structure also efficiently prevented Pd loss and aggregation during the long term run. The contrast of the characterization of the fresh and used Pd/UiO-66 (R = 15 : 1) indicated that the deactivation of the catalyst was attributed to carbonaceous accumulation on the catalyst surface, which could be easily regenerated by calcination. This work supplied a new alternative for the design and utilization of industrial catalysts for MIBK and MIBC synthesis.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Jialong Bai,Jieyu Yi,Weiwang Chen,Long Kang,Zhiqiang Zhang
Frothers not only modify gas–liquid interfacial properties, but also alter coal particle surface properties, thereby influencing bubble–coal particle interactions in froth flotation processes. While previous studies have focused on frothers’ effects on gas-liquid interfaces, their impact on coal surface hydrophilicity and coal-bubble interactions remains underexplored. In this study, we measured the bubble–coal interactions using an anthracite coal sample under varying concentrations of MIBC and DF250 frothers during attachment and detachment processes of coal, in combination with surface tension measurement, XPS, FTIR, contact angle measurements, and quantum chemistry calculations. The results demonstrate that both MIBC and DF250 will adsorb on the coal surface and impart hydrophilicity onto it. Increasing frother concentration will render the coal surface more hydrophilic, which will prolong liquid drainage time (t drain ) and enhance the attachment repulsive force (F adr ) during bubble–coal particle attachment. At the same time, this also will decrease the detachment attraction force (F det ) of coal particle. In the examined concentration range, DF250 exhibits more pronounced effects than MIBC, meaning that it is less suitable for coal flotation. For both frothers and in the studied concentration range, F adr consistently exceeds F det , meaning that immediately removal of coal-bubble aggregates from the mixing zone of flotation cell seems to be desirable. In addition, regardless of the presence or absence of frother in water and the structure difference in MIBC and DF250, the contact angle of coal surface should be a good indicator of the strength of coal-bubble interactions.
研究领域:
矿物加工工程
·
界面化学
·
量子化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2023
·
IF 5.2
Yannan Liang,Hainan Wang,Ruoqian Zhou,Danlong Li,Haijun Zhang
In recent years, ultrasonication has been used to enhance flotation process. Gas bubble is the unique carrier during mineral flotation, and thus its characteristics play an important role. However, the bubble rising characteristics under ultrasound action are not clear. Therefore, this paper aims to investigate the effect of ultrasonication on bubble rising behaviors in deionized water and MIBC (Methyl Isobutyl Carbinol) solution. A laboratory visualization system of bubble motion with ultrasonication was designed based on the high-speed dynamic video technology to record the bubble rising process and analyze bubble rising characteristics. Bubble aspect ratio was found to increase with the surfactant concentration increasing, but the rising velocity was in opposite state. In each solution, a significantly higher bubble sphericity was observed with ultrasonication than that without ultrasonication, conversely, the bubble rising velocity was smaller under the action of ultrasonication. A roughly negative linear relationship was found between the bubble shape and rising velocity, and the ultrasonication diminished this relationship. Marangoni effect was considered as the cause of MIBC affecting the bubble motion, and possible explanations of ultrasonication affecting the bubble motion were given from the perspective of bubble surface wave, cavitation bubble oscillation and sound radiation force.
研究领域:
矿物浮选
·
流体力学
·
超声技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）