Effects of Non-Ionic Surfactant on the Deep Temperature Flotation Agents of Hematite

2012 ◽  
Vol 538-541 ◽  
pp. 2354-2357 ◽  
Author(s):  
Xiao Jun Jiang ◽  
Yun Jin Wang ◽  
Hong Bo Xu ◽  
Jian Wang
Keyword(s):  
Surface Tension ◽  
Fatty Acid ◽  
Polyethylene Glycol ◽  
Sodium Oleate ◽  
Ionic Surfactant ◽  
Low Carbon ◽  
Optimal Composition ◽  
Different Temperatures ◽  
Deep Temperature ◽  
Tension Methods

This investigation involves the effects of non-ionic surfactant materials on the industrial sodium oleate, sodium naphthenate and their mixtures at different temperatures by the surface tension methods. The effects on the critical micelle concentration (CMC) of sodium oleate were assessed by the Toween 80(T-80) presence, polyethylene glycol, polyether and other non-ionic surfactant. T-80 was proved more effective than other non-surfactant in increasing the sodium oleate CMC at same concentration. Using the optimal composition of sodium fatty acid and the surfactant can reduce the temperature of separation hematite from 43°C to 23°C, achieve the purpose of low carbon and energy saving.

Estimation of surface tension of fatty acid methyl ester and biodiesel at different temperatures

Fuel ◽  
2014 ◽  
Vol 126 ◽  
pp. 162-168 ◽  
Author(s):  
Suriya Phankosol ◽  
Kaokanya Sudaprasert ◽  
Supathra Lilitchan ◽  
Kornkanok Aryusuk ◽  
Kanit Krisnangkura
Keyword(s):  
Surface Tension ◽  
Fatty Acid ◽  
Methyl Ester ◽  
Fatty Acid Methyl Ester ◽  
Acid Methyl Ester ◽  
Acid Methyl ◽  
Different Temperatures

The Viscosity Measurement of Polyethylene Glycol Dilaurate

2011 ◽  
Vol 84-85 ◽  
pp. 641-645
Author(s):  
Tong Yu Chen ◽  
Yan Jun Liu ◽  
Qing Zhu
Keyword(s):  
Surface Tension ◽  
Liquid Crystal ◽  
Fatty Acid ◽  
Polyethylene Glycol ◽  
Phase Change ◽  
Carbon Chain ◽  
Viscosity Measurement ◽  
Chain Fatty Acid ◽  
Effects Of Temperature ◽  
Two Peaks

This paper mainly studied the Viscosity of polyethylene glycol dilaurate and the surface tension, discussing the effects of temperature, concentration, rotate speed on the viscosity. The results show that the viscosity of the long carbon chain fatty acid was higher than the short carbochain, and the viscosity decreasing trend with increase of the temperature. The internal structure of emulsion may take place changing due to the temperature changing. The liquid crystal disintegration or occurred phase change could result that the viscosity appeared the abrupt peak. The viscosity of emulsion maybe appear one or two peaks with the changing of concentration, that the viscosity decreasing with increase of the temperature and rotate speed.

scholarly journals Low-carbon cast microalloyed steel intercritically heat-treated at different temperatures: microstructure and mechanical properties

2021 ◽  
Vol 21 (2) ◽  
Author(s):  
Hadi Torkamani ◽  
Shahram Raygan ◽  
Carlos Garcia Mateo ◽  
Yahya Palizdar ◽  
Jafar Rassizadehghani ◽  
...  
Keyword(s):  
Carbon Content ◽  
Volume Fraction ◽  
Block Size ◽  
Tensile Tests ◽  
Total Elongation ◽  
Martensite Phase ◽  
Low Carbon ◽  
Steel Increase ◽  
Different Temperatures ◽  
The Impact

AbstractIn this study, dual-phase (DP, ferrite + martensite) microstructures were obtained by performing intercritical heat treatments (IHT) at 750 and 800 °C followed by quenching. Decreasing the IHT temperature from 800 to 750 °C leads to: (i) a decrease in the volume fraction of austenite (martensite after quenching) from 0.68 to 0.36; (ii) ~ 100 °C decrease in martensite start temperature (Ms), mainly due to the higher carbon content of austenite and its smaller grains at 750 °C; (iii) a reduction in the block size of martensite from 1.9 to 1.2 μm as measured by EBSD. Having a higher carbon content and a finer block size, the localized microhardness of martensite islands increases from 380 HV (800 °C) to 504 HV (750 °C). Moreover, despite the different volume fractions of martensite obtained in DP microstructures, the hardness of the steels remained unchanged by changing the IHT temperature (~ 234 to 238 HV). Applying lower IHT temperature (lower fraction of martensite), the impact energy even decreased from 12 to 9 J due to the brittleness of the martensite phase. The results of the tensile tests indicate that by increasing the IHT temperature, the yield and ultimate tensile strengths of the DP steel increase from 493 to 770 MPa, and from 908 to 1080 MPa, respectively, while the total elongation decreases from 9.8 to 4.5%. In contrast to the normalized sample, formation of martensite in the DP steels could eliminate the yield point phenomenon in the tensile curves, as it generates free dislocations in adjacent ferrite.

α-sulfonated fatty acid esters: II. Solution behavior of α-sulfonated fatty acid polyethylene glycol esters

1996 ◽  
Vol 73 (1) ◽  
pp. 31-37 ◽  
Author(s):  
Tomomichi Okano ◽  
Naoyuki Egawa ◽  
Masami Fujiwara ◽  
Masahiro Fukuda
Keyword(s):  
Fatty Acid ◽  
Polyethylene Glycol ◽  
Fatty Acid Esters ◽  
Solution Behavior ◽  
Acid Esters

Synthesis and Application of Itaconic Acid Water-Coke Slurry Dispersant

2017 ◽  
Vol 896 ◽  
pp. 167-174 ◽  
Author(s):  
Zhi Yuan Yang ◽  
Zhuo Yue Meng ◽  
Zhi Hua Li ◽  
Si Tong Wang
Keyword(s):  
Surface Tension ◽  
Polyethylene Glycol ◽  
Itaconic Acid ◽  
High Performance ◽  
Ph Value ◽  
Raw Materials ◽  
Esterification Reaction ◽  
Solution Ph ◽  
Powder Surface ◽  
Coke Powder

Polyethylene glycol (PEG-200) and itaconic acid (IA) were used as raw materials to compound macromer through esterification reaction. A new type of specialized water-coke slurry dispersant was synthesized by copolymerization of microware, sodium methallyl sulfonate (SMAS) and maleic anhydride (MA). The experiment showed that the concentration of slurry could be reached to 63% with the dosage of 0.2%, and the apparent viscosity was 1140.3 mPa∙s. Through the analysis of the infrared, the dispersant was confirmed to have polyethylene glycol branched chain and hydrophilic functional groups such as carboxyl or sulfonic group. When the concentration of dispersant was 30 g/L, the surface tension of water could be decreased from 72.70 mN/m to 45.50 mN/m. Furthermore, when the solution pH value was 9, the Zeta potential of semi-coke powder surface could also be decreased from-13.38 mV to-25 mV with the addition of dispersant. Thus, this dispersant could increase electronegativity of semi-coke powder surface, enhance steric-hindrance effect and prevent the phenomenon of powder flocculation and gather. Meantime, it also could reinforce the semi-coke hydrophilic by reducing the surface tension of water effectively. And then, the high performance water-coke slurry could be obtained.

Sign in / Sign up

Export Citation Format

Share Document