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Effect of F-T Wax on the Blending Properties of Paraffin Wax
Peng Yida,Dai Yongchuan,Zhao Dezhi,Feng Shuo,Zhang Zhe,Yin Yunzhi
Abstract
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704
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Paraffin wax was blended with F-T wax. The effects of the mass fraction of F-T wax on paraffin 46
#
and 58
#
were investigated respectively. The results show that the addition of F-T wax can significantly increase the melting point of paraffin, when the mass fraction of F-T wax increases from 0.05% to 30.00%, the melting point of 46
#
and 58
#
blended wax drops from 72.4 ℃ to 44.4 ℃, and drops from 88.4 ℃ to 62.4 ℃, respectively. With the increase of the mass fraction of F-T wax, the melting point and penetration of blended wax decrease continuously, that is, the mass fraction of F-T wax is inversely proportional to the drop melting point and penetration. The analysis of the crystalline structure of the blended wax shows that, the content of non-isoparaffins in the blended wax is higher. So its crystal structure is an array of inclined lattice arrangement of the long needlelike wax crystals, and the natural paraffin crystallization is different with others, which composition is more complex.
2018, 38 (02): 13-15.
DOI:
10.3969/j.issn.1672-6952.2018.02.003
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Degradation of Methyleneblue in Water by Microwave Radiation and Hydrogen Peroxide
ZHAO Feixing, DAI Yongchuan, SONG Guanlong, MENG Xiange, DAI Zhuqing
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508
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The synergy effect of microwave/peroxide degradation of the methyleneblue in water is investigated in this study. The initial concentration of substrate, pH, and amount of hydrogen peroxide are examined to see their effect on the degradation performance, respectively. The results show that microwave and hydrogen peroxide have obvious synergy on degradation of methylene blue. In this experiment, the more concentrated of hydrogen peroxide, the more degradation to the methyleneblue. The degradation is enhanced noticeably under appropriate pH, the lowest degradation is noticed at the pH of 6~7. With higher initial concentration of methylene blue, the degradation rate is reduced. The degradation of methyleneblue is a first order reaction, of which the reaction rate constant is 0.189 8 min-1 and the activation energy is 2.76 kJ/mol. The degradation rate can be as high as 95.0%~96.0% in the following conditions: initial concentration 50~70 mg/L, the mass fraction of hydrogen peroxide 1.0wt%, 473 K for 7 min, pH=3 or 12.
2014, 34 (1): 16-19.
DOI:
10.3696/j.issn.1672-6952.2014.01.005