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1. Thermal regeneration of spent CeY sorbent used for thiophene adsorption from benzene | |||
LV longfei,LIAO Junjie,XIE Yuanyuan,FAN Lijun,CHANG Liping,BAO Weiren | |||
Chemical Engineering 05 August 2016 | |||
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Abstract:Benzene is an important chemical raw material, and coking benzene is one of its main resources, so the thiophene impurity should be deeply removed. The CeY adsorbent prepared by NaY zeolite ion-exchanging by cerium ion has been reported an excellent adsorption desulfurization ability. Thus it is necessary to investigate its regeneration behavior. In this paper, the spent CeY sorbent adsorbing thiophene in benzene (TBY) was regenerated by thermal treatment under various conditions. The desulfurization efficiency of regenerated TBY samples was measured by static adsorption experiment. The results show that the regeneration temperature, regeneration time and oxygen content are the main influence factors for the regeneration of TBY samples. The regenerated performance of sorbent is mainly affected by sulfur and carbon content remained. The optimized regeneration condition is air atmosphere with the space velocity of 1000 h-1 at 500 oC for 1 h, and the corresponding desulfurization efficiency of regenerated TBY sample is over 96%. | |||
TO cite this article:LV longfei,LIAO Junjie,XIE Yuanyuan, et al. Thermal regeneration of spent CeY sorbent used for thiophene adsorption from benzene[OL].[ 5 August 2016] http://en.paper.edu.cn/en_releasepaper/content/4701982 |
2. Solid-liquid phase diagram for indomethacin-nicotinamide-methanol or methanol/ethyl acetate mixture and solubility behavior of 1:1 indomethacin-nicotinamide cocrystal at (298.15 and 313.15) K | |||
SUN Xiaowei,YIN Qiuxiang,XIE Chuang | |||
Chemical Engineering 19 December 2014 | |||
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Abstract:Solid-liquid equilibrium data for indomethacin (IMC) and nicotinamide (NCT) in both methanol (MeOH) and methanol/ethyl acetate (EA) mixture were measured using static method at (298.15 and 313.15) K under atmospheric pressure. 1:1 IMC-NCT cocrystal and IMCoMeOH was found in both systems under investigated conditions. The solubility of 1:1 IMC-NCT cocrystal was correlated using a mathematical model considering solution complexation. Solubility of IMC-NCT cocrystals as a function of co-former (NCT) concentration was evaluated. It's found that temperature has great effects on the formation of methanol solvate in the investigated systems. Solvate formation could be suppressed either by increasing temperature or using solvent mixtures. Additionally, solvent mixtures could level out the solubility differences between IMC and NCT, resulting in larger and more symmetric region for IMC-NCT cocrystal which would be helpful to the development of the 1:1 IMC-NCT cocrystallization process. | |||
TO cite this article:SUN Xiaowei,YIN Qiuxiang,XIE Chuang. Solid-liquid phase diagram for indomethacin-nicotinamide-methanol or methanol/ethyl acetate mixture and solubility behavior of 1:1 indomethacin-nicotinamide cocrystal at (298.15 and 313.15) K[OL].[19 December 2014] http://en.paper.edu.cn/en_releasepaper/content/4623875 |
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