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《中国化学工程学报(英文版)》 2008-02
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Density and Excess Molar Volume of Binary Mixtures of p-Xylene+Acetic Acid and o-Xylene+Acetic Acid at Different Temperatures and Pressures

YANG Tianyu,XIA Shuqian,DI Zhiguo and MA Peisheng School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China  
A new apparatus was designed with a thick-walled glass capillary,electric heater tube with red copper and heat preservation.The thick-walled glass capillary was used for its advantages of resistance to acid corrosion and pressure,and ease of observation.The experimental densities over the entire range of mole fraction for the bi- nary mixture of p-xylene+acetic acid and o-xylene+acetic acid were measured using the new apparatus at tempera- tures ranging from 313.15K to 473.15K and pressure ranging from 0.20 to 2.0 MPa.The density values were used in the determination of excess molar volumes,VE.The Redlich-Kister equation was used to fit the excess molar volume values,and the coefficients and estimate of the standard error values were presented.The experimental re- sults prove that the density measurement apparatus is successful.
【Fund】: Supported by China Petrochemical Corporation(X505012)
【CateGory Index】: O621.2
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