Ultrasonic speeds in dense liquid of 1,1,1,2,2-pentafluoro-3,3-dichloropropane and 1,1,2,2,3-pentafluoro-1,3-dichloropropane

被引：5

作者：

Takagi, T ^{[1
]}

Fukushima, M

机构：

[1] Kyoto Inst Technol, Fac Engn & Design, Dept Chem, Sakyo Ku, Kyoto 6068585, Japan

[2] Asahi Glass Co Ltd, New Technol Dev Ctr, Chiba 2900058, Japan

来源：

THERMOCHIMICA ACTA | 1998年 / 317卷 / 01期

关键词：

ultrasonic speed; high pressure; CF3CF2CHCl2; CClF2CF2CHClF; cleaning agents;

D O I：

10.1016/S0040-6031(98)00366-9

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The ultrasonic speeds in the liquid phase of 1,1,1,2,2-pentafluoro-3,3-dichloropropane, CF3CF2CHCl2 and 1,1,2,2,3-pentafluoro-1,3-dichloropropane, CClF2CF2CHClF, which have been developed as new cleaning agents, were measured by a sing-around technique operated at a frequency of 2 MHz. The measurements were carried out at 283-343 K and pressures up to 30 MPa with an uncertainty within +/-0.2%. The results for each isotherm show the linear relation with densities and are correlated by the Tait equation with a reasonable accuracy in the whole range of conditions. It is found that these substances, showing lower ultrasonic speed similar to that in 1,1,2-trichloro-1,1,3-trifluoroethane, CCl2FCClF2 have excellent characteristics of cleaning agents. (C) 1998 Elsevier Science B.V.

引用

页码：65 / 72

页数：8

共 33 条

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