Azeotrope-like compositions of 1,1,3,3-pentafluorobutane

A kind of technology of pentafluorobutane composition, applied in the field of binary azeotrope-like composition

Inactive Publication Date: 2006-10-18
THE CHEMOURS CO FC LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But many HFCs have only limited solvency for electronics industry co...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Example 1: Effect of Steam Leakage on Steam Pressure

[0094]The initial composition was charged into a container at a temperature of 40°C and the vapor pressure of the composition was measured. The composition was allowed to leak from the container while maintaining a constant temperature of 40°C until 50% by weight of the initial composition was removed, at which point the vapor pressure of the remaining composition in the container was measured. The results are summarized in Table 1 below.

[0095] composition

[0096] The results of this example indicate that these compositions are azeotrope-like compositions, since when 50% by weight of the initial composition is removed, the difference in vapor pressure of the remaining composition at 40°C from the vapor pressure of the initial composition is within about 10% or less. Also, in some cases, the pressure of a given composition is higher than the vapor pressure of any of the pure components in the compos...

Embodiment 2

[0097] Example 2: Distillation

[0098] A solution containing 30.0% by weight of HFC-43-10mee and 70.0% by weight of HFC-365mfc was prepared in a suitable container and mixed thoroughly. The solution was distilled on a five-stage Oldershaw distillation column (7 cm diameter, 40 cm high) using a reflux:draw ratio of 10:1. Top and bottom temperature readings are accurate to 1°C. Distillation was performed at a pressure of 760 mmHg. Distillate composition was determined by gas chromatography. The results are listed in Table 2.

[0099] distillate

[0100] Analysis of the above data shows only small differences in overhead temperature and distillate composition as the distillation proceeds, exhibiting azeotrope-like properties.

Embodiment 3

[0101] Example 3: Distillation

[0102] A solution containing 26.7% by weight of HFC-43-10mee, 44.7% by weight of HFC-365mfc and 28.6% by weight of tDCE was prepared in a suitable container and mixed thoroughly. The solution was distilled on a five-stage Oldershaw distillation column (7 cm diameter, 40 cm high) using a reflux:draw ratio of 10:1. Head and kettle temperature readings are accurate to 1°C. Distillation was performed at a pressure of 757.53 mmHg. Distillate composition was determined by gas chromatography. The results are listed in Table 3.

[0103] distillate

[0104] Analysis of the above data shows only small differences in overhead temperature and distillate composition as the distillation proceeds, exhibiting azeotrope-like properties.

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PUM

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Abstract

Disclosed are binary azeotrope-like compositions consisting essentially of 1,1,1,3,3-pentafluorobutane (HFC-365mfc) and 1,1,1,2,3,4,4,5,5,5-decafluoropentane (HFC-43-10mee) or nonafluoromethoxybutane. The present invention further includes ternary or quaternary azeotrope-like compositions consisting essentially of 1,1,1,3,3-pentafluorobutane and 1,1,1,2,3,4,4,5,5-decafluoropentane or nonafluoromethoxybutane, and additionally trans-1,2-dichloroethylene, n-propyl bromide, acetone, methanol, ethanol or isopropanol.

Description

[0001] This application is a branch of the invention patent application PCT / US00 / 07520 with the filing date of March 22, 2000, entitled "Azeotrope-like composition of 1,1,1,3,3-pentafluorobutane". case application, the Chinese patent application number of the original application is 00805179.8. technical field [0002] The present invention relates to a binary azeotrope-like composition (azeotrope-like composition), consisting essentially of 1,1,1,3,3-pentafluorobutane and 1,1,1,2,3,4,4, 5,5,5-Decafluoropentane or nonafluoromethoxybutane. The present invention also relates to ternary or quaternary azeotrope-like compositions consisting essentially of 1,1,1,3,3-pentafluorobutane and 1,1,1,2,3,4,4,5, 5,5-decafluoropentane or nonafluoromethoxybutane and at least one of trans-1,2-dichloroethylene, n-propyl bromide, acetone, methanol, ethanol or isopropanol. Background technique [0003] In recent years, it has been reported that certain halogenated hydrocarbon compounds used f...

Claims

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Application Information

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IPC IPC(8): C09K5/04C11D7/26C07C19/08C11D7/28C11D7/30C11D7/50C11D7/60C23G5/028
CPCC07C19/08C11D7/5054C11D7/5063C11D7/5077C11D7/5081C09K5/045C09K2205/122C09K2205/32C09K2205/40
Inventor B·H·米诺M·A·施维策T·L·塔特萨尔
Owner THE CHEMOURS CO FC LLC
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