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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 contaminants such as hydrocarbons or silicone oils and solder fluid residues

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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