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Heat transfer systems using mixtures of polyols and ionic liquids

A technology of ionic liquids and polyols, applied in refrigeration and liquefaction, heat exchange materials, lighting and heating equipment, etc., can solve problems such as high viscosity and reduced possibility

Inactive Publication Date: 2013-04-17
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one disadvantage of ionic liquids is that most of them have a high viscosity, which reduces the possibility of using them as thermal energy transfer fluids

Method used

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  • Heat transfer systems using mixtures of polyols and ionic liquids
  • Heat transfer systems using mixtures of polyols and ionic liquids
  • Heat transfer systems using mixtures of polyols and ionic liquids

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0204] Absorption Cycle Theoretical Performance

[0205] Table 1: Comparison of theoretical cycle performance (a)

[0206] PDO; 1,3-propanediol

[0207] Binary system (1) /

[0208] (a) Cycle condition: T g / T con / T a / T eva = 100 / 40 / 30 / 10°C, and m r =1kg·s -1 .

Embodiment 2

[0210] 1-Butyl-3-methylimidazole Onium Mixture of hexafluorophosphate and 1,3-propanediol

[0211] 1,3-propanediol in 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF 6 ]) are summarized in Table 2.

[0212] Table 2 : 1,3-propanediol (1)+[bmim][PF 6 ](2) system

[0213] T / K

[0214] 291.9±0.2

Embodiment 3

[0216] 1-Butyl-3-methylimidazole Onium Mixture of Tetrafluoroborate and 1,3-Propanediol

[0217] 1,3-propanediol in 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF 4 ]) are summarized in Table 3.

[0218] table 3 : 1,3-propanediol (1)+[bmim][BF 4 ](2) system

[0219] T / K

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Abstract

A thermal energy transfer system utilizes a composition containing one or more polyols, such as 1,3-propanediol, and one or more ionic liquids as a thermal energy transfer composition. There is also provided a method of transferring thermal energy and a process for temperature adjustment, either cooling or heating, using such a composition.

Description

[0001] This patent application claims priority to US Provisional Application 60 / 921,585, filed April 3, 2007, which is hereby incorporated by reference in its entirety in its entirety for all purposes. technical field [0002] The present invention relates to thermal energy transfer systems in which mixtures comprising ionic liquids can be used as thermal energy transfer compositions. Background of the invention [0003] As a new class of solvents with immeasurable vapor pressures, room temperature ionic liquids are being investigated for various applications such as chemical separations and as unique reaction media. Several methods using ionic liquids have been commercialized, such as BASIL from BASF (Ludwigshafen, Germany) TM Acid removal technology. [0004] Thermal properties such as heat capacity, thermal conductivity, density, thermal stability, vapor pressure, and melting point have been determined for several ionic liquids (see, e.g., "Thermochemistry of Ionic Liqui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/04
CPCF25B15/02Y02B30/62F25B2315/002C09K5/047Y02P20/10Y02A30/27
Inventor A·尤科泽基M·B·什夫莱特
Owner EI DU PONT DE NEMOURS & CO