Stable formulated systems with chloro-3,3,3-trifluoropropene

a technology of trifluoropropene and formulated systems, which is applied in the direction of lubricant composition, transportation and packaging, chemical apparatus and processes, etc., can solve the problems of short atmospheric lifetime, chemical instability of hfos and hcfos, and it is not practicable to incorporate these fluoroolefins into refrigeration or air-conditioning systems. to achieve the effect of effective us

Inactive Publication Date: 2013-05-16
ARKEMA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides stable compositions of HCFO-1233zd and / or HCFO-1233xf that do not require additional stabilizers. These compositions are suitable for use in refrigeration, heat transfer, and foam pre-mixes. The stability of these compositions is compared to other refrigerants and found to be at least as stable as R-141b and R-123, without the need for additional stabilizers. This is good news because it means that these stable compositions can be used without the need for costly and potentially toxic stabilizers.

Problems solved by technology

Because of the presence of alkene linkage it is expected that the HFOs and HCFOs will be chemically unstable, relative to HCFCs or CFCs.
The inherent chemical instability of these materials in the lower atmosphere results in short atmospheric lifetimes, which provide the low global warming potential and zero or near zero ozone depletion properties desired.
However, such inherent instability is believed to also impact the commercial application of such materials, which may degrade during storage, handling and use.
It is disclosed that because of the instability of the fluoroolefins, it may not be practical to incorporate these fluoroolefins into refrigeration or air-conditioning systems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020]The compatibility and stability of trans-HCFO-1233zd in the presence of lubricating oils and metals was tested at elevated temperatures in stainless steel autoclaves following the procedure described previously. The lubricants tested in three separate autoclaves were AB-150, MO-150, and POE-22. In a fourth autoclave, trans-HCFO-1233zd was tested without lubricant, moisture, or the metal chips to be used as a reference sample. The original HCFO-1233zd contained from 1 to 2% impurities, primarily HFO-1234ze and HFC-245fa, which were subtracted out of the GC scans as described previously.

[0021]Table 1 shows the purity of the samples following the stability tests. The purity of the HCFO-1233zd remained greater than 99% in all cases. The primary impurities in the samples containing oil were dimethyl terephthalate and diethylphthalate which were not decomposition products of the HCFO-1233zd.

example 7

[0025]A sample of HCFO-1233zd, containing trans- and cis-isomers in a ratio of approximately 7:3, was stored in a clear glass vial for over ten years in uncontrolled ambient conditions. Following the storage period the sample was visually observed and tested by GC analysis. The sample still looked clear and unchanged and GC analysis showed no significant change in sample composition. This example shows that HCFO1233zd is stable during extended storage conditions.

example 9

and comparative example 10 show that trans-HCFO-1233zd was more stable than the analogous hydrofluoroolefin trans-HFO-1234ze.

[0032]These examples show that chloro-3,3,3-trifluoropropenes, particularly HCFO-1233zd, are unexpectedly stable during both storage and use and at least as stable as prior HCFCs and CFCs, especially in combination with lubricants, moisture, active metals, polyol B-side formulations and mixtures thereof.

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PUM

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Abstract

The present invention relates to formulated refrigerant systems of 1-chloro-3,3,3-trifluoropropene (R-1233zd) that are sufficiently thermally and chemically stable such that they can be effectively used sans additional stabilizers. The formulations of the present invention are particularly useful compositions for refrigeration, heat transfer.

Description

[0001]This application is a continuation application of U.S. application for patent Ser. No. 12 / 667,121 filed Dec, 29, 2009 which claims priority to International application for patent Serial Number PCT / US20091036267 filed Mar. 6, 2009 which designated the United States, which claimed priority to U.S. provisional application for patent Ser. No. 61 / 034,513 filed Mar. 7, 2008.FIELD OF THE INVENTION[0002]The present invention relates to formulated systems of 1-chloro-3,3,3-trifluoropropene (R-1233zd) and / or 2-chloro-3,3,3-trifluoropropene (R-1233xf) that are sufficiently thermally and chemically stable such that they can be effectively used without the need for additional stabilizers, The formulations of the present invention are particularly useful compositions for refrigeration, heat transfer, and foam pre-mixes.BACKGROUND OF THE INVENTION [0003]With continued regulatory pressure there is a growing need to identify more environmentally sustainable replacements for refrigerants, heat...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): C09K5/00C09K23/00
CPCC09K5/044C09K5/00C10M171/008C10M2203/065B01F17/0085C10M2207/2835C10M2209/043C10M2209/1033C10N2220/302C10M2205/0285C09K5/04C10N2020/101C09K23/017
InventorVAN HORN, BRETT L.ELSHEIKH, MAHER Y.CHEN, BENJAMIN BINBONNET, PHILIPPE
OwnerARKEMA INC