Patent US5156768A successfully refreshed from Google Patents.
US5156768A
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Stabilized chlorine-containing refrigeration compositions
Assignee: Honeywell International Inc
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Filing: 1991-04-05
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Granted: 1992-10-20
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Expires: 2011-04-05
Abstract
Abstract R12, which contains chlorine, and hydrogen-contributing lubricants react to form acids such as hydrogen chloride and hydrogen fluoride and simultaneously, R12 is converted to R22. Such reactions are undesirable because the acids which form destroy the metallic components of a refrigeration system and cause the breakdown of the lubricants. The present invention provides a compositions for use in compression refrigeration and air-conditioning which substantially reduce the occurrence of the foregoing problem. The compositions comprise: (a) chlorine-containing refrigerant selected from the group consisting of hydrochlorocarbons, (b) hydrogen-contributing lubricant; and (c) composition comprising: (1) at least one phenol and (2) at least one aromatic epoxide or fluorinated alkyl epoxide wherein the composition (c) substantially reduces the removal of chlorine or chlorine and fluorine from the chlorine-containing refrigerant (a) and replacement of the halogen with hydrogen from the hydrogen-contributing lubricant (b).
Inventors
- 👤 Raymond H. P. Thomas
- 👤 Ruth H. Chen
- 👤 Kenneth Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:07
CPC Classifications
C; C10; C10M; C10M141/00; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C10M129/00; C10M129/02; C10M129/04; C10M129/10; C10M129/14; C10M129/16; C10M129/18; C10M131/00; C10M131/08; C10M131/10; C10M133/00; C10M133/02; C10M133/04; C10M133/12; C10M133/14; C10M135/00; C10M135/20; C10M135/28; C10M135/30; C10M171/00; C10M171/008; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/027; C10M2207/04; C10M2207/042; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/04; C10M2211/042; C10M2211/06; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/062; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084; C10M2219/087; C10M2219/088; C10M2219/089; C10N; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
26 words
A stabilizing composition comprising: (i) phenol and (ii) fluorinated epoxide wherein the ratio of said phenol to said fluorinated epoxide is about 1:99 to about 99:1.
Claim 2
Dependent Claim
26 words
A stabilizing composition comprising: (i) phenol and (ii) fluorinated epoxide wherein the ratio of said phenol to said fluorinated epoxide is about 1:99 to about 99:1.
Claim 3
Dependent Claim
43 words
The stabilizing composition of claim 1 wherein said phenol is phenol selected from the group consisting of: 4,4'-methylenebis(2,6-di-tert-butylphenol); 4,4'-bis(2,6-di-tert-butylphenol); 4,4'-bis(2-methyl-6-tert-butylphenol); 2,2'-methylenebis(4-ethyl-6-tert-butylphenol); 2,2'-methylenebis(4-methyl-6-tert-butylphenol); 4,4'-butylidenebis(3-methyl-6-tert-butylphenol); 4,4'-isopropylidenebis(2,6-di-tert-butylphenol); 2,2'-methylenebis(4-methyl-6-nonylphenol); 2,2'-isobutylidenebis(4,6-dimethylphenol); 2,2'-methylenebis(4-methyl-6-cyclohexylphenol); 2,6-di-tert-4-methylphenol; 2,6-di-tert-4-ethylphenol; 2,4-dimethyl-6-tert-butylphenol; 2,6-di-tert-α-dimethylamino-p-cresol; 2,6-di-tert-butyl-4(N,N'-dimethylaminomethylphenol); 4,4'-thiobis(2-methyl-6-tert-butylphenol); 4,4'-thiobis(3-methyl-6-tert-butylphenol); 2,2'-thiobis(4-methyl-6-tert-butylphenol); bis(3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis(3,5-di-tert-4-hydroxybenzyl)sulfide; hydroquinone; t-butylhydroquinone; and mixtures thereof.
Claim 4
Dependent Claim
20 words
The stabilizing composition of claim 1 wherein said phenol is phenol selected from the group consisting of hydroquinone and 2,6-di-tert-4-methylphenol.
Claim 5
Dependent Claim
12 words
The stabilizing composition of claim 1 wherein said phenol is butylated hydroxytoluene.
Claim 6
Dependent Claim
11 words
The stabilizing composition of claim 1 wherein said phenol is hydroquinone.
Claim 7
Dependent Claim
14 words
The stabilizing composition of claim 1 wherein said fluorinated epoxide is fluorinated aromatic epoxide.
Claim 8
Dependent Claim
13 words
The stabilizing composition of claim 6 wherein said fluorinated aromatic epoxide is 2,2'[[[5-heptadecafluorooctyl]1,3phenylene]bis-[[2,2,2trifluoromethyl]ethylidene]oxymethylene]bisoxirane.
Claim 9
Dependent Claim
14 words
The stabilizing composition of claim 1 wherein said fluorinated epoxide is fluorinated alkyl epoxide.
Claim 10
Dependent Claim
25 words
The stabilizing composition of claim 8 wherein said fluorinated alkyl epoxide is of the formula ##STR3## wherein R f is fluorinated or perfluorinated alkyl group.
Claim 11
Dependent Claim
18 words
The stabilizing composition of claim 1 wherein said phenol is butylated hydroxytoluene and said fluorinated epoxide is 2,2'[[[5-heptadecafluorooctyl]1,3phenylene]bis-[[2,2,2trifluoromethyl]ethylidene]oxymethylene]bisoxirane.
Claim 12
Dependent Claim
17 words
The stabilizing composition of claim 1 wherein said phenol is hydroquinone and said fluorinated epoxide is 2,2'[[[5-heptadecafluorooctyl]1,3phenylene]bis-[[2,2,2trifluoromethyl]ethylidene]oxymethylene]bisoxirane.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-20 | 1996-04-20 | 1996-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-20 | 2000-04-20 | 2000-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-20 | 2004-04-20 | 2004-10-20 | $7700.00 | Window Closed / Lapsed |