Patent US1312754A successfully refreshed from Google Patents.
US4072027A
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Stabilized heat activated heat exchange absorption pair
Assignee: Honeywell International Inc
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Filing: 1977-01-19
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Granted: 1978-02-07
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Expires: 1997-01-19
Abstract
Abstract A stabilized heat exchange medium is disclosed including a fluorocarbon, an absorbant and a tribasic phosphite stabilizer. The preferred absorbants are assymetrical furan derivatives containing at least 1 oxygen with a single bond to an adjacent carbon, and is most preferably an alkyl tetrahydrofurfuryl ether. The fluorocarbon contains 1 or 2 carbons, 1 or 2 hydrogens and the remainder chlorine and fluorine. The tribasic phosphites are of the formula (R1'O)(R2'O)(R3'O)P, wherein R1', R2' and R3' are each independently alkyl, alkenyl, phenyl, alkylene phenyl, alkylene alkylphenyl or alkylphenyl.
Inventors
- 👤 Morris B. Berenbaum
- 👤 Francis E. Evans
- 👤 Richard E. Eibeck
- 👤 Martin A. Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:11
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/047; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
266 words
A stabilized absorption composition comprising a. a fluorocarbon as refrigerant selected from the group consisting of monochlorodifluoromethane, dichloromonofluoromethane, trifluoromethane, monochloromonofluoromethane, dichlorotrifluoroethane, monochlorotetrafluoroethane, monochlorotrifluoroethane and mixtures thereof; b. an asymetrical furan derivative as absorbent of the formula: ##STR6## where R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are each independently H, alkyl having 1-5 carbons, alkoxy having 1-5 carbons, phenyl, alkylene phenyl having 7-11 carbons, hydroxy alkyl having 1-5 carbons, alkoxy alkyl having 2-6 carbons, alkyl carboxylate having 2-6 carbons, fluorine or chlorine, provided that at least one of R 1 , R 2 , R 3 , R 4 , R 5 and R 6 has an oxygen atom which has a single bond to a carbon atom; or of the formula ##STR7## where R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 and R 14 are each independently as defined above for R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 , provided at least one of R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 and R 14 has an oxygen atom which has a single bond to a carbon atom; and an effective amount of a stabilizer of the formula (R 1 'O) (R 2 'O) (R 3 'O) P wherein R 1 ', R 2 ' and R 3 ' are each independently alkyl, alkenyl, phenyl, alkylene phenyl, alkylene alkylphenyl, or alkylphenyl.
Claim 2
Dependent Claim
266 words
A stabilized absorption composition comprising a. a fluorocarbon as refrigerant selected from the group consisting of monochlorodifluoromethane, dichloromonofluoromethane, trifluoromethane, monochloromonofluoromethane, dichlorotrifluoroethane, monochlorotetrafluoroethane, monochlorotrifluoroethane and mixtures thereof; b. an asymetrical furan derivative as absorbent of the formula: ##STR6## where R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are each independently H, alkyl having 1-5 carbons, alkoxy having 1-5 carbons, phenyl, alkylene phenyl having 7-11 carbons, hydroxy alkyl having 1-5 carbons, alkoxy alkyl having 2-6 carbons, alkyl carboxylate having 2-6 carbons, fluorine or chlorine, provided that at least one of R 1 , R 2 , R 3 , R 4 , R 5 and R 6 has an oxygen atom which has a single bond to a carbon atom; or of the formula ##STR7## where R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 and R 14 are each independently as defined above for R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 , provided at least one of R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 and R 14 has an oxygen atom which has a single bond to a carbon atom; and an effective amount of a stabilizer of the formula (R 1 'O) (R 2 'O) (R 3 'O) P wherein R 1 ', R 2 ' and R 3 ' are each independently alkyl, alkenyl, phenyl, alkylene phenyl, alkylene alkylphenyl, or alkylphenyl.
Claim 3
Dependent Claim
23 words
A stabilized composition according to claim 1 and comprising about 4% to about 6% of said fluorocarbon by weight of said furan derivative.
Claim 4
Dependent Claim
22 words
A stabilized composition according to claim 2 having about 0.05% to about 3.0% of said stabilizer by weight of said furan derivative.
Claim 5
Dependent Claim
22 words
A stabilized composition according to claim 3 having about 0.05% to about 1.0% of said stabilizer by weight of said furan derivative.
Claim 6
Dependent Claim
12 words
A stabilized composition according to claim 1 wherein said fluorocarbon is dichloromonofluoromethane.
Claim 7
Dependent Claim
24 words
A stabilized composition according to claim 1 wherein asymmetrical furan derivative is of the formula ##STR8## where R 15 is alkyl having 1-5 carbons.
Claim 8
Dependent Claim
16 words
A stabilized composition as claimed in claim 6 wherein R 15 is alkyl having 2-4 carbons.
Claim 9
Dependent Claim
15 words
A stabilized composition according to claim 7 wherein said furan derivative is ethyl tetrahydrofurfuryl ether.
Claim 10
Dependent Claim
15 words
A stabilized composition according to claim 7 wherein said furan derivative is t-butyl tetrahydrofurfuryl ether.
Claim 11
Dependent Claim
22 words
A stabilized composition according to claim 1 wherein R 1 ', R 2 ' and R 3 ' each have 1-20 carbons.
Claim 12
Dependent Claim
22 words
A stabilized composition according to claim 10 wherein R 1 ', R 2 ' and R 3 ' each have 6-14 carbons.
Claim 13
Dependent Claim
43 words
A stabililized composition according to claim 11 wherein said stabilizer R 1 ', R 2 ' and R 3 ' are each independently alkyl having 6-14 carbons, phenyl, alkylphenyl having 7-14 carbons, alkylene phenyl having 7-14 carbons or alkylene alkylphenyl having 8-14 carbons.
Claim 14
Dependent Claim
26 words
A stabilized composition according to claim 12 wherein said stabilizer R 1 ', R 2 ' and R 3 ' are each independently isodecyl or phenyl.
Claim 15
Dependent Claim
13 words
A stabilized composition according to claim 13 wherein the stabilizer is triisodecyl phosphite.
Claim 16
Dependent Claim
106 words
A method of absorption heating which comprises a. releasing heat of solution in the vicinity of an area to be heated by absorbing a fluorocarbon in an asymmetrical furan derivative containing a stabilizer to form the composition of claim 1, heating the resultant solution to release said fluorocarbon from said furan derivative, condensing released fluorocarbon in the vicinity of the area to be heated to form liquid fluorocarbon, evaporating the liquid fluorocarbon at a location removed from the vicinity of the area to be heated and returning the evaporated fluorocarbon to the vicinity of the area to be heated for reabsorption into said solvent furan derivative.
Claim 17
Dependent Claim
16 words
The method of claim 15 wherein the furan derivative and stabilizer remain liquid throughout said method.
Claim 18
Dependent Claim
10 words
The method of claim 15 wherein the fluorocarbon is dichloromonofluoromethane.
Claim 19
Dependent Claim
19 words
The method of claim 15 wherein the furan derivative is an alkyl tetrahydrofurfuryl ether, said alkyl having 1-5 carbons.
Claim 20
Dependent Claim
14 words
The method of claim 18 wherein the furan derivative said alkyl has 2-4 carbons.
Claim 21
Dependent Claim
13 words
The method of claim 19 wherein the furan derivative is ethyl tetrahydrofurfuryl ether.
Claim 22
Dependent Claim
13 words
The method of claim 19 wherein the furan derivative is t-butyl tetrahydrofurfuryl ether.
Claim 23
Dependent Claim
22 words
The method of claim 19 wherein the stabilizer R 1 ', R 2 ' and R 3 ' each have 1-20 carbons.
Claim 24
Dependent Claim
22 words
The method of claim 15 wherein the solution is heated to from about 250° to about 450° F to release the fluorocarbon.
Claim 25
Dependent Claim
20 words
The method of claim 15 wherein said absorption takes place at a temperature from about 90° to about 130° F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |