CA2047800A1 - Fire extinguishing methods utilizing 1-chloro-1,1,2,2-tetrafluoroethane - Google Patents
Fire extinguishing methods utilizing 1-chloro-1,1,2,2-tetrafluoroethaneInfo
- Publication number
- CA2047800A1 CA2047800A1 CA002047800A CA2047800A CA2047800A1 CA 2047800 A1 CA2047800 A1 CA 2047800A1 CA 002047800 A CA002047800 A CA 002047800A CA 2047800 A CA2047800 A CA 2047800A CA 2047800 A1 CA2047800 A1 CA 2047800A1
- Authority
- CA
- Canada
- Prior art keywords
- fire
- chloro
- tetrafluoroethane
- extinguishing
- fire extinguishing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- JQZFYIGAYWLRCC-UHFFFAOYSA-N 1-chloro-1,1,2,2-tetrafluoroethane Chemical compound FC(F)C(F)(F)Cl JQZFYIGAYWLRCC-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims description 18
- 150000001875 compounds Chemical class 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 13
- RJCQBQGAPKAMLL-UHFFFAOYSA-N bromotrifluoromethane Chemical compound FC(F)(F)Br RJCQBQGAPKAMLL-UHFFFAOYSA-N 0.000 claims description 11
- 239000003380 propellant Substances 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 4
- MEUAVGJWGDPTLF-UHFFFAOYSA-N 4-(5-benzenesulfonylamino-1-methyl-1h-benzoimidazol-2-ylmethyl)-benzamidine Chemical compound N=1C2=CC(NS(=O)(=O)C=3C=CC=CC=3)=CC=C2N(C)C=1CC1=CC=C(C(N)=N)C=C1 MEUAVGJWGDPTLF-UHFFFAOYSA-N 0.000 claims 2
- -1 CF2BrC1 Chemical compound 0.000 claims 2
- 229910052786 argon Inorganic materials 0.000 claims 2
- 229910002092 carbon dioxide Inorganic materials 0.000 claims 2
- 229910052757 nitrogen Inorganic materials 0.000 claims 2
- YFMFNYKEUDLDTL-UHFFFAOYSA-N 1,1,1,2,3,3,3-heptafluoropropane Chemical compound FC(F)(F)C(F)C(F)(F)F YFMFNYKEUDLDTL-UHFFFAOYSA-N 0.000 claims 1
- XPDWGBQVDMORPB-UHFFFAOYSA-N Fluoroform Chemical compound FC(F)F XPDWGBQVDMORPB-UHFFFAOYSA-N 0.000 claims 1
- KVBKAPANDHPRDG-UHFFFAOYSA-N dibromotetrafluoroethane Chemical compound FC(F)(Br)C(F)(F)Br KVBKAPANDHPRDG-UHFFFAOYSA-N 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 description 19
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 8
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 8
- 229910052794 bromium Inorganic materials 0.000 description 8
- 239000000460 chlorine Substances 0.000 description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 7
- MEXUFEQDCXZEON-UHFFFAOYSA-N bromochlorodifluoromethane Chemical compound FC(F)(Cl)Br MEXUFEQDCXZEON-UHFFFAOYSA-N 0.000 description 7
- 229910052801 chlorine Inorganic materials 0.000 description 7
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 6
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- RFCAUADVODFSLZ-UHFFFAOYSA-N 1-Chloro-1,1,2,2,2-pentafluoroethane Chemical compound FC(F)(F)C(F)(F)Cl RFCAUADVODFSLZ-UHFFFAOYSA-N 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 239000011630 iodine Substances 0.000 description 2
- JLGADZLAECENGR-UHFFFAOYSA-N 1,1-dibromo-1,2,2,2-tetrafluoroethane Chemical compound FC(F)(F)C(F)(Br)Br JLGADZLAECENGR-UHFFFAOYSA-N 0.000 description 1
- 239000004340 Chloropentafluoroethane Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 235000019406 chloropentafluoroethane Nutrition 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 125000001475 halogen functional group Chemical group 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 239000005436 troposphere Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0028—Liquid extinguishing substances
- A62D1/0057—Polyhaloalkanes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing Compositions (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
ABSTRACT
1-Chloro-1,1,2,2-tetrafluoroethane is a non-ozone-depleting fire extinguishing agent used alone or in blends with other compounds in total flooding and portable systems.
1-Chloro-1,1,2,2-tetrafluoroethane is a non-ozone-depleting fire extinguishing agent used alone or in blends with other compounds in total flooding and portable systems.
Description
20~7~
BACKG~OUND OF T~E INVENTION
Field of the Invention. This invention relates to fire extirlguishing methods utiliziny l-Chloro-1,1,2,2-tetrafluoroethane, HCF2CF2Cl.
Descri~tion of the Prio{ Art. The use of certain bromine, chlorine and iodine-containing halogenated chemical agents for the extinguishment of fires is common.
These agents are in general thought to be effective due to their interference with the normal chain reactions responsible for flame propagation. It is taught in the art that the effectiveness of the halogens is in the order I > Br > Cl > F, for example, C.L. Ford, in Halo~enated Fire u~ressants, R.G. Gann, ed., ~CS Symposium Series 16.
The use of iodine-containing compounds as fire extinguishing agents has been avoided primarily due to the expense of their manufacture or due to toxicity considerations. The three fire extinguishing agents presently in common use are all bromine-containing compounds, bromotrifluoromethane (CF3Br), bromochlorodifluoromethane (CF2~rCl), and dibromotetrafluoroethane (BrCF2CF2~r). It has generally been taught that to be effective as a fire extinguishing agent, a molecule would have to contain bromine, although certain chlorine-containing compounds have been proposed as extinguishing agents, for example chloropentafluoroethane (CF:3CF2Cl) as described in US Patent 3,~44,354 to Larsen.
~ lthough the above name~ bromine or chlorine-containing agents are effective in extinc~uishing fires, totally halogenated agents such as CF3Br, CF2BrCl and CF3CF2Cl , ..
- ` ~
.
BACKG~OUND OF T~E INVENTION
Field of the Invention. This invention relates to fire extirlguishing methods utiliziny l-Chloro-1,1,2,2-tetrafluoroethane, HCF2CF2Cl.
Descri~tion of the Prio{ Art. The use of certain bromine, chlorine and iodine-containing halogenated chemical agents for the extinguishment of fires is common.
These agents are in general thought to be effective due to their interference with the normal chain reactions responsible for flame propagation. It is taught in the art that the effectiveness of the halogens is in the order I > Br > Cl > F, for example, C.L. Ford, in Halo~enated Fire u~ressants, R.G. Gann, ed., ~CS Symposium Series 16.
The use of iodine-containing compounds as fire extinguishing agents has been avoided primarily due to the expense of their manufacture or due to toxicity considerations. The three fire extinguishing agents presently in common use are all bromine-containing compounds, bromotrifluoromethane (CF3Br), bromochlorodifluoromethane (CF2~rCl), and dibromotetrafluoroethane (BrCF2CF2~r). It has generally been taught that to be effective as a fire extinguishing agent, a molecule would have to contain bromine, although certain chlorine-containing compounds have been proposed as extinguishing agents, for example chloropentafluoroethane (CF:3CF2Cl) as described in US Patent 3,~44,354 to Larsen.
~ lthough the above name~ bromine or chlorine-containing agents are effective in extinc~uishing fires, totally halogenated agents such as CF3Br, CF2BrCl and CF3CF2Cl , ..
- ` ~
.
2 Q ~'7 ~
containing bromine or chlorine are asserted by some to be capable of the destruction of the earth's protective ozone layer.
It is therefore an object of this invention to provide a 5 method for extinguishing fires that e~tinguishes fires as rapidly and effectively as the present employed agents, and is environmentally safe with respect to ozone depletion.
2Q~78~0 SUMMARY OF THE INVENTION
The foregoing and other objects, advantages and features of the present invention may be achieved by employing l-chloro-1,1,2,2-tetrafluoroethane (HCF2CF2Cl) and blends thereof with other compounds as fire extinguishants for use in fire extinguishing methods and apparatus. More particularly, the method of this invention involves introducing to a fire l-chloro-1,1,2,2-tetrafluoroethane in a fire extinguishing concentration and maintaining such concentration until the fire is extinguished.
l-Chloro-1,1,2,2-tetxafluoroethane may be used alone or in admixture with other compounds, optionally in the presence of a propellant. Generally l-chloro-1,1,2,2-tetra-fluoroethane or its mixtures with other compounds are employed in the range of about 2 to 15%, preferably 4 to 10%, on a v/v basis.
.
,' ~ ' . ,-'~
20478~
~4--~ESCRIPTION OF T~E PREFERRED EMBODIMENTS
In acc~rdance with the present invention,l-chloro-1,1,2,2-tetrafluoroethane has been found to be an effective fire extinguishing agent at concentrations safe for use. However, because l-chloro-1,1,2,2-tetrafluoroethane contains a hydrogen atom, it has a very low ozone depletion potential due to its removal in the troposphere via reaction with hydro~yl radicals. For example, employing the method of Ba~son for the estimation of ozone depletion (ODP) values, 1-chloro-1,1,2,2-tetrafluoroethane has an ODP of 0.03, compared to ODP values of 19.26 and 2.65 for the presently employed agents CF3Br and CF2BrCl, respectively, a reduction in ODP of greater than 99% in each case.
l-Chloro-1,1,2,2-tetrafluoroethane has an LC50 value (con-centration necessary to cause death in half of test subjects)of 21~ v/v as reported in Simons, ~_uorine Chemist~y, volume 3, and is hence effective at concentrations well below levels harmful to living things.
l-Chloro-1,1,2,2-tetrafluoroethane may be used alone or in admixture with other compounds, optionally in the presence of a propellant. Among the compounds with which l-chloro-1,1,2,2-tetrafluoroethane may be blended are chlorine and/or bromine containing compounds such as CF3Br, CF2BrCl, CF3CF2Cl, and BrCF2CF2Ur. Other compounds forming 25 useful blends with 1-chloro-1,1,2,2-tetrafluoroethane include CFZHBr, CF3CIIFBr, CF3CF2l~, CF3CIIFCF3, CF3C~FCl, CF3CHC12, CF4, CF3~, and similar fluorocarbons. The materials of this invention may also be used in the presence of a propellant, such as N2, C02 or Ar.
Where l-chloro-1,1,2,2-tetrafluoroethane is employed in blends, it is desirably at a level of at least about 5 percent by weight of the blend. l-Chloro-1,1,2,2-tetrafluoroethane is preferably employed at high enough levels in such blends so as to minimize the adverse 20~7~0~
environmental effects of chlorine and bromine containing compounds.
l-Chloro-1,1,2,2-tetrafluoroethane may be effectively employed at substantially any minimum concentration at which the fire may be e~tinguished, the exact minimum level being dependent on the particular combustible material, and the combustion conditions. In general, best results are achieved where l-chloro-1,1,2,2-tetrafluoroethane or mixtures and blends are employed at a level of about 4% (v/v). Likewise the maximum amount to be employed will be governed by matters o~ economics and potential to~icity to living things. About 15~ provides a convenient maximum for use of 1-chloro-1,1,2,2-tetrafluoroethane and its mixtures thereof in occupied areas. Concentrations above 15% may be employed in non-occupied areas, with the e~act level determined by the particular combustible material and the conditions of combustion.
l-Chloro-1,1,2,2-tetrafluoroethane may be applied using conventional application techniques and methods used for agents such as CF3Br and CF2BrCl. Thus, the agents may be used in total flooding systems, portable systems or specialized systems. Thus, as is known to those skilled in the art, l-chloro-1,1,2,2-tetra~luoroethane may be pressurized with nitrogell or other inert gas at up to about 600 psig at ambient condition5 Practice of the present invention is illustrated by the following e~amples, which are presented for purposes of illustration but not of limitatiorl.
2~7~0 Concentrations of agent required to extinguish diffusion flames of n-heptane were determined using the cup burner method. Agent vapor was mixed with air and introduced to the flame, with the agent concentration being slowly increased until the flow was just sufficient to cause extinction of the flame. The data are reported in Table 1, which demonstrate the effectiveness HCF2CF2Cl. Values for CF3Br and CF2BrCl are included for reference purposes.
Table 1:
Extinguishment of n-heptane Diffusion Flames _______________________________________________________________ ~gent Air flow ~gent Required Extinguishing Conc.
cc/min cc/min % v/v mg/L
_______________________________________________________________ HCF2CF2C1 16,200 1290 7.4 411 CF2BrC1 16,200 546 3.3 222 CF3Br 16,200 510 3.1 189 _______________________________________________________________ ~ ,L~E_2 The procedure o~ example 1 was repeated employing n-~utane as fuel. ~esults are sllown in Table 2, and 20 demonstrate tlle eicacy o IICF2CF2Cl for extinguishment of fires.
20478~0 Table 2 Extinguishment of n-Butane Diffusion Flames _______________________________________________________________ Agent Air flow Agent required Extinguishing Conc.
cc/min cc/min % v/v mg/L
_______________________________________________________________ HCF2CF2C1 16,200 1158 6.7 372 CF2BrC1 16,200 420 2.5 168 CF3Br 16,200 396 2.4 146 _______________________________________________________________ While the bromine or chlorine containing agents CF3Br and CF2BrCl are somewhat more effective than HCF2CF2Cl, the use oE HCF2CF2Cl in accordance with this invention remains highly effective and its use avoids the significant environmental handicaps encountered with totally halogenated agents.
containing bromine or chlorine are asserted by some to be capable of the destruction of the earth's protective ozone layer.
It is therefore an object of this invention to provide a 5 method for extinguishing fires that e~tinguishes fires as rapidly and effectively as the present employed agents, and is environmentally safe with respect to ozone depletion.
2Q~78~0 SUMMARY OF THE INVENTION
The foregoing and other objects, advantages and features of the present invention may be achieved by employing l-chloro-1,1,2,2-tetrafluoroethane (HCF2CF2Cl) and blends thereof with other compounds as fire extinguishants for use in fire extinguishing methods and apparatus. More particularly, the method of this invention involves introducing to a fire l-chloro-1,1,2,2-tetrafluoroethane in a fire extinguishing concentration and maintaining such concentration until the fire is extinguished.
l-Chloro-1,1,2,2-tetxafluoroethane may be used alone or in admixture with other compounds, optionally in the presence of a propellant. Generally l-chloro-1,1,2,2-tetra-fluoroethane or its mixtures with other compounds are employed in the range of about 2 to 15%, preferably 4 to 10%, on a v/v basis.
.
,' ~ ' . ,-'~
20478~
~4--~ESCRIPTION OF T~E PREFERRED EMBODIMENTS
In acc~rdance with the present invention,l-chloro-1,1,2,2-tetrafluoroethane has been found to be an effective fire extinguishing agent at concentrations safe for use. However, because l-chloro-1,1,2,2-tetrafluoroethane contains a hydrogen atom, it has a very low ozone depletion potential due to its removal in the troposphere via reaction with hydro~yl radicals. For example, employing the method of Ba~son for the estimation of ozone depletion (ODP) values, 1-chloro-1,1,2,2-tetrafluoroethane has an ODP of 0.03, compared to ODP values of 19.26 and 2.65 for the presently employed agents CF3Br and CF2BrCl, respectively, a reduction in ODP of greater than 99% in each case.
l-Chloro-1,1,2,2-tetrafluoroethane has an LC50 value (con-centration necessary to cause death in half of test subjects)of 21~ v/v as reported in Simons, ~_uorine Chemist~y, volume 3, and is hence effective at concentrations well below levels harmful to living things.
l-Chloro-1,1,2,2-tetrafluoroethane may be used alone or in admixture with other compounds, optionally in the presence of a propellant. Among the compounds with which l-chloro-1,1,2,2-tetrafluoroethane may be blended are chlorine and/or bromine containing compounds such as CF3Br, CF2BrCl, CF3CF2Cl, and BrCF2CF2Ur. Other compounds forming 25 useful blends with 1-chloro-1,1,2,2-tetrafluoroethane include CFZHBr, CF3CIIFBr, CF3CF2l~, CF3CIIFCF3, CF3C~FCl, CF3CHC12, CF4, CF3~, and similar fluorocarbons. The materials of this invention may also be used in the presence of a propellant, such as N2, C02 or Ar.
Where l-chloro-1,1,2,2-tetrafluoroethane is employed in blends, it is desirably at a level of at least about 5 percent by weight of the blend. l-Chloro-1,1,2,2-tetrafluoroethane is preferably employed at high enough levels in such blends so as to minimize the adverse 20~7~0~
environmental effects of chlorine and bromine containing compounds.
l-Chloro-1,1,2,2-tetrafluoroethane may be effectively employed at substantially any minimum concentration at which the fire may be e~tinguished, the exact minimum level being dependent on the particular combustible material, and the combustion conditions. In general, best results are achieved where l-chloro-1,1,2,2-tetrafluoroethane or mixtures and blends are employed at a level of about 4% (v/v). Likewise the maximum amount to be employed will be governed by matters o~ economics and potential to~icity to living things. About 15~ provides a convenient maximum for use of 1-chloro-1,1,2,2-tetrafluoroethane and its mixtures thereof in occupied areas. Concentrations above 15% may be employed in non-occupied areas, with the e~act level determined by the particular combustible material and the conditions of combustion.
l-Chloro-1,1,2,2-tetrafluoroethane may be applied using conventional application techniques and methods used for agents such as CF3Br and CF2BrCl. Thus, the agents may be used in total flooding systems, portable systems or specialized systems. Thus, as is known to those skilled in the art, l-chloro-1,1,2,2-tetra~luoroethane may be pressurized with nitrogell or other inert gas at up to about 600 psig at ambient condition5 Practice of the present invention is illustrated by the following e~amples, which are presented for purposes of illustration but not of limitatiorl.
2~7~0 Concentrations of agent required to extinguish diffusion flames of n-heptane were determined using the cup burner method. Agent vapor was mixed with air and introduced to the flame, with the agent concentration being slowly increased until the flow was just sufficient to cause extinction of the flame. The data are reported in Table 1, which demonstrate the effectiveness HCF2CF2Cl. Values for CF3Br and CF2BrCl are included for reference purposes.
Table 1:
Extinguishment of n-heptane Diffusion Flames _______________________________________________________________ ~gent Air flow ~gent Required Extinguishing Conc.
cc/min cc/min % v/v mg/L
_______________________________________________________________ HCF2CF2C1 16,200 1290 7.4 411 CF2BrC1 16,200 546 3.3 222 CF3Br 16,200 510 3.1 189 _______________________________________________________________ ~ ,L~E_2 The procedure o~ example 1 was repeated employing n-~utane as fuel. ~esults are sllown in Table 2, and 20 demonstrate tlle eicacy o IICF2CF2Cl for extinguishment of fires.
20478~0 Table 2 Extinguishment of n-Butane Diffusion Flames _______________________________________________________________ Agent Air flow Agent required Extinguishing Conc.
cc/min cc/min % v/v mg/L
_______________________________________________________________ HCF2CF2C1 16,200 1158 6.7 372 CF2BrC1 16,200 420 2.5 168 CF3Br 16,200 396 2.4 146 _______________________________________________________________ While the bromine or chlorine containing agents CF3Br and CF2BrCl are somewhat more effective than HCF2CF2Cl, the use oE HCF2CF2Cl in accordance with this invention remains highly effective and its use avoids the significant environmental handicaps encountered with totally halogenated agents.
Claims (8)
1. A method of extinguishing a fire comprising the steps of introducing to the fire a fire extinguishing concentration of 1-chloro-1,1,2,2-tetrafluoroethane, and maintaining the fire extinguishing concentration until the fire is extinguished.
2. The method of Claim 1 wherein 1-chloro-1,1,2,2-tetrafluoroethane is introduced to the fire at a concentration relative the air surrounding the fire of less than 15% (v/v).
3. The method of Claim 1 wherein the 1-chloro-1,1,2,2-tetrafluoroethane is introduced to the fire at a concentration relative the air surrounding the fire of from 3 to 10% (v/v).
4. The method of Claim 1 wherein said introducing step includes introducing the 1-chloro-1,1,2,2-tetrafluoroethane through a total flooding system.
5. The method of Claim 1 wherein said introducing step includes introducing the 1-chloro-1,1,2,2-tetrafluoroethane through a portable extinguishing system.
6. A method for extinguishing a fire comprising the steps of:
introducing to the fire a fire extinguishing concentration of a mixture comprising:
HCF2CF2C1, and one or more compounds selected from the group CF3Br, CF2BrC1, BrCF2CF2Br, CF3CHFBr, CF3CHC12, CF3CHFC1, CF3CF2C1, CF3CF2H, CF3CHFCF3, CF2HC1, CF3H, and wherein HCF2CF2C1 is at a level of at least about 1%
by weight of the mixture and maintaining the fire extinguishing concentration of the mixture until the fire is extinguished.
introducing to the fire a fire extinguishing concentration of a mixture comprising:
HCF2CF2C1, and one or more compounds selected from the group CF3Br, CF2BrC1, BrCF2CF2Br, CF3CHFBr, CF3CHC12, CF3CHFC1, CF3CF2C1, CF3CF2H, CF3CHFCF3, CF2HC1, CF3H, and wherein HCF2CF2C1 is at a level of at least about 1%
by weight of the mixture and maintaining the fire extinguishing concentration of the mixture until the fire is extinguished.
7. The method of Claim 1 where a compound selected from the group nitrogen, C02, and argon is employed as a propellant.
8. The method of Claim 6 wherein a compound selected from the group consisting of nitrogen, C02, and argon is employed as a propellant.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US55863590A | 1990-07-26 | 1990-07-26 | |
| US07/558,635 | 1990-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2047800A1 true CA2047800A1 (en) | 1992-01-27 |
Family
ID=24230322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002047800A Abandoned CA2047800A1 (en) | 1990-07-26 | 1991-07-24 | Fire extinguishing methods utilizing 1-chloro-1,1,2,2-tetrafluoroethane |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN1059286A (en) |
| AU (1) | AU8416891A (en) |
| CA (1) | CA2047800A1 (en) |
| WO (1) | WO1992001490A1 (en) |
| ZA (1) | ZA915744B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2021981A (en) * | 1930-06-23 | 1935-11-26 | Gen Motors Corp | Self propelling fire extinguishing charge containing a double halogen hydrocarbon compound |
| US1926395A (en) * | 1930-07-31 | 1933-09-12 | Frigidaire Corp | Process of preventing fire by nontoxic substances |
| US1926396A (en) * | 1930-07-31 | 1933-09-12 | Frigidaire Corp | Process of preventing fire by nontoxic substances |
| GB1368443A (en) * | 1972-06-12 | 1974-09-25 | Ici Ltd | Fire-fighting |
| GB8903334D0 (en) * | 1989-02-14 | 1989-04-05 | Ici Plc | Flame extinguishing compositions |
-
1991
- 1991-07-22 ZA ZA915744A patent/ZA915744B/en unknown
- 1991-07-22 WO PCT/US1991/005138 patent/WO1992001490A1/en active Application Filing
- 1991-07-22 AU AU84168/91A patent/AU8416891A/en not_active Abandoned
- 1991-07-24 CA CA002047800A patent/CA2047800A1/en not_active Abandoned
- 1991-07-26 CN CN91105781A patent/CN1059286A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN1059286A (en) | 1992-03-11 |
| WO1992001490A1 (en) | 1992-02-06 |
| AU8416891A (en) | 1992-02-18 |
| ZA915744B (en) | 1992-05-27 |
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