Fire extinguishing composition and process
AssigneeE. I. Du Pont de Nemours and Company
InventorRichard E. Fernandez
Life of this patent
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Abstract
A process for extinguishing, preventing and controlling fires using a composition containing at least one fluoro-substituted propane selected from the group of 2,2-dichloro-1,1,1-trifluoroethane (CHCl.sub.2 CF.sub.3), 2-chloro-1,1,1,2-tetrafluoroethane (CHClFCF.sub.3), and 1,1,1,2-tetrafluoroethane (CH.sub.2 FCF.sub.3), and mixtures thereof is disclosed. The fluoropropanes can be used in open or enclosed areas with little or no effect on the ozone in the stratosphere and with little effect on the global warming process.
Claims12
A method of using a fire extinguishing agent comprising:
- manually discharging a fire extinguishing agent from a portable fire extinguisher upon a fire to be extinguished, wherein the fire extinguishing agent comprises a halogenated alkane composition selected from the group consisting of 2,2-dichloro-1,1,1-trifluoroethane (CHCl.sub.2 CF.sub.3), 2-chloro-1,1,1,2-tetrafluoroethane (CHClFCF.sub.3), 1,1,1,2-tetrafluoroethane (CH.sub.2 FCF.sub.3), and mixtures thereof.
A method for extinguishing a fire which comprises the steps of:
- (a) introducing to the fire a fire extinguishing concentration of an extinguishant composition selected from the group consisting of 2-chloro-1,1,1,2-tetrafluoroethane and 2-chloro-1,1,2,2-tetrafluoroethane and a second extinguishant selected from the group consisting of heptafluoropropane (CF.sub.3 CHFCF.sub.3), 1,1,1,3,3,3-hexafluoropropane (CF.sub.3 CH.sub.2 CF.sub.3), 1,1,1,2,3,3-hexafluoropropane (CF.sub.3 CHFCHF.sub.2), pentafluoroethane (CF.sub.3 CHF.sub.2) and mixtures thereof;
- and
- (b) maintaining the concentration of the composition until the fire is extinguished.
A method for extinguishing a fire comprising the steps of:
- introducing to the fire a fire-extinguishing concentration of a composition consisting essentially of pentafluoroethane;
- and maintaining the concentration of the composition until the fire is extinguished.
A method of using a fire extinguishing agent comprising the step of flooding the fire with a fire extinguishing agent which consists of a halogenated alkane composition selected from the group consisting of pentafluoroethane (CF.sub.3 CHF.sub.2);
- 1,1,2,2-tetrafluoroethane (CHF.sub.2 CHF.sub.2);
- 1,1,2-tetrafluoroethane (CH.sub.2 FCF.sub.3);
- 2-chloro-1,1,1,2-tetrafluoroethane (CHClFCF.sub.3) and mixtures thereof.
A method for extinguishing a fire which comprises the steps of:
- (a) introducing to the fire a fire extinguishing concentration of an extinguishant composition consisting of 2-chloro-1,1,1,2-tetrafluoroethane and a second extinguishant selected from the group consisting of heptafluoropropane (CF.sub.3 CHFCF.sub.3), 1,1,1,3,3,3-hexafluoropropane (CF.sub.3 CH.sub.2 CF.sub.3), 1,1,1,2,3,3-hexafluoropropane (CF.sub.3 CHFCHF.sub.2), pentafluoroethane (CF.sub.3 CHF.sub.2) and mixtures thereof;
- and
- (b) maintaining the concentration of the composition until the fire is extinguished.
Dependencies are inferred from the claim text.