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WO1992001490A1 - Procedes d'extinction d'incendies utilisant du 1-chloro-1,1,2,2-tetrafluoroethane - Google Patents

Procedes d'extinction d'incendies utilisant du 1-chloro-1,1,2,2-tetrafluoroethane Download PDF

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Publication number
WO1992001490A1
WO1992001490A1 PCT/US1991/005138 US9105138W WO9201490A1 WO 1992001490 A1 WO1992001490 A1 WO 1992001490A1 US 9105138 W US9105138 W US 9105138W WO 9201490 A1 WO9201490 A1 WO 9201490A1
Authority
WO
WIPO (PCT)
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.)
Ceased
Application number
PCT/US1991/005138
Other languages
English (en)
Inventor
Mark Lester Robin
Yuichi Iikubo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Great Lakes Chemical Corp
Original Assignee
Great Lakes Chemical Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Great Lakes Chemical Corp filed Critical Great Lakes Chemical Corp
Publication of WO1992001490A1 publication Critical patent/WO1992001490A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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

Definitions

  • This invention relates to fire extinguishing methods utilizing 1-Chloro-l,1,2,2- tetrafluoroethane, HCF2CF2C1.
  • the three fire extinguishing agents presently in common use are all bromine-containing compounds, bromotrifluoro ethane (CF3Br), bromochlorodifluoromethane (CF2BrCl), and dibromotetrafluoroethane (BrCF2CF2Br) . 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 (CF3CF2C1) as described in US Patent 3,844,354 to Larsen.
  • bromine or chlorine-containing agents are effective in extinguishing fires, totally halogenated agents such as CF3Br, CF2BrCl and CF3CF2C1 containing bromine or chlorine are asserted by some to be capable of the destruction of the earth's protective ozone layer.
  • HCF2CF2C1 1-chloro-l,1,2,2-tetrafluoroethane
  • HCF2CF2C1 1-chloro-l,1,2,2-tetrafluoroethane
  • the method of this invention involves introducing to a fire 1-chloro-l,1,2,2-tetrafluoroethane in a fire extinguishing concentration and maintaining such concentration until the fire is extinguished.
  • 1-Chloro-l,1,2,2-tetrafluoroethane may be used alone or in admixture with other compounds, optionally in the presence of a propellant. Generally 1-chloro-l,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.
  • 1-chloro-l,1,2,2-tetrafluoroethane has been found to be an effective fire extinguishing agent at concentrations safe for use.
  • 1-chloro-l,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 hydroxyl radicals.
  • 1-chloro-l,1,2,2-tetrafluoroethane has an ODP of 0.03, compared to ODP values of 14.26 and 2.65 for the presently employed agents CF3Br and CF2BrCl, respectively, a reduction in ODP of greater than 99% in each case.
  • 1-Chloro-l,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, Fluorine Chemistry, volume 3, and is hence effective at concentrations well below levels harmful to living things.
  • 1-Chloro-l,1,2,2-tetrafluoroethane may be used alone or in admixture with other compounds, optionally in the presence of a propellant.
  • compounds with which • 1-chloro-l,1,2,2-tetrafluoroethane may be blended are chlorine and/or bromine containing compounds such as CF3Br, CF2BrCl, CF3CF2C1, and BrCF2CF2Br.
  • 1-Chloro-l,1,2,2-tetrafluoroethane may be effectively employed at substantially any minimum concentration at which the fire may be extinguished, the exact minimum level being dependent on the particular combustible material, and the combustion conditions. In general, best results are achieved where 1-chloro-l,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 of economics and potential toxicity to living things. About 15% provides a convenient maximum for use of 1-chloro-l,1,2,2- tetrafluoroethane and its mixtures thereof in occupied areas. Concentrations above 15% may be employed in non-occupied areas, with the exact level determined by the particular combustible material and the conditions of combustion.
  • 1-Chloro-l,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, 1-chloro-l,1,2,2-tetrafluoroethane may be pressurized with nitrogen or other inert gas at up to about 600 psig at ambient conditions.
  • 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 HCF2CF2C1. Values for CF3Br and CF2BrCl are included for reference purposes.
  • HCF2CF2C1 While the bromine or chlorine containing agents CF3Br and CF2BrCl are somewhat more effective than HCF2CF2C1, the use of HCF2CF2C1 in accordance with this invention remains highly effective and its use avoids the significant environmental handicaps encountered with totally halogenated agents.

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  • 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

Le 1-chloro-1,1,2,2-tétrafluoroéthane est un agent d'extinction d'incendies protégeant l'ozone utilisé seul ou dans des mélanges avec d'autres composés dans des systèmes anti-incendie à inondage total et portatifs.
PCT/US1991/005138 1990-07-26 1991-07-22 Procedes d'extinction d'incendies utilisant du 1-chloro-1,1,2,2-tetrafluoroethane Ceased WO1992001490A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US55863590A 1990-07-26 1990-07-26
US558,635 1990-07-26

Publications (1)

Publication Number Publication Date
WO1992001490A1 true WO1992001490A1 (fr) 1992-02-06

Family

ID=24230322

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1991/005138 Ceased WO1992001490A1 (fr) 1990-07-26 1991-07-22 Procedes d'extinction d'incendies utilisant du 1-chloro-1,1,2,2-tetrafluoroethane

Country Status (5)

Country Link
CN (1) CN1059286A (fr)
AU (1) AU8416891A (fr)
CA (1) CA2047800A1 (fr)
WO (1) WO1992001490A1 (fr)
ZA (1) ZA915744B (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US2021981A (en) * 1930-06-23 1935-11-26 Gen Motors Corp Self propelling fire extinguishing charge containing a double halogen hydrocarbon compound
GB1368443A (en) * 1972-06-12 1974-09-25 Ici Ltd Fire-fighting
EP0383443A2 (fr) * 1989-02-14 1990-08-22 Imperial Chemical Industries Plc Compositions extinctrices d'incendies

Patent Citations (5)

* Cited by examiner, † Cited by third party
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
EP0383443A2 (fr) * 1989-02-14 1990-08-22 Imperial Chemical Industries Plc Compositions extinctrices d'incendies

Also Published As

Publication number Publication date
CN1059286A (zh) 1992-03-11
ZA915744B (en) 1992-05-27
CA2047800A1 (fr) 1992-01-27
AU8416891A (en) 1992-02-18

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