US2212470A - Fire extinguishing compound - Google Patents

Fire extinguishing compound Download PDF

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Publication number
US2212470A
US2212470A US278914A US27891439A US2212470A US 2212470 A US2212470 A US 2212470A US 278914 A US278914 A US 278914A US 27891439 A US27891439 A US 27891439A US 2212470 A US2212470 A US 2212470A
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United States
Prior art keywords
compound
foam
solution
fire extinguishing
aluminum
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Expired - Lifetime
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US278914A
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Friedrich Karl
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Individual
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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
    • A62D1/0071—Foams
    • A62D1/0078—Foams containing proteins or protein derivatives

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing Compositions (AREA)

Description

Patented Aug. 20,1940
UNITED STATES PATENT orriss 2,212,470 .rmn EXTINGUISHING COMPOUND Karl Friedrich, Berlin-Wllmersdorf, Germany No Drawing. Applllilcation June is, 1939, Serial Germany May 4, 1938 Claims. (CI. 23-11) resistance to heat and other physical or chem ical influences than the foams hitherto known.
Consequently the extinguishing compoundform-' ing the object of the invention is especially suitable for cases injwhich an otherwise hardly extinguishable fire, as for instance that caused by alcohol, aromatic hydrocarbons and the like, is to be combated.
The compoundaccording to the invention consists in a mixture of solubilized proteins or materials containing protein and a small percentage ofa soluble aluminum compound. The inventor has ascertainedthat even a very small addition of a soluble aluminum compound sufiices to increase the stability or a foam produced by means of proteinous material to a considerable extent. Suchaluminum compounds may be, for instance. as aluminum salts or aluminates. The fire exting compound according to the invention may be obtained, for instance, in the following manner: 7
1 kilogram of keratin is solubilized by. heating m the material with 150 grams of slaked lime and 3 to 5 kilograms of water. The resulting mass is neutralized by the addition of surfuric acid and subjected to filtration. The filtrate is-evaporated to a specific gravity-o! 1.15. To 1 kilogram of 5 the resulting liquid a solution of 20 grams of aluminum hydroxide in an excess of acetic acid is added whilst stirring and finally the liquid is neutralized solution.
by v the addition oi. caustic soda A solution of -1 kilogram of this .liquid in 20 liters of water when subjected to the action of a suitable air-foam producer is transformed into an extraordinarily tough foam from which the liquid contained therein separates twice to three 6 times as slowly as a foam obtained under similar conditions from a solution having the same strength without the addition of an aluminum compound.
Instead of aluminum acetate another soluble 10 aluminum compound, for instance, aluminum lactate or an aluminate may be added to the foam forming liquid. The use of aluminum salts of organic acids has proved especially advantageous. I5-
I claim:
1. A foam-forming compound for extinguishing fire, consisting of a solution of a solubilized proteinous material and a small quantity of a soluble aluminum compound. 20
2. A foam-forming compound for extinguishing fire, consisting of a solution or a solubilized keratinous material and a small quantity of a soluble aluminum compound.
3. A foam-forming compound for extinguishing fire, consisting of a solution of a solubilized pro- "teinous material and a small quantity of a soluble aluminum salt 01' an organic acid.
4.A-foam-1orming compound for extin ishing fire. consisting of a solution of a solubilized proteinous material and a smallquantity of aluminum acetate.
5. A foam-forming compound for extinguishing fire, consisting or a solution of a solubilized proteinous material and a small quantity of alumi- 1mm lactate.
; KARL FRIEDRICH.
US278914A 1938-05-04 1939-06-13 Fire extinguishing compound Expired - Lifetime US2212470A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2212470X 1938-05-04

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US2212470A true US2212470A (en) 1940-08-20

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431256A (en) * 1944-11-27 1947-11-18 Armour & Co Proteinaceous foam-stabilizing composition and the preparation thereof
US2477255A (en) * 1947-10-10 1949-07-26 Armour & Co Treatment of proteins
US2481875A (en) * 1945-01-01 1949-09-13 Pyrene Co Ltd Method of producing a stable foam generating composition
US2521582A (en) * 1944-11-27 1950-09-05 Armour & Co Treatment of keratinaceous materials
US2597566A (en) * 1949-11-19 1952-05-20 Frank Gardner Method of preparing a soluble protein from keratinaceous materials
US2618594A (en) * 1948-12-02 1952-11-18 Macandrews & Forbes Co Foam-producing composition and method of preparing same
US2721861A (en) * 1951-10-01 1955-10-25 Laurene O Paterson Process of preparing an aluminum caseinate
US2758969A (en) * 1954-12-31 1956-08-14 Nat Foam System Inc Foam-forming composition
US2865905A (en) * 1954-07-13 1958-12-23 Nat Gypsum Co Plaster retarder and method of making same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431256A (en) * 1944-11-27 1947-11-18 Armour & Co Proteinaceous foam-stabilizing composition and the preparation thereof
US2521582A (en) * 1944-11-27 1950-09-05 Armour & Co Treatment of keratinaceous materials
US2481875A (en) * 1945-01-01 1949-09-13 Pyrene Co Ltd Method of producing a stable foam generating composition
US2477255A (en) * 1947-10-10 1949-07-26 Armour & Co Treatment of proteins
US2618594A (en) * 1948-12-02 1952-11-18 Macandrews & Forbes Co Foam-producing composition and method of preparing same
US2597566A (en) * 1949-11-19 1952-05-20 Frank Gardner Method of preparing a soluble protein from keratinaceous materials
US2721861A (en) * 1951-10-01 1955-10-25 Laurene O Paterson Process of preparing an aluminum caseinate
US2865905A (en) * 1954-07-13 1958-12-23 Nat Gypsum Co Plaster retarder and method of making same
US2758969A (en) * 1954-12-31 1956-08-14 Nat Foam System Inc Foam-forming composition

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