Compositions – Fire-extinguishing
Patent
1990-01-26
1992-07-21
Stoll, Robert L.
Compositions
Fire-extinguishing
252 8D, 169 44, 169 46, 169 47, A62D 100
Patent
active
051320304
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The invention refers to the use of a clay mineral mixture as a fire-extinguishing substance. Typical fire-extinguishing substances are water or organic foams.
It results from DE-AS 1 211 946 that in addition, chemical material and material mixtures, such as viscosity-increasing substances, among others, clays or gel formers for example, as well as gas-forming materials, for example sodium hydrogen carbonate for example, were used to make water more effective for fire fighting. A disadvantage of using clays is that they merely soak up water slowly and cause abrasion of the pump equipment (Column 1, lines 13 to 15 of the DE-AS 1 211 946).
The fire extinguishing substances proposed in DE-AS 1 211 946 contains CO.sub.2 -releasing salts in combination with organic acids and as mica components flaked or rolled up and then granulated vermiculite. In this case also, however, a plastic mass that can only be handled with difficulty is created.
A dry chemical mixture as a fire extinguishing foam is known from the DE-PS 570 456. The mixture consists of aluminum sulphate, sodium carbonate and saponin, to which from 8 to 35% of a kaoline additive can also be added according to Page 1, lines 50 to 55 which, however reduces the foam productiveness. Besides this consequence, the familiar dry chemical products mixture did not gain acceptance because fire extinguishing foams cannot be made available in large quantities for forest fire fighting, for example.
The fire extinguishing substances known from the DE-PS 608 037 consist of artificial, inorganic, porous, active masses loaded with extinguishing fluid, with carbontetrachloride as the extinguishing fluid. For practical feasibility, the use of carbon tetrachloride must already be excluded at present due to environmental criteria.
A dry fire extinguishing powder of a bicarbonate base for special use against burning, pyrophorous liquids, such as metal alkyls and particularly triethyl and methyl aluminum and boron has been made public by the DE-AS 1 130 294, with up to 25% alumina, bentonite, fuller earth, halloysite and silicic acid gel intended as adsorption agents (Column 3, lines 1 through 6). In this dry fire extinguishing powder, the burning metal alkyls are to be provided with a coating and the fire site thus choked off. It can therefore not be used for large surface fires.
A fire choking effect should also be obtained with the fire extinguishing substances according to the DE-PS 746 963 as well (Page 1, lines 21 to 25), for which the substances are to consist of a mixture of sand and an alkali earth carbonate. Most of the aforementioned fire extinguishing substances contain considerable chemical components and for this reason, have not gained acceptance particularly because of environmental criteria. Furthermore, in the form of foams or plastic masses they are not suited to extinguish large surface fire sites.
The present invention is, in light of this, based on the task of offering a fire extinguishing substance that also can be used or is suited for use in large quantities particularly for fighting large surface fires, with the substance being easy to handle and, above all, it should not have any environmentally damaging components; moreover, an attempt is being made to provide a fire extinguishing substance that not only displays an optimal fire extinguishing effect but also, beyond the fulfillment of this function, is as tolerable as possible for the environment and needs no separate disposal as is the case for chemical-based fire extinguishing substances.
For large surface fires such as forest fires or fires at industrial plants, there is often a considerable emission of toxic substances through the smoke gases, and this therefore represents a further feature of the present invention, namely to develop the fire extinguishing substance preferably in such a way that this toxic substance emission is also reduced, at least partially.
The invention is based on the perception that the familiar disadvantages in the present state of the art can be overcome i
REFERENCES:
patent: 3080316 (1963-03-01), Petertyl et al.
patent: 4070315 (1978-01-01), Mehta et al.
patent: 4664843 (1987-05-01), Burba, III et al.
patent: 4790954 (1988-12-01), Burba, III et al.
A. Earley John F.
A. Earley III John F.
Bhat N.
Stoll Robert L.
LandOfFree
Fire-extinguishing substance does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fire-extinguishing substance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fire-extinguishing substance will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-841524