Oxygen generating compositions
First Claim
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1. An oxygen generating composition for producing a breathable oxygen gas upon ignition of the composition, comprising:
- a metal powder as a fuel, said fuel selected from the group consisting of copper, zinc and antimony, combinations thereof, combinations thereof with tin, and combinations thereof with iron;
at least one alkaline compound;
at least one transition metal oxide catalyst; and
an oxygen source selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, and mixtures thereof, said composition being operable for producing breathable oxygen for a period of several minutes.
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Abstract
The oxygen generating compositions contain carbon-free metal powder as fuel to minimize generation of carbon monoxide. The carbon-free metal powder can be selected from copper, zinc, and antimony, and mixtures thereof, and can be used in combination with tin or iron. The oxygen generating compositions produce a breathable gas upon ignition of the composition, and comprise about 1-15% by dry weight of the metal powder as a fuel; about 0.1-5% by dry weight of at least one alkaline compound; a transition metal oxide catalyst; and the remainder substantially comprising an oxygen source. The oxygen generating compositions can optionally include a binder. An oxygen generating candle can also have an ignition pellet having a composition of about 25-50% by weight copper, zinc or antimony, 5-20% by weight Co3 O4, about 2-5% by weight glass powder, 0-25% by weight KClO4, and the balance being substantially NaClO3.
28 Citations
23 Claims
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1. An oxygen generating composition for producing a breathable oxygen gas upon ignition of the composition, comprising:
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a metal powder as a fuel, said fuel selected from the group consisting of copper, zinc and antimony, combinations thereof, combinations thereof with tin, and combinations thereof with iron; at least one alkaline compound; at least one transition metal oxide catalyst; and an oxygen source selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, and mixtures thereof, said composition being operable for producing breathable oxygen for a period of several minutes. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An oxygen generating composition for producing a breathable oxygen gas upon ignition of the composition, consisting essentially of:
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about 1-15% by dry weight of metal powder as a fuel, selected from the group consisting of copper, zinc and antimony, combinations thereof, combinations thereof with tin, and combinations thereof with iron; about 0.1-5% by dry weight of at least one alkaline compound, the alkaline compound having a metal moiety selected from the group consisting of magnesium, calcium, lithium and strontium, and the alkaline compound having an oxide moiety selected from the group consisting of oxides, peroxides, superoxides, and hydroxides; about 0.1 to 15% by dry weight of at least one transition metal oxide catalyst; from zero to about 5% by dry weight of a binder material; and the remainder substantially comprising an oxygen source selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, and mixtures thereof said composition being operable for producing breathable oxygen for a period of several minutes. - View Dependent Claims (9, 10, 11)
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12. An oxygen generating candle for producing a breathable oxygen gas upon ignition of the candle, said candle comprising:
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a plurality of layers of oxygen generating compositions, each including a metal powder as a fuel, said metal powder being selected from the group consisting of copper, zinc and antimony, combinations thereof, combinations thereof with tin, and combinations thereof with iron;
at least one alkaline compound;
at least one transition metal oxide catalyst; and
an oxygen source selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, and mixtures thereof; andan ignition pellet adjacent to one of said layers, said ignition pellet consisting essentially of about 25-50% by weight of a metal fuel selected from the group consisting of copper, zinc and antimony;
about 5-20% by weight Co3 O4 ;
about 2-5% by weight glass powder;
0-25% by weight KClO4, and the remainder being substantially NaClO3, said oxygen generating candle being operable for producing breathable oxygen for a period of several minutes. - View Dependent Claims (13, 14, 15, 16, 17)
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18. An oxygen generating candle for producing a breathable oxygen gas upon ignition of the candle, said candle comprising:
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a plurality of layers of oxygen generating compositions each including about 1-15% by dry weight of metal powder as a fuel, selected from the group consisting of copper, zinc and antimony, combinations thereof, combinations thereof with tin, and combinations thereof with iron;
about 0.1-5% by dry weight of at least one alkaline compound, the alkaline compound having a metal moiety selected from the group consisting of magnesium, calcium, lithium and strontium, and the alkaline compound having an oxide moiety selected from the group consisting of oxides, peroxides, superoxides, and hydroxides;
about 0.1 to 15% by dry weight of at least one transition metal oxide catalyst;
from zero to about 5% by dry weight of a binder material; and
the remainder substantially comprising an oxygen source selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, and mixtures thereof; andan ignition pellet consisting essentially of about 25-50% by weight of a metal fuel selected from the group consisting of copper, zinc and antimony;
about 5-20% by weight Co3 O4 ;
about 2-5% by weight glass powder;
0-25% by weight KClO4, and the remainder being substantially NaClO3, said oxygen venerating candle being operable for producing breathable oxygen for a period of several minutes. - View Dependent Claims (19, 20, 21)
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22. An ignition pellet for an oxygen generating candle producing a breathable oxygen gas upon ignition of the ignition pellet, said ignition pellet consisting essentially of:
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about 25-50% by weight of a metal fuel selected from the group consisting of copper, zinc and antimony; about 5-20% by weight Co3 O4 ; about 2-5% by weight glass powder; 0-25% by weight KClO4 ; and the remainder being substantially NaClO3, said composition being useful for igniting a chemical oxygen generating mass. - View Dependent Claims (23)
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Specification
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Current AssigneeBE Intellectual Property, Inc. (Raytheon Technologies Corporation d/b/a RTX)
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Original AssigneeB/E Intellectual Property, Inc.
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InventorsKshirsagar, Girish S., Cannon, James C., Zhang, Yunchang
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Primary Examiner(s)ANTHONY, JOSEPH DAVID
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Application NumberUS09/017,014Time in Patent Office757 DaysField of Search252/187.1, 252/187.31, 422/126, 149/77, 149/113US Class Current422/126CPC Class CodesC01B 13/0211 Peroxy compoundsC01B 13/0218 ChlorateC01B 13/0296 Generators releasing in a s...
