Oxygen-generating compositions comprising thermally treated (Fe,Mg)O

• US 10,435,298 B2
• Filed: 10/18/2016
• Issued: 10/08/2019
• Est. Priority Date: 10/20/2015
• Status: Expired due to Fees

• Current Assignee: Diehl Aviation Gilching GmbH
• Original Assignee: Diehl Aviation Gilching GmbH
• Inventors: Kallfass, Christoph, Hejczyk, Artur, Simon, Ulla
• Primary Examiner(s): Swain, Melissa S
• Application Number:
  US15/296,579
• Publication Number:
  US 20170107107A1
• Time in Patent Office: 1,085 Days
• Field of Search: None
• CPC Class Codes: C01B 13/0218 Chlorate
• CPC Class Codes: C01B 13/0296 Generators releasing in a self-sustaining way pure oxygen from a solid charge, without interaction of it with a fluid nor external heating, e.g. chlorate candles or canisters containing them charges per se C01B13/02

Abstract

The present disclosure provides an oxygen-generating composition comprising an oxygen source and mixed-metal oxide of formula: (Fe,Mg)O, wherein said mixed-metal oxide is in at least partially crystalline form.

Claims

1. An oxygen-generating composition comprising:

an oxygen source; and

a mixed-metal oxide of formula;

(Fe,Mg)O, wherein said mixed-metal oxide is in at least partially crystalline form;

wherein the oxidation state of Fe in the mixed metal oxide is +2 or +3; and

wherein the composition generates oxygen when the oxygen source is decomposed in the presence of the mixed-metal oxide.

2. The composition as claimed in claim 1 wherein said mixed-metal oxide is a thermally treated oxide.

3. The composition as claimed in claim 1, wherein at least 50% of the mixed-metal oxide is crystalline.

4. The composition as claimed in claim 1, wherein said mixed-metal oxide comprises 2 to 8 at. % Fe.

5. The composition as claimed in claim 1, wherein said mixed-metal oxide is in the form of nano-particles.

6. The composition as claimed in claim 5 wherein said nano-particles have a diameter of less than or equal to 500 nm.

7. The composition as claimed in claim 1, wherein said oxygen source is selected from alkali metal chlorates, alkali metal perchlorates, alkaline earth metal chlorates, alkaline earth metal perchlorates and mixtures thereof.

8. The composition as claimed claim 1, wherein said oxygen source comprises sodium chlorate and/or lithium perchlorate.

9. The composition as claimed in claim 1, wherein said composition consists essentially of said oxygen source and said mixed-metal oxide.

10. The composition as claimed in claim 1, wherein 90 to 99.9 wt. % of said composition is said oxygen source.

11. The composition as claimed in claim 1, wherein 0.1 to 10 wt. % of said composition is said mixed-metal oxide.

13. A chemical oxygen-generator comprising an oxygen-generating composition as claimed in claim 1.

14. The chemical oxygen-generator as claimed in claim 13 wherein said generator comprises a container for containing the oxygen-generating composition and a primer for starting decomposition of the oxygen-generating composition.

15. The chemical oxygen-generator as claimed in claim 13 wherein said chemical oxygen-generator is a chemical oxygen candle.

12. A method for generating oxygen, said method comprising decomposing an oxygen source in the presence of a mixed-metal oxide having the formula (Fe,Mg)O in which an oxidation state of Fe is +2 or +3.