Process for Creating An Oxygen Scavenging Particle

Abstract

A method is disclosed for manufacturing one or more oxygen scavenging particles, wherein the particle(s) comprises an oxidizable metal particle, such as elemental iron; an acidifying electrolyte such as sodium or potassium bisulfate and optionally a water hydrolysable Lewis acid, such as aluminum chloride. The method comprises the step of coating the oxidizable particle with a first compound and then reacting the first compound with a second compound to form a third compound, wherein the third compound promotes the reaction of the oxidizable particle with oxygen.

Description

Claims

1. A method for creating an oxygen scavenging particle comprising the steps of (A) depositing a first compound which is a precursor compound onto an oxidizable particle; wherein said first compound is capable of being reacted with a second compound which is a reactive compound to form a third compound which is an acidifying electrolyte wherein the third compound is capable of initiating the reaction of the oxidizable particle with oxygen;(B) exposing said oxidizable particle with the deposited first compound to the second compound under conditions sufficient for said second reactive compound to react with the first compound to form the third compound which is capable of initiating the reaction of the oxidizable particle with oxygen when the oxidizable particle and the third compound are exposed to water.

2. The method of claim 1 wherein the first compound is a metal hydroxide.

3. The method of claim 2 wherein the reactive compound is SO3.

4. The process of claim 1, wherein the first compound is selected from the group consisting of sodium hydroxide and potassium hydroxide.

5. The method of claim 4 wherein the reactive compound is SO3.

6. The method of claim 1, wherein the particle is exposed to a further step wherein a water hydrolysable Lewis acid is deposited upon the oxidizable particle.

7. The method of claim 6, wherein the water hydrolysable Lewis acid is selected from the group consisting of titanium tetrachloride, tin tetrachloride, and POCl3, SOCl2, SCl2, S2Cl2, PCl3, PSCl3, PBr3, POBr3, PSBr3, PCl5, PBr5, SiCl4, GeCl4, SbCl5, AlCl3, FeCl2, FeCl3, AlBr3, SbCl3, SbBr3, and ZrCl4.

8. A method for creating an oxygen scavenging particle comprising the steps of (A) depositing a first compound onto an oxidizable particle; wherein said first compound is capable of being reacted with a second compound to form a third compound wherein said third compound is capable of be reacted with a fourth compound to form a fifth compound wherein the fifth compound is an acidifying electrolyte capable of initiating the reaction of the oxidizable particle with oxygen;(B) exposing said oxidizable particle with the deposited the first compound to the second compound under conditions sufficient for said second compound to react with said first compound to form the third compound(C) exposing said oxidizable particle with the third compound to the fourth compound under conditions sufficient for said third compound to react with the fourth compound and form the fifth compound which is an acidifying electrolyte capable of initiating the reaction of the oxidizable particle with oxygen when the oxidizable particle and the third compound are exposed to water.

9. The method of claim 8, wherein the particle is exposed to a further step wherein a water hydrolysable Lewis acid is deposited upon the oxidizable particle.

10. The method of claim 9, wherein the water hydrolysable Lewis acid is selected from the group consisting of titanium tetrachloride, tin tetrachloride, and POCl3, SOCl2, SCl2, S2Cl2, PCl3, PSCl3, PBr3, POBr3, PSBr3, PCl5, PBr5, SiCl4, GeCl4, SbCl5, AlCl3, FeCl2, FeCl3, AlBr3, SbCl3, SbBr3, and ZrCl4.