Decontaminant dispenser suitable for use as a projectile

• US 8,460,605 B2
• Filed: 02/20/2008
• Issued: 06/11/2013
• Est. Priority Date: 03/06/2007
• Status: Active Grant

• Current Assignee: Steris Inc (Steris Corporation)
• Original Assignee: Steris Inc (Steris Corporation)
• Inventors: Meilander, Timothy W., Wiger, Paul W., McVey, Iain F., Centanni, Michael A.
• Primary Examiner(s): JOHNSON, EDWARD M
• Application Number:
  US12/033,905
• Publication Number:
  US 20120156095A1
• Time in Patent Office: 1,938 Days
• Field of Search: 422/28, 588/900, 588/313, 588/318, 588/405, 588/410
• US Class Current: 422/28
• CPC Class Codes: A61L 2/208 Hydrogen peroxide
• CPC Class Codes: A61L 2202/122 Chambers for sterilisation
• CPC Class Codes: A61L 2202/26 Textiles, e.g. towels, beds, cloths

Abstract

The disclosed invention relates to a decontaminant dispenser which may be used as a projectile. The invention also relates to a decontamination process using the decontaminant dispenser. The decontaminant dispenser may be thrown by hand, launched as an artillery shell or the payload for a missile, or dropped by an airplane into the area to be decontaminated. The dispenser may be placed in the area to be decontaminated. The decontaminant dispenser may be ruggedized for use in hostile environments such as those that may be anticipated for military applications.

Claims

1. A decontaminant dispenser suitable for use as a projectile, comprising:

a container suitable for containing propellant grade liquid hydrogen peroxide, the container comprising a container wall with at least one opening in the container wall and a pressure release membrane positioned in the opening, the pressure release membrane being adapted to rupture when pressure within the container exceeds a predetermined value; and

at least one catalytic probe adapted to be inserted into the container in contact with the liquid hydrogen peroxide, the catalytic probe being undersized so that when inserted into the container in contact with the hydrogen peroxide part of the hydrogen peroxide in the container reacts in an exothermic reaction to form a product composition, the product composition comprising water, oxygen, and unreacted hydrogen peroxide, the reaction being sufficient to generate an expansion of the product composition, the expansion being sufficient to rupture the pressure release membrane and drive the unreacted hydrogen peroxide through the at least one opening.

2. The dispenser of claim 1 wherein the container comprises an inner chamber and an outer chamber, the inner chamber being positioned within the outer chamber;

the inner chamber being suitable for containing propellant grade liquid hydrogen peroxide, the inner chamber comprising an inner chamber wall with at least one inner opening in the inner chamber wall and an inner pressure release membrane positioned in the inner opening, the inner pressure release membrane being adapted to rupture when the pressure within the inner chamber exceeds a predetermined value;

the outer chamber being suitable for containing gaseous ammonia, the outer chamber comprising an outer chamber wall with at least one outer opening in the outer chamber wall and an outer pressure release membrane positioned in the outer opening, the outer pressure release membrane being adapted to rupture when the pressure within the outer chamber exceeds a predetermined value;

the catalytic probe being adapted to be inserted through the outer chamber into the inner chamber in contact with the liquid hydrogen peroxide.

3. The dispenser of claim 1 wherein the dispenser is ruggedized.

4. The dispenser of claim 2 wherein the dispenser is ruggedized.

5. The dispenser of claim 1 wherein the dispenser has a cylindrical or a spherical shape.

6. The dispenser of claim 1 wherein the container is made of a metal alloy that does not react with hydrogen peroxide.

7. The dispenser of claim 1 wherein the container is made of a material which comprises stainless steel, coated steel, an aluminum alloy or anodized aluminum.

8. The dispenser of claim 1 wherein the pressure release membrane is made of a material which comprises aluminized polyolefin, polyester, polytetrafluoroethylene or spun polyethylene.

9. The dispenser of claim 1 wherein the internal volume of the container is in the range from about 100 cubic centimeters to about 500 liters.

10. The dispenser of claim 2 wherein the internal volume of the inner chamber is in the range from about 100 cubic centimeters to about 500 liters, and the internal volume of the outer chamber is in the range from about 200 cubic centimeters to about 1500 liters.

11. The dispenser of claim 1 wherein the pressure release membrane is adapted to rupture at a pressure in the range from about 2 to about 35 atmospheres.

12. The dispenser of claim 2 wherein the inner pressure release membrane is adapted to rupture at a pressure in the range from about 2 to about 35 atmospheres, and the outer pressure release membrane is adapted to rupture at a pressure in the range from about 2 to about 35 atmospheres.

13. The dispenser of claim 1 wherein the catalytic probe comprises Ag, Mn, Pd, Pt, Rh, or a combination of two or more thereof.

14. The dispenser of claim 1 wherein the catalytic probe comprises silver or a silver based alloy.