# US 5,345,033 A · Method for the neutralization of hazardous materials

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- Number: US 5,345,033 A
- Document ID: US5345033A
- Status: Granted
- Kind: A
- Application number: 07/995,802
- Filed: 1992-12-23
- Granted: 1994-09-06
- Earliest claimed: 1992-12-23
- Assignees: Toxco, Inc.
- Inventors: William J. McLaughlin
- Web page: https://patentgrep.com/patent/US5345033A

## CPC

- A62D 3/30: by reacting with chemical agents
- A62D 3/00: Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances (consuming noxious gases by combustion F23G7/06)
- A62D 2101/06: Explosives, propellants or pyrotechnics, e.g. rocket fuel or napalm
- A62D 2101/43: containing heavy metals, in the bonded or free state
- A62D: CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS

## Abstract

A method for neutralizing hazardous materials wherein the material and if applicable, the device within which such material is contained, is first cooled to substantially sub-ambient temperatures. The material is then safely extractable from such device and exposed to the appropriate reactants in order to form benign products. Most of the hazards associated with accessing, handling, and reacting these materials are thereby eliminated and such is achieved in relatively economical manner.

## Claims

### Claim 1

A method for neutralizing a hazardous material, comprising the steps of:
cooling said hazardous material to substantially below room temperature; and
reacting said cooled material with one or more reagents selected to yield non-hazardous or less hazardous products.

### Claim 2 (depends on 1)

The method of claim 1 wherein said hazardous material is cooled by contact with a cryogenic fluid.

### Claim 3 (depends on 2)

The method of claim 2 wherein said hazardous material is cooled by submersion in a cryogenic fluid.

### Claim 4 (depends on 3)

The method of claim 3 wherein said cryogenic fluid comprises a liquid argon.

### Claim 5 (depends on 3)

The method of claim 3 wherein said cryogenic fluid comprises liquid nitrogen.

### Claim 6

A method for neutralizing hazardous materials disposed within a containment vessel, comprising the steps of:
cooling said containment vessel to substantially below room temperature such that said hazardous material contained therein is similarly cooled to below room temperature;
opening said cooled vessel to expose said hazardous material; and
reacting said cooled material with one or more reagents selected to yield non-hazardous or less hazardous products.

### Claim 7 (depends on 6)

The method of claim 6 wherein said containment vessel is cooled by contact with a cryogenic fluid.

### Claim 8 (depends on 6)

The method of claim 6 wherein said containment vessel is cooled by submersion in a cryogenic fluid.

### Claim 9 (depends on 8)

The method of claim 8 wherein said cryogenic fluid comprises liquid argon.

### Claim 10 (depends on 8)

The method of claim 8 wherein said cryogenic fluid comprises liquid nitrogen.

### Claim 11

A method for neutralizing hazardous material contained within munitions, comprising the steps of:
cooling said munitions to substantially below room temperature such that said hazardous material contained therein is similarly cooled to substantially below room temperature;
mechanically shearing said munitions so as to expose said hazardous material; and
reacting said hazardous material with reagents selected to yield non-hazardous or less hazardous products.

### Claim 12 (depends on 11)

The method of claim 11 wherein said munitions are cooled by contact with a cryogenic fluid.

### Claim 13 (depends on 12)

The method of claim 12 wherein said munitions are cooled by submersion in a cryogenic fluid.

### Claim 14 (depends on 13)

The method of claim 13 wherein said cryogenic fluid comprises a liquid argon.

### Claim 15 (depends on 13)

The method of claim 13 wherein said cryogenic fluid comprises liquid nitrogen.

### Claim 16

A method of neutralizing lithium contained within a lithium boiler, comprising the steps of:
submersing said lithium boiler in liquid argon so as to cool said lithium contained therein to about -300.degree. F.;
shearing open said boiler to expose said lithium; and
reacting lithium with water to form lithium hydroxide.

### Claim 17 (depends on 16)

The method of claim 16 further comprising the step of chemically converting said lithium hydroxide to lithium carbonate.