Neutralization of vesicants and related compounds
View Patent ↗A process for the destruction of vesicants, nerve agents, and related chemical compounds is described. Blister-type chemical agents such as lewisite and mustards, as well as G or V Class nerve agents and phosphorus-containing pesticides, are reacted with a neutralent solution of a persulfate, preferably potassium peroxymonosulfate, and a peroxide, preferably hydrogen peroxide, at temperatures ranging from ambient to boiling for a time sufficient to reduce the residual agent concentration to levels acceptable for disposal in a routine manner.
1. A process for the destruction of chemical agents selected from the group consisting of vesicants, nerve agents, and phosphorus-containing pesticides comprising contacting the chemical agent with an aqueous neutralent solution that contains effective amounts of hydrogen peroxide and more than 5% by weight of the triple salt KHSO 5 .KHSO 4 .K 2 SO 4 for a time sufficient to reduce the concentration of chemical agent in the reaction product to level below 50 mg/I.
2. The process of claim 1 wherein said neutralent solution contains from 10% to 25% by weight of said triple salt, from 10% to 25% by weight of hydrogen peroxide, and up to 60% by weight of water.
3. The process of claim 2 wherein said neutralent solution contains a water-soluble, co-solvent in an amount up to 15% of the neutralent solution by volume.
4. The process of claim 3 wherein said co-solvent is 2-propanol.
5. The process of claim 3 wherein said co-solvent is 1-methyl-2-pyrrolodinone.
6. The process of claim 2 wherein the agent:neutralent volume ratio is in the range of a out 1:10 to 1:50.
7. The process of claim 6 wherein paid reaction is conducted at a temperature ranging from ambient to the boiling point of the neutralent solution for a time ranging from 2 to 10 hours.
8. The process of claim 7 wherein said chemical agent is a G or V Class nerve agent.
9. The process of claim 7 wherein said chemical agent is a phosphorus-containing pesticide.
10. The process of claim 7 wherein said chemical agent is a vesicant that is selected from the group consisting of lewisite, mustard agents, and mixtures thereof, and wherein said neutralent solution contains approximately equal amounts of said triple salt and hydrogen peroxide.
11. The process of claim 10 wherein said reaction temperature is in the range of about 40° to about 90° C. and the reaction time is in the range of about 3 to 6 hours.
12. The process of claim 10 wherein said neutralent solution contains about 17.5 wt % of said triple salt and about 17.5 wt % hydrogen peroxide and wherein said agent:neutralent volume ration is about 1:50.