Formulations for the decontamination of toxic chemicals
A decontaminant composition comprising a peroxide; an organic co-solvent; an amine, which in reaction with the peroxide is a source of a perhydrolysis species; a phase transfer catalyst comprising at least one quaternary ammonium compound; a metal oxide catalyst; a chemical base; and at least one pH buffering compound.
1. A decontaminant composition for the decontamination of a surface or an area by destroying or neutralizing chemical toxants by perhydrolysis and catalytic oxidation, said decontaminant composition comprising:
reactive species for destroying the chemical toxants by reaction therewith;
a pH buffer system for maintaining a pH of said decontaminant composition within a predetermined range during the decontamination;
solubilization ingredients for solubilizing the chemical toxants;
a metal oxide catalyst; and
de-ionized water;
wherein said pH buffer system comprises:
hydrogen peroxide;
a phase transfer catalyst comprising at least one quaternary ammonium compound base; and
a weak base aliphatic amine; and
wherein said solubilization ingredients comprise:
an organic co-solvent,
a quaternary ammonium compound surfactant, and
said weak base aliphatic amine; and
wherein said reactive species comprise:
a perhydrolysis species formed in reaction of said hydrogen peroxide with said weak base aliphatic amine; and
a catalytic oxidative species formed in reaction of said hydrogen peroxide with said metal oxide catalyst.
2. The decontaminant composition of claim 1 wherein
said quaternary ammonium compound surfactant is hexadecyltrimethylammonium bromide; said weak base aliphatic amine is N-benzylamine; said pH buffer system further contains phase transfer catalyst tetrabutylammonium hydroxide; and said pH buffer system further contains a chemical base selected from sodium hydroxide and ammonium hydroxide; and wherein said predetermined range is about 9 to about 10.
3. The decontaminant composition of claim 2 wherein said metal oxide catalyst is alkali metal molybdate or tungstate.
4. The decontaminant composition of claim 2 wherein
said organic co-solvent comprises propylene glycol n-propyl ether.
5. The decontaminant composition of claim 4 comprising:
from approximately 8% to approximately 20% hydrogen peroxide;
from approximately 10% to approximately 30% propylene glycol n-propyl ether;
from approximately 0.05 M to approximately 1.0 M N-benzylamine;
from approximately 0.25% to approximately 7% hexadecyltrimethylammonium bromide;
from approximately 0.01 M to approximately 0.45 M tetrabutylammonium hydroxide;
from approximately 0.1 mM to approximately 10 mM MoO 4 = ; and
from approximately 0.05 M to approximately 0.45 M sodium hydroxide.
6. The decontaminant composition of claim 5 comprising:
from 0.25 M to 0.80 M N-benzylamine;
from 1.00% to 2.0% hexadecyltrimethylammonium bromide;
from 0.05 M to 0.15 M tetrabutylammonium hydroxide;
from 0.5 mM to 5.0 mM MoO 4 = ; and
from 0.09 M to 0.15 M sodium hydroxide.
7. The decontaminant composition of claim 6 comprising:
15% hydrogen peroxide;
20% propylene glycol n-propyl ether;
0.436 M N-benzylamine;
1.50% hexadecyltrimethylammonium bromide;
0.127 M tetrabutylammonium hydroxide;
from 1 mM to 4 mM MoO 4 = ; and
0.111 M sodium hydroxide.
8. The decontaminant composition of claim 7 comprising 1 mM MoO 4 32 .
9. The decontaminant composition of claim 7 comprising 2 mM MoO 4 32 .
10. The decontaminant composition of claim 7 comprising 4 mM MoO 4 32 .
11. The decontaminant composition of claim 2 wherein said hydrogen peroxide is stabilized by 0.1 mM to 20 mM of a phosphonate detergent.
12. The decontaminant composition of claim 2 said decontaminant composition is prepared within 2 hours prior to its use at a temperature of about 30 degrees C.
13. The decontaminant composition of claim 2 wherein said decontaminant composition is prepared within 24 hours prior to its use at a temperature of about 0 degrees C.
14. The decontaminant composition of claim 2 wherein said decontaminant composition is prepared within 6 hours prior to its use at a temperature of about 20 degrees C.
15. A method of decontaminating hazardous chemicals on a surface, comprising applying the decontaminant composition of claim 1 onto said surface.
16. The method of claim 15 further comprising applying said decontaminant composition by at least one of electrostatic spraying, pressure spraying, pouring, or spreading with an applicator.
17. The method of claim 15 further comprising leaving said decontaminant composition on said surface for at least five minutes.
18. The decontaminant composition of claim 1 further comprising a minor amount of stabilizer.
19. A shelf-stable decontaminant composition for the decontamination of a surface or an area by destroying or neutralizing chemical toxants by perhydrolysis and catalytic oxidation, said composition comprising a first part and a second part that are mixed together so that said composition resulting from the mixture has a pH in the range of about 9 to about 10 and comprises reactive species, a pH buffer system, and solubilization ingredients,
said first part comprising:
stabilized hydrogen peroxide; and
an organic co-solvent;
said second part comprising:
a weak base aliphatic amine;
a phase transfer catalyst, said phase transfer catalyst comprising at least one quaternary ammonium compound;
a metal oxide catalyst; and
de-ionized water;
wherein said pH buffer system comprises said hydrogen peroxide, said weak base aliphatic amine, and said phase transfer catalyst;
wherein said solubilization ingredients comprise said organic co-solvent, said quaternary ammonium compound, and said weak base aliphatic amine; and
wherein said reactive species comprise a perhydrolysis species formed in reaction of said hydrogen peroxide with said weak base aliphatic amine, and a catalytic oxidative species formed in reaction of said hydrogen peroxide of the first part with said metal oxide catalyst.
20. The shelf-stable decontaminant composition of claim 19 wherein said hydrogen peroxide is stabilized by 0.1 mM to 20 mM of a phosphonate detergent.
21. The shelf-stable decontaminant composition of claim 19 wherein at least one of said first part and said second part is in the form of a concentrate.
22. The shelf-stable decontaminant composition of claim 19 , wherein said first part and said second part are combined for use as a decontaminant no more than 6 hours before use at a temperature of about 20 degrees C. and no more than 24 hours before use at a temperature of about 0 degrees C.
23. The shelf-stable decontaminant composition of claim 19 that results from mixing said two parts comprising:
about 15% hydrogen peroxide;
about 4 mM phosphonate detergent;
about 20% propylene glycol n-propyl ether;
about 0.44 M N-benzylamine;
about 1.50% hexadecyltrimethylammonium bromide;
about 0.13 M tetrabutylammonium hydroxide;
from about 1 mM to about 4 mM MoO 4 = ;
about 0.1 M sodium hydroxide; and
a balance of de-ionized water.