| US 7,550,420 B2 | ||
| Enzymatic production of peracids using perhydrolytic enzymes | ||
| Robert DiCosimo, Chadds Ford, Pa. (US); Mark Scott Payne, Wilmington, Del. (US); Eugenia Costa Hann, Carneys Point, N.J. (US); Vincent Brian Croud, Sheffield (United Kingdom); John Edward Gavagan, Wilmington, Del. (US); and Lorraine Winona Wagner, Newark, Del. (US) | ||
| Assigned to E. I. DuPont De Nemours and Company, Wilmington, Del. (US) | ||
| Filed on Oct. 27, 2006, as Appl. No. 11/588,523. | ||
| Application 11/588523 is a continuation in part of application No. 11/413246, filed on Apr. 28, 2006. | ||
| Claims priority of provisional application 60/676116, filed on Apr. 29, 2005. | ||
| Prior Publication US 2007/0042924 A1, Feb. 22, 2007 | ||
| Int. Cl. C11D 9/42 (2006.01); C11D 3/386 (2006.01); C11D 7/38 (2006.01); A01N 25/00 (2006.01); A61L 2/00 (2006.01) | ||
| U.S. Cl. 510—226 [422/28; 422/442; 424/94.2; 424/94.63; 424/405; 435/4; 435/264; 510/300; 510/302; 510/305; 510/306; 510/392] | 16 Claims |
| 1. A method for decontaminating or disinfecting a locus contaminated with one or more pathogens including an infective prion
or prion particle comprising
a) providing a set of peracid reaction components, said components comprising:
1) at least one substrate selected from the group consisting of:
i) esters having the structure
![]() wherein R1═C1 to C10 straight chain or branched chain alkyl optionally substituted with an hydroxyl or a C1 to C4 alkoxy group and R2═C1 to C10 straight chain or branched chain alkyl group, (CH2CH2—O)nH or (CH2CH(CH3)—O)nH and n=1 to 10;
ii) glycerides having the structure
![]() wherein R1═C1 to C10 straight chain or branched chain alkyl optionally substituted with an hydroxyl or a C1 to C4 alkoxy group and R3 and R4 are individually H or R1C(O); and
iii) amides having the structure:
![]() wherein R5 and R6═H or a C1 to C5 straight chain or branched alkyl group;
2) a source of peroxygen that provides a concentration of at least 500 mM hydrogen peroxide upon combining said reaction components;
3) at least one enzyme catalyst having perhydrolase activity, wherein said enzyme catalyst is selected from the group consisting
of lipases, proteases, and mixtures thereof; and
4) at least one prion-degrading protease wherein one or more of the prion-degrading proteases may be the same as the enzyme
catalyst providing the perhydrolase activity in (a)(3);
b) combining said reaction components at a pH of 2.5 to 7.5, whereby a concentrated peracid solution is produced having a
peracid concentration of at least 10 ppm within at least about 5 minutes to about 2 hours of combining said reaction components;
c) optionally diluting said peracid solution produced in step (b); and
d) contacting a locus contaminated with a microorganism, a virus, a prion or prion particle, or a combination thereof with
the aqueous peracid solution produced in step b) or step c) whereby said locus is disinfected and said prion particle is degraded.
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