Enzymatic production of peracids using perhydrolytic enzymes
View Patent ↗A process is provided to produce a concentrated aqueous peracid solution in situ using at least one enzyme having perhydrolase activity in the presence of hydrogen peroxide (at a concentration of at least 500 mM) under neutral to acidic reaction conditions from suitable carboxylic acid esters (including glycerides) and/or amides substrates. The concentrated peracid solution produced is sufficient for use in a variety of disinfection and/or bleaching applications.
1. A process for producing a concentrated aqueous peracid solution 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 R 1 =C1 to C10 straight chain or branched chain alkyl optionally substituted with an hydroxyl or a C1 to C4 alkoxy group and R 2 =C1 to C10 straight chain or branched chain alkyl group, (CH 2 CH 2 —O) n H or (CH 2 CH(CH 3 )—O) n H and n=1 to 10;
ii) glycerides having the structure
wherein R 1 =C1 to C10 straight chain or branched chain alkyl optionally substituted with an hydroxyl or a C1 to C4 alkoxy group and R 3 and R 4 are individually H or R 1 C(O); and
iii) amides having the structure
wherein R 5 and R 6 are individually H, acetyl, 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; and
3) at least one enzyme catalyst having perhydrolase activity, wherein said enzyme catalyst is selected from the group consisting of lipases, esterases, proteases, and mixtures thereof; and
b) combining said reaction components at a pH of about 2.5 to about 7.5, whereby a concentrated peracid solution is produced within at least about 5 minutes to about 2 hours after combining said reaction components.
2. The process of claim 1 wherein the pH is 3 to 7.
3. The process of claim 2 wherein the pH is 4 to 6.5.
4. The process of claim 1 wherein the concentrated peracid solution has a peracid concentration of at least 10 ppm.
5. The process of claim 4 wherein the peracid concentration is at least 100 ppm.
6. The process of claim 5 wherein the peracid concentration is at least 500 ppm.
7. The process of claim 6 wherein the peracid concentration is at least 1000 ppm.
8. The process of claim 7 wherein the peracid concentration is at least 5000 ppm.
9. The process of claim 1 wherein the reaction components comprise at least one lipase and at least one substrate selected from the group consisting of esters, glycerides, and mixtures thereof.
10. The process of claim 1 or claim 9 wherein said at least one substrate is an ester substrate selected from the group consisting of methyl lactate, ethyl lactate, methyl glycolate, ethyl glycolate, methyl methoxyacetate, ethyl methoxyacetate, methyl 3-hydroxybutyrate, ethyl 3-hydroxybutyrate, and mixtures thereof.
11. The process of claim 1 or claim 9 wherein the said at least one substrate is a glyceride substrate selected from the group consisting of monoacetin, diacetin, triacetin, monobutyrin, dibutyrin, tributyrin, glyceryl monooctanoate, glyceryl dioctanoate, glyceryl trioctanoate, and mixtures thereof.
12. The process of claim 11 wherein said glyceride substrate is selected from the group consisting of monoacetin, diacetin, triacetin, and mixtures thereof.
13. The process of claim 1 wherein said at least one enzyme catalyst is at least one lipase produced by an organism selected from the genera Aspergillus, Rhizopus, Penicillium, Candida, Pseudomonas, Mucor, Thermomyces, Alcaligenes , and Sus.
14. The process of claim 13 wherein said at least one lipase is produced by an organism selected from the group consisting of Aspergillus sp., Aspergillus niger, Rhizopus sp., Rhizopus oryzae, Penicillium sp. I, Penicillium sp. II, Candida sp., Candida rugosa, Candida antartia, Pseudomonas sp., Pseudomonas cepacia, Pseudomonas fluorescens, Thermomyces lanuginosus, Mucor sp., and Mucor miehei , and Alcaligenes sp.
15. The process of claim 14 wherein said at least one lipase is selected from the group consisting of Aspergillus sp. lipase, Aspergillus niger lipase, Rhizopus sp. lipase, Rhizopus oryzae lipase, Penicillium sp.I lipase, Penicillium sp. II lipase, Candida sp.lipase, Candida rugosa lipase, Candida antartic lipase A, Candida antartica lipase B, Pseudomonas sp. lipase, Pseudomonas cepacia lipase, Pseudomonas fluorescens lipase, Thermomyces lanuginosus lipase, Mucor sp. lipase, Mucor miehei lipase, Alcaligenes sp. lipase, Sus sp. lipase, and mixtures thereof.
16. The process of claim 15 wherein said at least one lipase is selected from the group consisting of BioCatalytics ICR-101 Aspergillus sp. lipase, BioCatalytics ICR-102 Rhizopus sp. lipase, BioCatalytics ICR-103 Rhizopus oryzae lipase, BioCatalytics ICR-104 Penicillium sp. I lipase, BioCatalytics ICR-105 Penicillium sp. II lipase, BioCatalytics ICR-106 Candida rugosa lipase, BioCatalytics ICR-107 Pseudomonas cepacia lipase, BioCatalytics ICR-108 Pseudomonas sp. lipase, BioCatalytics ICR-109 Pseudomonas fluorescens lipase, BioCatalytics ICR-110 Candida antartica lipase B, BioCatalytics ICR-111 Candida sp. lipase, BioCatalytics ICR-112 Candida antartica lipase A, BioCatalytics ICR-113 Pseudomonas sp. lipase, BioCatalytics ICR-114 porcine pancreas lipase, BioCatalytics ICR-115 Thermomyces languinosus lipase, BioCatalytics ICR-116 Mucor miehei lipase, BioCatalytics ICR-117 Alcaligenes sp. lipase, BioCatalytics IMB-111 immobilized Candida antartica lipase B, Amano Lipase AY 30 Candida rugosa lipase, Amano Lipase R Penicillium roqueforti lipase, Amano Lipase F-AP15 Rhizopus oryzae lipase, Amano Lipase M 10 Mucor javanicus lipase, Amano Lipase A 12 Aspergillus niger lipase, Amano Lipase G 50 Penicillium camembertii lipase, Amano F-DS Rhizopus oryzae lipase, Amano DS Aspergillus niger lipase, Novozym CALB L Candida antartica lipase B, Novozym 435 immobilized Candida antartica lipase B, and Novozym Palatase 20000L Aspergillus oryzae lipase, Lipozyme TL Thermomyces lanuginosus lipase, Chirazyme L2 Candida antartica lipase B, Validase AN Aspergillus niger lipase, Dietrenz CR Candida rugosa lipase, Enzeco MLC Aspergillus niger lipase, and mixtures thereof.
17. The process of claim 15 wherein said lipase is selected from the group consisting of Candida antartica lipase B and Aspergillus niger lipase.
18. The process of claim 1 wherein said at least one enzyme catalyst is at least one protease.
19. The process of claim 18 wherein said at least one substrate is selected from the group of esters, glycerides, and mixtures thereof.
20. The process of claim 19 wherein said substrate is an ester substrate selected from the group consisting of methyl lactate, ethyl lactate, methyl glycolate, ethyl glycolate, methyl methoxyacetate, ethyl methoxyacetate, methyl 3-hydroxybutyrate, ethyl 3-hydroxybutyrate, and mixtures thereof.
21. The process of claim 19 wherein said substrate is a glyceride substrate selected from the group consisting of monoacetin, diacetin, triacetin, monobutyrin, dibutyrin, tributyrin, glyceryl monooctanoate, glyceryl dioctanoate, glyceryl trioctanoate, and mixtures thereof.
22. The process of claim 21 wherein the glyceride substrate is selected from the group consisting of monoacetin, diacetin, triacetin, and mixtures thereof.
23. The process of claim 18 wherein said at least one substrate is an amide selected from the group consisting of acetamide, diacetamide, and mixtures of acetamide and diacetamide.
24. The process of claim 18 wherein said at least one protease is produced by an organism selected from the genera Aspergillus, Rhizopus, Bacillus, Carica, Ananas, Streptomyces, Tritirachium , and Sus.
25. The process of claim 24 wherein said protease is produced from an organism selected from the group consisting of Aspergillus saitoi, Rhizopus sp., Bacillus sp., Bacillus subtilis, Sus scrofa, Carica papaya, Ananas comosus, Streptomyces griseus , and Tritirachium album.
26. The process of claim 25 wherein said protease is selected from the group consisting of Aspergillus saitoi protease type XIII, Rhizopus sp. protease type XVIII, Bacillus sp. protease, Sus scrofa pepsin, Carica papaya Chymopapain, Carica papaya papain, Ananas comosus bromelain, Streptomyces griseus Pronase, Tritirachium album Proteinase K, and mixtures thereof.
27. The process of claim 26 wherein said protease is selected from the group consisting of Streptomyces griseus Pronase, Tritirachium album Proteinase K, and mixtures thereof.
28. The process of claim 18 wherein said at least one protease has prion-degrading activity and perhydrolase activity
29. The process of claim 1 wherein the reaction components comprise at least one lipase and at least one prion-degrading protease.
30. The process of claim 29 wherein the prion-degrading protease is selected from the group consisting of Proteinase K, Pronase, and mixtures thereof.
31. The process of claim 1 wherein the peracid produced is selected from the group consisting of peracetic acid, perbutyric acid, perlactic acid, perglycolic acid, permethoxyacetic acid, per-β-hydroxybutyric acid, peroctanoic acid, and mixtures thereof.
32. The process of claim 31 wherein the peracid is peracetic acid.