Production of peracids using an enzyme having perhydrolysis activity
AssigneeE. I. Du Pont de Nemours and Company
InventorsROBERT DICOSIMO, John E. Gavagan, Mark S. Payne, Frederick B. Cooling
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Abstract
A process is provided for producing peroxycarboxylic acids from carboxylic acid esters. More specifically, carboxylic acid esters are reacted with an inorganic peroxide, such as hydrogen peroxide, in the presence of an enzyme catalyst having perhydrolysis activity. The present perhydrolase catalysts are classified as members of the carbohydrate esterase family 7 (CE-7) based on the conserved structural features. Further, disinfectant formulations comprising the peracids produced by the processes described herein are provided.
Claims5
A process for producing a peroxycarboxylic acid comprising;
- a) providing a set of reaction components comprising:
- 1) at least one substrate selected from the group consisting of:
- i) esters having the structure
- [X]mR5
- wherein X=an ester group of the formula R6C(O)O
- R6═C1 to C7 linear, branched or cyclic hydrocarbyl moiety, optionally substituted with hydroxyl groups or C1 to C4 alkoxy groups, wherein R6 optionally comprises one or more ether linkages for R6=C2 to C7;
- R5=a C1 to C6 linear, branched, or cyclic hydrocarbyl moiety optionally substituted with hydroxyl groups;
- wherein each carbon atom in R5 individually comprises no more than one hydroxyl group or no more than one ester group;
- wherein R5 optionally comprises one or more ether linkages;
- m=1 to the number of carbon atoms in R5;
- and
- wherein said esters have a solubility in water of at least 5 ppm at 25° C.;
- ii) glycerides having the structure
- wherein R1=C1 to C7 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) acetylated saccharides selected from the group consisting of acetylated monosaccharides, acetylated disaccharides, and acetylated polysaccharides;
- 2) a source of peroxygen;
- and
- 3) an enzyme catalyst having perhydrolysis activity, wherein said enzyme catalyst comprises an enzyme having a CE-7 signature motif that aligns with a reference sequence SEQ ID NO:
- 2 using CLUSTALW, said signature motif comprising:
- i) an RGQ motif at amino acid positions 118-120 of SEQ ID NO:2;
- ii) a GXSQG motif at amino acid positions 179-183 of SEQ ID NO:2;
- and
- iii) an HE motif at amino acid positions 298-299 of SEQ ID NO:2;
- and
- wherein said enzyme comprises at least 30% amino acid identity to SEQ ID NO:
- 2;
- and
- b) combining said reaction components under suitable aqueous reaction conditions whereby a peroxycarboxylic acid is produced.
Dependencies are inferred from the claim text.