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, III
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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.
Claims9
A process for producing a peroxycarboxylic acid comprising:
- a) providing a set of reaction components, said components comprising:
- 1) a substrate selected from the group consisting of:
- i) esters 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 R2=C1 to C10 straight chain or branched chain alkyl, alkenyl, alkynyl, aryl, alkylaryl, alkylheteroaryl, heteroaryl, (CH2CH2—O)nH or(CH2CH(CH3)—O)nH and n=1 to 10;
- 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 comprising an enzyme, wherein said enzyme has perhydrolase activity and comprises a signature motif that aligns with a reference sequence SEQ ID NO:
- 2 using CLUSTALW, said signature motif comprising:
- i) an RGQ motif at positions corresponding to positions 118-120 of SEQ ID NO:2;
- ii) a GXSQG motif at positions corresponding to positions 179-183 of SEQ ID NO:2;
- and
- iii) an HE motif at positions corresponding to positions 298-299 of SEQ ID NO:2;
- and
- b) combining said reaction components under suitable reaction conditions whereby a peroxycarboxylic acid is produced.
Dependencies are inferred from the claim text.