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US 2007/0184999 A1Published application
Enzymatic production of peracids using lactobacilli having perhydrolysis activity
AssigneeE. I. Du Pont de Nemours and Company
InventorsRobert Dicosimo, L. Wagner
Life of this patent
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Abstract
A method is provided for producing peroxycarboxylic acids from carboxylic acid esters. More specifically, carboxylic acid esters are reacted in situ with an inorganic peroxide such as hydrogen peroxide in the presence of a perhydrolase catalyst derived from a Lactobacillus sp. to produce peroxycarboxylic acids.
Claims25
A process for producing peroxycarboxylic acid from carboxylic acid ester substrates comprising
- a) providing a set of peracid reaction components, said components comprising:
- i) a carboxylic acid ester 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;
- and
- 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
- 2) a source of peroxygen;
- and
- 3) at least one Lactobacillus sp. derived-catalyst having a perhydrolysis activity;
- and
- b) combining said reaction components under suitable aqueous reaction conditions, wherein said conditions comprise a pH range of about 2 to about 9, whereby a peroxycarboxylic acid is produced at a concentration of at least 500 ppb within about 5 minutes to about 2 hours of combining the reaction components.
10 more elements
A process to reduce a microbial population on a hard surface or inanimate object using an enzymatically produced aqueous peracid composition, said process comprising:
- a) providing a set of peracid reaction components, said components comprising:
- 1. a 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;
- and
- 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
- 2) a source of peroxygen;
- and
- 3) at least one Lactobacillus sp. derived-catalyst having a perhydrolysis activity;
- b) providing a hard surface or an inanimate object having a concentration of microorganisms and/or viruses;
- c) combining said reaction components under suitable aqueous reaction conditions, wherein said conditions comprising a pH range of about 2 to about 9, whereby a peracid product is formed having a peracid concentration of at least 1.5 ppm within about 5 minutes to about 2 hours of combining the reaction components;
- d) optionally diluting the said peracid product;
- and
- e) contacting said hard surface or said inanimate object with the peracid produced in step c) or step d) within about 48 hours of combining said reaction components whereby said the concentration of said of microorganisms is reduced at least 3-log.
13 more elements
Dependencies are inferred from the claim text.