Proteolytic perhydrolysis system and method of use for bleaching
AssigneeThe Clorox Company
InventorsAnna G. Stanislowski, Fred A. Heitfeld, Richard J. Wiersema, Ayyookaran J. Poulose
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Abstract
A perhydrolysis system or activated oxidant system for in situ generation of peracid in aqueous solutions is disclosed including a protease enzyme, a source of hydrogen peroxide and an ester substrate having the general structure ##STR1## where R and R' are alkyl groups unsubstituted or substituted with at least one functional group. Preferred substrates are defined which are preferably chemically non-perhydrolyzable. Processes for bleaching and peracid production are also disclosed.
Claims4
A method of improving the in situ production of peracid by proteolytic perhydrolysis from an aqueous medium containing a combination of an effective amount of a source of hydrogen peroxide and a substrate having the structure:
- ##STR11## wherein R'=C.sub.1-10 alkyl;
- Z=0, (CH.sub.2 CH.sub.2O).sub.m --, ##STR12## NH, SO.sub.2 or NR" (wherein m=0-10 and R"=phenyl or C.sub.1-4 alkyl);
- n=0-10;
- X.dbd.H, OH, --OR" or NR".sub.2 ;
- and X may be pendent on or terminate the hydrocarbon chain;
- wherein the improvement comprises the addition of a non-stoichiometric amount of protease enzyme, said protease acting to catalyze the production of peracid enzymatically.
An improved activated oxidant system for in situ generation of peracid by proteolytic perhydrolysis comprising an aqueous medium containing a combination of an effective amount of a source of hydrogen peroxide and a substrate having the structure:
- ##STR13## wherein R'=C.sub.1-10 alkyl;
- Z=0, (CH.sub.2 CH.sub.2O).sub.m --, ##STR14## NH, SO.sub.2 or NR" (wherein m=0-10 and R"=phenyl or C.sub.1-4 alkyl);
- n=0-10;
- X.dbd.H, OH, --OR" or NR".sub.2 ;
- and X may be pendent on or terminate the hydrocarbon chain;
- wherein the improvement comprises the addition of a non-stoichiometric amount of protease enzyme, said protease acting to catalyze the production of peracid enzymatically.
Dependencies are inferred from the claim text.