(19)
(11) EP 0 359 087 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.10.1991 Bulletin 1991/43

(43) Date of publication A2:
21.03.1990 Bulletin 1990/12

(21) Application number: 89116326.3

(22) Date of filing: 05.09.1989
(51) International Patent Classification (IPC)5: C11D 3/386, C11D 3/39
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 12.09.1988 US 243331

(71) Applicant: The Clorox Company
Oakland California 94612 (US)

(72) Inventors:
  • Stanislowski, Anna G.
    Walnut Creek California 94945 (US)
  • Heitfeld, Fred A.
    Castro Valley California 94546 (US)
  • Wiersema, Richard J.
    Tracy California 95376 (US)
  • Poulose, Ayrookaram J.
    San Bruno California 94066 (US)

(74) Representative: Meyer, Ludgerus A., Dipl.-Ing. 
Patentanwalt Jungfernstieg 38
D-20354 Hamburg
D-20354 Hamburg (DE)


(56) References cited: : 
   
       


    (54) Proteolytic perhydrolysis system and method of use for bleaching


    (57) A perhydrolysis system or activated oxidant system for in situ generation of peracid in aqueous solutions is disclosed, including: (a) a protease enzyme; (b) an ester substrate having the structure

    wherein R = C1-11-alkyl, R = C1-10-alkyl or H,

    Z = 0 or


    a polyalkoxy residue of the formula (CH2CH20)m or

    wherein m = 0-10,

    r=0 or 1;

    R and R optionally having OH-substituents pendant on or terminating the hydrocarbyl chains, and (c) a source of peroxygen capable of reacting with the protease (a) and the ester substrate (b) to result in proteolytic production of of peracid.





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