(19)
(11) EP 0 402 981 A3

(12) EUROPEAN PATENT APPLICATION

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

(43) Date of publication A2:
19.12.1990 Bulletin 1990/51

(21) Application number: 90201428.1

(22) Date of filing: 05.06.1990
(51) International Patent Classification (IPC)5: C11D 1/72, C11D 3/43, C11D 3/18, B01D 61/14
(84) Designated Contracting States:
BE CH DE DK ES FR GB IT LI NL SE

(30) Priority: 16.06.1989 GB 8913881

(71) Applicants:
  • UNILEVER N.V.
    NL-3013 AL Rotterdam (NL)

    BE CH DE DK ES FR IT LI NL SE 
  • UNILEVER PLC
    London EC4P 4BQ (GB)

    GB 

(72) Inventors:
  • van Amerongen, Jacob
    NL-3723 PK Bilthoven (NL)
  • van der Linden, Arie
    NL-3667 CM Maarssen (NL)

(74) Representative: Kan, Jacob Hendrik, Dr. et al
Unilever N.V. Patent Division P.O. Box 137
NL-3130 AC Vlaardingen
NL-3130 AC Vlaardingen (NL)


(56) References cited: : 
   
       


    (54) Heavy duty washing process


    (57) A heavy duty process for laundering greasy stains from a fabric which comprises treating the fabric with an aqueous detergent composition comprising (a) 0.5 - 5 % by weight of a nonionic surfactant and (b) 1 - 10 % by weight of an apolar solvent in a ratio from less than 1 : 1 to 1 : 10. Preferably, the hot wash liquor is treated in a filtering step using microfilters to separate the organic solvent phase from the aqueous phase, which is then recycled.





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