Brevet : EP0769046 - COMPOSITIONS DE BLANCHIMENT

Titre

COMPOSITIONS DE BLANCHIMENT

N° et date de publication de la demande

EP0769046 - 23/04/1997

Type de la demande

A1

N° et date de dépôt

EP95923457.6 - 30/06/1995

N° et date de priorité

GB9413307 - 01/07/1994 ; GB9506046 - 24/03/1995

Famille de brevets

ES2121399T3 ; US5914304A ; EP0769046A1 ; DE69504515T2 ; AU2801295A ; ATE170554T1 ; DK0769046T3 ; WO9601310A1

Abrégé

PCT No. PCT/GB95/01536 Sec. 371 Date Apr. 25, 1997 Sec. 102(e) Date Apr. 25, 1997 PCT Filed Jun. 30, 1995 PCT Pub. No. WO96/01310 PCT Pub. Date Jan. 18, 1996Concentrate liquid peroxide compositions, especially bleaching and washing compositions of improved stability are produced in a process in which components incorporated into the liquid composition after blending of peroxide with components including a sequestering agent, are subjected to a presequestration stage. In the presequestration stage the further component is contacted with one or more sequestering agents, especially sequestrants which are capable of sequestering transition metal ions, especially a mixture in which one component is capable of sequestering cobalt and other components are not effective in sequestering cobalt. The invention is of particular value where the further component is a pH modifying solution, especially an alkali.