Process for cleaning filters

Details Process for cleaning filters Process for cleaning filters

C - Chemistry, Metallurgy

11

D

C11D 11/00 (2006.01) C11D 3/28 (2006.01) C11D 3/39 (2006.01) C11D 7/26 (2006.01) C11D 7/32 (2006.01)

Patent

CA 2474023

Filters used in the food and beverage industry can be cleaned by contacting the filters with a cyclic nitroxyl compound and a reoxidator or with a nitroxonium compound in a bromine-free process. The nitroxyl can be TEMPO or its 4-acetamido or 4-acetoxy derivative, and the nitroxonium compound can be the corresponding oxidised ion obtained by enzymatic or metal catalysed oxidation. The reoxidator may be a peracid, such as peracetic acid, persulphuric acid or permanganic acid, or a metal complex with a hydroperoxide.

Cette invention concerne un procédé de des filtres utilisés dans l'industrie des aliments et des boissons, consistant à mettre lesdits filtres en contact avec un composé nitroxyle cyclique et un ré-oxydant ou avec un composé nitroxonium en l'absence de brome. Le nitroxyle peut être du 2.2.6.6-tétraméthylpipéridine-1-oxyl (TEMPO) ou son dérivé 4-acétamido ou 4-acétoxy, et le composé nitroxonium peut être l'ion correspondant oxydé obtenu par oxydation enzymatique ou oxydation catalysée d'un métal. Le ré-oxydant peut être un peracide, tel qu'un acide peracétique, un acide persulfurique ou un acide permanganique, ou bien un complexe métallique avec un hydroperoxyde.

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