Process for increasing the bleaching efficiency of an inorganic persalt or of hydrogen peroxide
AssigneeAusimont S.p.A.
InventorsFulvio Burzio, Roland Beck, Myriam Elsevier, Julio Mentech
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Abstract
A process for increasing the bleaching efficiency of an inorganic persalt or hydrogen peroxide by adding to said persalt or H.sub.2 O.sub.2 an activating agent. The activating agent is an acetylated gluconic acid derivative, such as N-methyl-N-acetyl pentaacetyl gluconamide, N-methyl-N-acetyl pentaacetyl gluconamide or tetraacetyl gluconolactone. The invention also relates to the acetylated gluconic acid derivatives themselves.
Claims8
A process for increasing the bleaching efficiency of an inorganic persalt or hydrogen peroxide, said process comprising adding an activating agent to said inorganic persalt or hydrogen peroxide in an amount such that the molar ratio of the activating agent to the persalt or hydrogen peroxide is from 10:90 to 50:50, said activating agent having the formula:
- ##STR4## wherein R.sup.2 and R.sup.3 are the same or different, and are selected from the group consisting of H, alkyl having from 1 to 5 carbon atoms, alkylcarbonyl having from 1 to 3 carbon atoms, hydroxyalkyl having from 1 to 5 carbon atoms, and carboxyalkyl having from 1 to 5 carbon atoms and from 1 to 3 carboxyl groups, with the proviso that when R.sup.2 is H, R.sup.3 is different from H;
- R.sup.1 is H or alkylcarbonyl having from 1 to 3 carbon atoms;
- and R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are the same or different from each other, and are selected from the group consisting of H and ##STR5## with the proviso that at least one of R.sup.4, R.sup.5, R.sup.6 and R.sup.7 is ##STR6##
Dependencies are inferred from the claim text.