Percarboxylic acid solutions with improved stability when in con

Details Percarboxylic acid solutions with improved stability when in con Percarboxylic acid solutions with improved stability when in con

1996-05-08

1998-06-16

Killos, Paul J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Percarboxylic acids or salts thereof

C07C40700, C07C40924

Patent

active

057673080

ABSTRACT:
Percarboxylic acid solutions, in particular aqueous equilibrium percarboxylic acid solutions, with improved stability when in contact with stainless steel and also a process for the production thereof. The percarboxylic acid solutions contain a percarboxylic acid having 1 to 12 C atoms and one or two peroxycarboxyl groups and are characterized by a content of polyphosphoric acid of the formula H.sub.n+2 P.sub.n O.sub.3n+1, in which n is greater than or equal to 2.3, in a quantity of 0.2 to 10 wt. %. These solutions are distinguished in comparison with known solutions by reduced corrosive action and reduced decomposition in the presence of stainless steel. The solutions are obtainable by reacting a carboxylic acid with hydrogen peroxide in the presence of polyphosphoric acid of the above-stated type and quantity as the catalyst.

REFERENCES:
patent: 2347434 (1944-04-01), Reichert et al.
patent: 3122417 (1964-02-01), Blaser
patent: 3168554 (1965-02-01), Phillips et al.
patent: 3442937 (1969-05-01), Sennewald et al.

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