C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 409/24 (2006.01) C07C 407/00 (2006.01)
Patent
CA 2176155
This invention relates to percarboxylic acid solutions, in particular aqueous equilibrium percarboxylic acid solutions, with improved stability in contact with stainless steel and to a process for the production thereof. Percarboxylic acid solutions according to the invention contain a percarboxylic acid having 1 to 12 C atoms and one or two peroxycarboxyl groups and are characterised by a content of polyphosphoric acid of the formula H n+2P n O3n+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.
Taubl Peter
Thiele Georg
Evonik Degussa Gmbh
Marks & Clerk
LandOfFree
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