C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 209/48 (2006.01) C07C 409/24 (2006.01) C11D 3/39 (2006.01) C11D 3/395 (2006.01)
Patent
CA 2099009
2099009 9211238 PCTABS00014 Many percarboxylic acids demonstrate effective disinfection and bleaching properties, especially at hand-hot temperatures, but their use in household formulations is precluded by virtue of their adverse physico-chemical properties, such as a propensity to decompose too quickly during storage or to explode on impact or when subjected to pressure. The invention provides a selection of organic percarboxylic acids which are not only stable and safe, but show especially effective bleach properties. They satisfy general formula (I), in which X represents hydrogen or optionally a compatible non-released substituent, Y represents a group of formula (CH2)zH, x, y and z are either 0, 1 or 2, and x + y + z = 1 or 2, and Ph represents a phenyl substituent, optionally substituted by a compatible non-released substituent. In a preferred peroxyacid, X=H, x=0, y=1, z=0 and Ph is unsubstituted. The invention also provides bleaching, washing and disinfecting compositions containing such peracids and processes using them for such purposes. The invention further provides a process for making peroxyacids in a sulphuric acid reaction medium in which in step 1, a medium having a preselected acidity is formed by mixing sulphuric acid with aqueous hydrogen peroxide, in step 2, a solution of carboxylic acid in concentrated sulphuric acid is formed and in step 3, the product of step 2 is introduced progressively into the sulphuric acid reaction medium and an aqueous diluent is separately introduced into the medium in order to maintain the acidity of the mixture substantially constant.
Carr Graham
Harrison Paul R.
James Alun P.
Riches Mckenzie & Herbert Llp
Solvay Interox Limited
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