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    • 10. 发明申请
    • PEROXYCARBOXYLIC ACIDS
    • 过氧羧酸
    • WO9211238A3
    • 1992-08-06
    • PCT/GB9102280
    • 1991-12-19
    • INTEROX CHEMICALS LTD
    • JAMES ALUN PRYCEHARRISON PAUL RICHARDCARR GRAHAM
    • C07C409/24C07D209/48C11D3/39C11D3/395C11D7/54D06L3/02
    • C07D209/48C11D3/3945
    • 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.