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Process for manufacturing aqueous compositions comprising peracids

  • US 5,879,584 A
  • Filed: 06/13/1997
  • Issued: 03/09/1999
  • Est. Priority Date: 09/10/1994
  • Status: Expired due to Fees
First Claim
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1. A process for manufacturing an aqueous composition comprising a peracid, or mixture thereof, wherein said peracid is emulsified in a surfactant system comprising at least a hydrophilic surfactant having an HLB a bove 11, and a hydrophobic surfactant having an HLB below 11, said process comprising the steps of:

  • 1--preparing an aqueous peracid-comprising composition by a process which comprises the step of forming said peracid by reacting the corresponding anhydride with a solution of hydrogen peroxide comprising at least about 3 moles of said hydrogen peroxide per molar equivalent of said corresponding anhydride, wherein said corresponding anhydride is selected from anhydrides having the following formula;

    ##STR4## wherein R1 and R2 are linear or branched alkyl groups having of from 1 to about 20 carbon atoms, said anhydrides being symmetric anhydrides or asymmetric anhydrides;

    -- preparing a hydrophobic mixture which comprises at least said hydrophobic surfactant;

    3--preparing a hydrophilic mixture which comprises at least water and said hydrophilic surfactant;

    4--mixing the composition obtained in step 1 in said hydrophilic mixture if said corresponding anhydride used in step 1 is an anhydride having the following formula;

    ##STR5## wherein R1 and R2 are linear or branched alkyl groups having of from 1 to 4 carbon atoms, said anhydrides being symmetric anhydrides or asymmetric anhydrides or in said hydrophobic mixture if said corresponding anhydride used in step 1 is an anhydride having the following formula;

    ##STR6## wherein R1 and R2 are linear or branched alkyl groups having of from 5 to about 20 carbon atoms, said anhydrides being symmetric anhydrides or asymmetric anhydrides-- then mixing together said hydrophobic mixture and said hydrophilic mixture, and wherein steps 2 and 3 may be performed in any order.

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