Dilution Process for Imidopercarboxylic Acids
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United States of America Patent
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Issued Date -
Sep 25, 2008
app pub date -
Mar 15, 2005
filing date -
Mar 16, 2004
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Abandoned
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Abstract
Process for obtaining dilute aqueous solutions containing an amount of <7% by weight, expressed as a percentage by weight of imidoalkanepercarboxylic acids, starting with concentrated aqueous compositions of the said peracids in the .beta. form, the said concentrated compositions being obtained from the imidoalkanepercarboxylic acids in the .alpha.-crystal form, the said process comprising the following steps: I) dilution of the concentrated aqueous composition of imidoalkanepercarboxylic acids (C) with an aqueous solution (D) having a pH of between 2 and 5, in a (C):(D) proportion, expressed in parts by weight, of between 0.1:10 and 10:0.2, working at temperatures of between 4.degree. C. and 30.degree. C.; II) application to the dilute aqueous composition obtained in I) of a shear force of at least 5000 s.sup.-1, until a constant dynamic viscosity is obtained; III) dilution of the dilute aqueous composition treated in II) to obtain an imidoalkanepercarboxylic acid concentration of <7% by weight; IV) optionally, final homogenization of the composition.
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