Colorless monochloroacetic acid and the method of preparation thereof
AssigneePcc Mcaa Sp. Z O.O.
InventorsMarcin Bartman, Paulina Szczepaniak, Dominika Czachór, Katarzyna Komor
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Abstract
An improved method of producing monochloroacetic acid (MCAA) is disclosed, which affords a colorless monochloroacetic acid product in any form that can be obtained by this method.
Claims16
A method for producing a colorless monochloroacetic acid, comprising a crude monochloroacetic acid peroxidation step, wherein the peroxycarboxylic acid, is added to the crude monochloroacetic acid in liquid form in an amount of at least 50 ppm based on the weight of the crude monochloroacetic acid for a peroxidation reaction and the peroxidation reaction is carried out at a temperature of 20° C. to 100° C. until a colorless product with a color level below 100 units on Hazen scale is obtained, then, if necessary, cooled to room temperature, optionally added with water and packed, wherein a pure monochloroacetic acid in molten form or a water-diluted monochloroacetic acid with a concentration above 60 wt %, is used as crude monochloroacetic acid.
A colorless monochloroacetic acid, wherein it maintains a coloration of less than 60 units on Hazen scale for at least 7 days when stored at a temperature of not more than 70° C.
Dependencies are inferred from the claim text.