Decolorization of polysuccinimide
AssigneeMonsanto Company
InventorDavid A. Martin
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Abstract
There is disclosed a process for decolorizing polysuccinimide by means of contacting the polysuccinimide in the solid state with an aqueous solution of a bleach. Typically, polysuccinimide is placed into a solution of hydrogen peroxide to form a slurry with solid particles whereby the color of the polysuccinimide is greatly reduced. Separation of the bleach solution is performed easily by means of solid liquid separation such as by filtration rendering the polysuccinimide acceptable for use directly into detergent formulations.
Claims8
A process for increasing the whiteness of particulate polysuccinimide prepared by the thermal condensation of L-aspartic acid which comprises forming a slurry of said particles in an aqueous bleach solution for a period of time sufficient to increase the whiteness of said particles, then separating said particles from said solution.
Dependencies are inferred from the claim text.