Decolorization of polysuccinimide

Details Decolorization of polysuccinimide Decolorization of polysuccinimide

C - Chemistry, Metallurgy

08

G

C08G 73/10 (2006.01) C08G 69/46 (2006.01) C08G 69/48 (2006.01)

Patent

CA 2208756

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.

L'invention concerne un procédé de décoloration de polysuccinimide par mise en contact du polysuccinimide à l'état solide avec une solution aqueuse de décoloration. On place le polysuccinimide dans une solution de peroxyde d'hydrogène afin d'obtenir une pâte liquide contenant des particules solides, ce qui atténue considérablement la couleur du polysuccinimide. La séparation de la solution de décoloration s'effectue facilement au moyen, par exemple, d'une filtration séparant les solides du liquide, ce qui permet d'introduire le polysuccinimide directement dans des formulations détergentes.

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