Decolorization of polysuccinimide

Details Decolorization of polysuccinimide Decolorization of polysuccinimide

1994-12-27

1996-03-05

Dodson, Shelley A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

525420, 528310, 528322, 528328, 528363, 528480, 528483, C08G 6910

Patent

active

054969220

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.

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patent: 5292864 (1994-03-01), Wood et al.
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patent: 5319145 (1994-06-01), Paik et al.
"Temperature Effect on the Molecular Weight and the Optical Purity of Anhydropolyaspartic Acid Prepared by Thermal Polycondensation", Bulletin of the Chemical Society of Japan, vol. 51 (5), 1555-1556 (1978), Kokufuta et al.

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