Process for the manufacture of anhydro polyamino acids and polyamino acids

  • US 5,057,597 A
  • Filed: 07/03/1990
  • Issued: 10/15/1991
  • Est. Priority Date: 07/03/1990
  • Status: Expired due to Term
First Claim
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1. A method for producing a anhydropolyamino acid in relatively high yields comprising the steps of:

  • a.) providing an agitated, fluid bed constituted by freely flowing, solid, particulate, alpha amino acid;

    b.) heating the fluid bed to a temperature of at least about 180°

    C. (356°

    F.) and maintaining the heated bed at a temperature in the range of about 180°

    C. (356°

    F.) to about 250°

    C. (482°

    F.) for a time period sufficient to polymerize the alpha amino acid and to drive off water from the heated bed while maintaining the mean bed particle size and a value of no more than about 150 microns and while providing a degree of agitation sufficient to maintain the particles in a substantially free-flowing state throughout the time period; and

    c.) recovering anhydropolyamino acid from the fluid bed.

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