Production of polyaspartic acid from maleic acid and ammonia

Details Production of polyaspartic acid from maleic acid and ammonia Production of polyaspartic acid from maleic acid and ammonia

C - Chemistry, Metallurgy

08

G

C08G 69/10 (2006.01) C08G 69/04 (2006.01) C08G 73/10 (2006.01)

Patent

CA 2181890

Polyaspartic acid is produced by thermal condensation of ammonium maleate derived from maleic acid and ammonia. Solid ammonium maleate in particulate form is heated to a temperature of at least about 170 °C to effect thermal condensation to a polysuccinimide which is then base hydrolyzed to a polyaspartic acid salt.

On produit de l'acide polyaspartique par condensation thermique de maléate d'ammonium provenant d'acide maléique et de gaz ammoniac. On chauffe le maléate d'ammonium solide sous forme particulaire jusqu'à une température d'au moins 170 ~C environ pour produire la condensation thermique sous forme d'un polysuccinimide qu'on hydrolyse ensuite avec une base pour obtenir un sel d'acide polyaspartique.

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