Preparation method of beta-dicarbonyl compound modified PASP (polyaspartic acid)

The invention discloses a preparation method of beta-dicarbonyl compound modified PASP (polyaspartic acid). The method comprises steps as follows: water is taken as a solvent, polysuccinimide and a beta-dicarbonyl compound are subjected to a reaction under catalysis of sodium hydroxide, and beta-dicarbonyl compound modified PASP is obtained. With the adoption of the method, ecologically modified PASP with high scale inhibition efficiency can be obtained and has stable and proper viscosity average molecular weight, a new thought is provided for design and development of green and efficient water treatment chemicals, and the preparation method has quite great significance for development of an industrial recycling cooling water technology, increase of industrial production unitization rate and relieving of water resource shortage. 本发明公开了种β-二羰基化合物改性聚天冬氨酸的制备方法，该方法包括：以水为溶剂，在氢氧化钠的催化下，聚琥珀酰亚胺与β-二羰基化合物反应，得到所述的β-二羰基化合物改性聚天冬氨酸。采用本发明的方法可获得阻垢效率高的生态型改性聚天冬氨酸，具有稳定的、适宜的粘均分子量，为绿色高效水处理化学品的设计开发提供了种新思路，对于发展工业循环冷却水技术、提高工业生产利用率及缓解水