Chem. J. Chinese Universities ›› 2001, Vol. 22 ›› Issue (3): 435.

• Articles • Previous Articles     Next Articles

Investigation on the Adsorption of Polyvalent Low-molecular-weight Dispersants on Alumina

LIU Yang-Qiao, GAO Lian, GUO Jing-Kun   

  1. The State Key Laboratory of High Performance Ceramics & Superfine Microstructure Studies, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2000-03-27 Online:2001-03-24 Published:2001-03-24

Abstract: The adsorption of 2-phosphonobutane 1,2,4-tricarboxylic acid (PBTCA) and citric acid on alumina was determined by using the ferric 5-nitrosalicylate spectroscopic method. The saturation adsorption of PBTCAwas found to be much higher than that of citric acid. FTIRand AESresults revealed that the phosphonyl group participated in the chemisorption of PBTCAonto alumina. The higher dispersing efficiency of PBTCAthan citric acid was attributed to its high number of charges and high chelating ability at high pH.

Key words: Alumina, Citric acid, PBTCA, Adsorption

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