Effect of base addition rate on the preparation of partially neutralized ferric chloride solutions

Ta Kang Liu, Edward S.K. Chian

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Cationic polymers prepared from partially neutralized ferric chloride solutions were investigated using photon correlation spectroscopy (PCS) techniques. To study the speciation and yield of the polymers, FeCl3 solutions were hydrolyzed by adding NaHCO3 solution for a range of hydrolysis ratios (B=[OH]/FeT) of 0 to 2.0 under different base addition rates. It was observed that the prepared solution has a higher degree of polymerization at a higher base addition rate. The "B rate" (RB, 1/time), i.e., the rate of change of B during preparation, was found to have a dramatic effect on the speciation of the partially neutralized ferric chloride solution. High-yield inorganic iron(III) polymer (∼80%) can be produced in a specific range of B rates. These iron(III) polymers, having a size ranging from 3 to 7 nm, were stable without precipitation of ferric hydroxide microcolloids after aging for 2 weeks.

Original languageEnglish
Pages (from-to)542-547
Number of pages6
JournalJournal of Colloid And Interface Science
Volume284
Issue number2
DOIs
Publication statusPublished - 2005 Apr 15

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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