Sorption of unsaturated monocarboxylic acids on anionexchange resins and non-ionic resins from aqueous solutions

✍ Scribed by Lutful M. Jahangir; Olof Samuelson

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 684 KB
• Volume: 237
• Category: Article
• ISSN: 1873-3778
• DOI: 10.1016/s0021-9673(00)97623-4

✦ Synopsis

An increasing number of carbon atoms in unsaturated carboxylic acids gave rise to increased distribution coe&ients in sulphate and acetate solutions, both on styrene-divinylbenzene resins and on anion-exchange resins. On the non-ionic resins the double bond led to a large decrease in the retention volume, which was less for 2alkenoic acids than for isomers with the double bond more distant from the carboxylic acid group. The results indicate that hydrophobic interactions had a larger effect than z-bond interactions with the aromatic resin. For the anion exchangers, hydrogen bonding expIains the higher retention of 2-alkenoic than alkanoic acids.

The carboxylate ions derived from 2-alkenoic acids exhibited a higher ionexchange aflinity than those from alkanoic acids. This can be related to the greater acid strength of the parent acid.