Properties of Cyclodextrins. Part V. Inclusion Isotherms and Kinetics of Inclusion of Benzoic Acid and m-Chlorobenzoic Acid on β-E25 Cyclodextrin-Epichlorohydrin Resin
✍ Scribed by N. Wiedenhof; A. G. Trieling
- Publisher
- John Wiley and Sons
- Year
- 1971
- Tongue
- English
- Weight
- 362 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0038-9056
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✦ Synopsis
In the previous part of this series (Starke 21 f1969/, 163) it has been shown that ,h'-E25 resins have affinity for aromatic compounds, e.g. benzoic acid and m-chlorobenzoic acid. Now it appears that mainly the undissociated acids are involved. The isothermal inclusion of undissociated benzoic acid can be described by a Langmuir isotherm. The isothermal inclusion of undissociated metachlorobenzoic acid follows no Langmuir equation. However, this inclusion can be described by a Freundlich isotherm. The kinetics of sorption of both acids are very complicated. At least three kinetic mechanisms are probably involved.