Premium
Methods for preparation of absorbent microspherical tannin resin
Author(s) -
Yamaguchi Haruhiko,
Higuchi Mitsuo,
Sakata Isao
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070450814
Subject(s) - adsorption , tannin , formaldehyde , materials science , hexane , nuclear chemistry , condensed tannin , chemistry , porosity , chromatography , chemical engineering , organic chemistry , polyphenol , proanthocyanidin , food science , engineering , antioxidant
Tannin beads formed by reaction of Mimosa tannin (condensed‐type tannin) with formaldehyde in nonpolar polybutenous medium were microspherical resins. Resins prepared with 37.5% tannin concentration were porous spherical resins with 139.22 m 2 /g of surface area (adsorption method of iodine in n ‐hexane, 2.1 m 2 /g for the dried beads by the Braunauer‐Emett‐Teller (BET) method) and were strong enough to withstand use on a column. The spherical resin adsorbed 3.7 mmol of Cr 6+ ions per one gram dry weight of resin (by batch method), this adsorption being comparable to commercial adsorbent.