RT Journal Article
SR Electronic
T1 Temperature Dependence of Tannin Adsorption by Poly-N-Vinyl Pyrrolidone
JF American Journal of Enology and Viticulture
JO Am J Enol Vitic.
FD American Society for Enology and Viticulture
SP 162
OP 167
DO 10.5344/ajev.1970.21.3.162
VO 21
IS 3
A1 Randall H. Mennett
A1 T. O.M. Nakayama
YR 1970
UL http://www.ajevonline.org/content/21/3/162.abstract
AB The kinetics of tannin adsorption by poly-N-vinyl pyrrolidone is investigated. The rate of adsorption with tannic acid is found to be between 3rd and 4th order in tannic acid. For the adsorption of wine solubles the rate is highly concentration-dependent, being above 4th order. The reaction is very fast at all temperatures and has an exceedingly small activation energy. Adsorptive capacity is gained by carrying out the process at low temperatures.