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  Home > JCE Print > Journal of Chemical Education > Issues > 1997  > April  >
In the Classroom
Filtrates and Residues
Rayon from Dryer Lint: A Demonstration
Michael A. Knopp
Miami University Middletown, 4200 E. University Blvd, Middletown, OH 45042
Cover
April 1997
Vol. 74 No. 4
p. 401
Abstract
In this demonstration, ordinary household dryer lint from the laundering of cotton items is stirred into the traditional Schweizer reagent mixture, a saturated solution of copper (II) carbonate in concentrated ammonium hydroxide. Any insoluble material (i.e. hair) is removed with a glass rod. The resulting deep blue viscous solution is taken up in an eye dropper and extruded into a 190 x 100 mm glass recrystallizing dish, which contains a dilute (3M) solution of sulfuric acid. Threads of rayon several cm in length can be thus formed. These threads are best viewed by the audience on an overhead projector. The sulfuric acid solution and threads are disposed of in compliance with local environmental regulations.
More Information
*  Citation
 Knopp, Michael A. J. Chem. Educ. 1997 74 401.
*  Keywords
*  History
 Created:
Last Updated:		 July 28, 1999
June 23, 2005
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