Recycling of Experimental Waste Liquid Containing Iodine and Carbon Tetrachloride.

Experimental waste liquid from the experiment named determination of chemical equilibrium constant and partition coefficient was used as raw materials, The optimum conditions for recycling of the waste liquid containing iodine and CCl₄ was investigated, in which KIO₃ was employed as oxidants and recovery yield of iodine as research indicator. The results shows that recovery yield of iodine can reach 91. 43% under the following conditions; 1. 2 times theoretical amount of KIO₃ and theoretical amount of sulfuric acid, reaction time 0. 5 h, V( CCl₄) : V(concentrate water) 500 mL : 200 mL. Recycled carbon tetrachloride containing iodine was used in experimental determination of partition coefficiency (K_d) and equilibrium constant (K_c). Compared with original CCl₄ containing iodine, the error of K_d and K_c is 0. 75% and 1. 87%, respectively. The results indicate that recycling procedure is appropriate and recycled CCl₄ containing iodine can be used in the experiments. [ABSTRACT FROM AUTHOR]