OPTIMIZATION OF DEHYDRATION CONDITIONS FOR ISOPROPYL ALCOHOL WATER MIXTURE USING OXIDIZED POTATO STARCH

摘要

This study investigated the possibility of dehydrating Isopropyl Alcohol water mixture using oxidized starch from potato. The starch was modified using calcium hypochlorite. Central composite design was used to determine the effects of the four dehydrating variables; temperature, contact time, initial concentration of the isopropyl alcohol water solution and the adsorbent/solution ratio on the final concentration of the isopropyl alcohol water mixture. Based on the central composite design, a quadratic verses 2 factor interaction model was developed. The significant factors on the experimental design response were identified from the analysis of variance. The optimum conditions for the dehydration reaction were obtained by using temperature of 35oC, time of 40 minutes, adsorbent/solution ratio of 1:4 and initial concentration of 40% which resulted in final concentration of 43.968%.