1. Chemical Process Engineering, Faculty of Engineering Osaka University, Yamada-oka 2-1 Suita, Osaka 565, Japan Department of Applied Chemistry Faculty of Engineering, Osaka University Machikaneyama-cho 1-16, Toyonaka 560, Japan Department of Chemistry, Faculty of Science Osaka City University, Sugimoto-cho 3-3 Sumiyoshi-ku, Osaka 558, Japan