海産, 畜産廃棄物からの白色カルシウムシアナミドの製造

概要

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Large amounts of wastes containing higher levels of calcium have been generated from the byproducts marine and livestock industries, i.e., shells, eggshells, and bones. Chemical and energy industries generate waste CO in a process of coke formation and waste NH3 in the hydrodenitrogenation of coals and petroleum. If CaCN2 can be formed from these wastes, the process could contribute to the reduction of solid wastes. With this point in mind, CaCN2 formation from shells, eggshells, and chicken bones was studied using pure NH3 and CO. About 18-20 wt% CaCN2 was formed from both kinds of shells through reaction with NH3 and CO at 600°C for 6-10 h and about 8 wt% from chicken bones under the same conditions. It was estimated from the balance of gaseous compounds that the major reaction is 6 CaO+6 NH3+6 CO→4 CaCO3+2 CaCN2+9 H2+N2.
一般社団法人廃棄物資源循環学会の論文
2003-01-31