多種粒子を含む懸濁液中での湿式造粒の検討

Abstract

Wet agglomeration was investigated in a suspension of particles of polar materials, soda-lime glass and calcium carbonate, and nonpolar material, polyethylene, using a nonpolar bridging liquid, dodecane. 10-2 mol/l-NaCl aqueous solution was used as a dispersion medium, and sodium oleate or dodecylamine hydrochloride was added to it as an additive surface active agent. Adsorption of surface active agent on particles of soda-lime glass and calcium carbonate at an appropriate value improved the wettability of particles to dodecane, and therefore facilitated the wet agglomeration of particles. Wettability of polyethylene particle to dodecane was good without surface active agent. When the concentration of additive surface active agent was less than 10-3 mol/l, the surface active agent did not affect the wettability of polyethylene particle to dodecane. Selective wet agglomeration was successfully performed in a suspension of multiple materials by controlling the adhesion tension of dodecane on each particle. Separation of each particle from suspension was carried out well by taking advantage of the selective wet agglomeration.