PROCESS FOR MAKING COUPLER DISPERSIONS

摘要

A method and apparatus relate to mixing solutions in which a well-stirred coupler/coupler solvent mixture is fed through a tube to an annular, flow-restriction plate arranged within an aqueous gelatin bulk mixture. A rotatable impeller is mounted in spaced relation to the plate and pumps the gelatin bulk mixture through the central opening or aperture in the plate and into the gap between the plate and the impeller. The impeller is provided with a number of concentric recesses interconnected by radial slots forming a circuitous path to the peripheral edge thereof. The flows of coupler/coupler solvent and gelatin bulk mixture are broken up by the radial slots and the annular recesses in conjunction with the fluid shear developed at the peripheral edge of the impeller.