Patent ID: 7182553

Claim:
A method of delivering a fine particle dispersion, to minimize stagnation, depositon or clogging in which the fine particles are dispersed in a liquid medium, in a state of laminar flow from an inlet port to an outlet port of a microflow channel having the inlet port and the outlet port, the method comprising; arranging the microflow channel such that an outlet port is disposed above an inlet port in a buoyant force direction, setting an angle of the microflow channel extending from the inlet port to the outlet port within a range of 0° to 45° relative to the buoyant force direction, and introducing the fine particle dispersion into the inlet and delivering, by the liquid medium the fine particle dispersion to the outlet port, wherein fine particles of the particle dispersion have a volume average particle size within range of 1.5 μm to 1000 μm, and a specific gravity of the fine particles is within a range of 0.10 to 0.99 times that of the liquid medium such that stagnation, deposition or clogging is minimized.