| 摘要 |
PROBLEM TO BE SOLVED: To provide a dissolving device and a method for dissolving a particulate solid in a flow of a supercritical or almost critical fluid having a low pressure drop and a high dissolving rate compared to the prior art, and a dyeing device for dyeing a material with a dye dissolved in the flow of the supercritical or almost critical fluid. SOLUTION: The dissolving device for dissolving the particulate solid in the supercritical or almost critical fluid comprises a circulation loop, in which there is a feed for feeding a feed stream of the supercritical or almost critical fluid, a cyclone, which is in communication with the feed and has a principal discharge part 9 for discharging a principal discharge stream of a solution of the particulate solid in the supercritical or almost critical fluid and has an auxiliary discharge part 11 for discharging an auxiliary stream of the supercritical or almost critical fluid with solid particles dispersed therein, the auxiliary discharge being in communication with the feed.
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