Patent ID: 7582481

Claim:
A method of multiple reaction in a microreactor in which a plurality of different fluids are caused to flow together into a microreactionchannel, and are mixed with each other by molecular diffusion to perform multiple reaction while being caused to flow as laminar flows, the method comprising: distributing each of the plurality of different fluids to a plurality of fluid introduction channels; selectively introducing each of the plurality of different fluids into the microreactionchannel through the plurality of fluid introduction channels which divide the plurality of fluids into a plurality of fluid segments in a diametral section at an entrance side of the microreactionchannel; changing at least one of the diffusion distance and the specific surface area of the plurality of different fluids flowing together into the microreactionchannel by dividing each of the plurality of different fluids into a plurality of fluid segments in a diametral section of the microreactionchannel at the entrance side of the microreactionchannel, and by causing the plurality of fluid segments of the different fluids to contact each other in the microreactionchannel.