Method of multiple reaction in microreactor, and microreactor

1. 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.

2. The method according to claim 1 , wherein the number of the fluid segments is changed by the division.

3. The method according to claim 1 , wherein the sectional shape of the fluid segments in the diametral section of the microreactionchannel at the entrance side is changed by the division.

4. The method according to claim 1 ,wherein the arrangement of the fluid segments differing in kind in the diametral section of the microreactionchannel at the entrance side is changed by the division.

5. The method according to claim 1 , wherein a plurality of fluid segments having a rectangular sectional shape in the diametral section of the microreactionchannel at the entrance side is formed by the division, and the aspect ratio (the ratio of the depth to the width) of the fluid segments is changed by the division.

6. A method of multiple reaction in a microreactor in which a plurality of different fluids are caused to flow together into one microreactionchannel via respective fluid introduction channels, 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 the plurality of fluid introduction channels;

selectively introducing each of the plurality of different fluids into the microreactionchannel through the plurality of fluid introduction channels;

dividing each of the plurality of different fluids into a plurality of fluid segments forming rectangular sectional shapes in a diametral section of the microreactionchannel at the entrance side of the microreactionchannel;

arranging the plurality of fluid segments of the different fluids so that the plurality of fluid segments of the different fluids contact each other; and

changing a width of the arranged plurality of fluid segments of the different fluids in a direction of arrangement.

7. A method of multiple reaction in a microreactor in which a plurality of different fluids are caused to flow together into one microreactionchannel via respective fluid introduction channels, 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 the plurality of fluid introduction channel;

selectively introducing each of the plurality of different fluids into the microreactionchannel through the plurality of fluid introduction channels;

dividing each of the plurality of different fluids into a plurality of fluid segments forming rectangular sectional shapes in a diametral section of the microreactionchannel at the entrance side of the microreactionchannel;

arranging the plurality of fluid segments of the different fluids so that the plurality of fluid segments of the different fluids contact each other with a specified width; and

changing a concentration of the plurality of fluid segments of one fluid of the plurality of different fluids in the arranged fluid segments.