Evacuation and inert gas introduction apparatus

摘要

The evacuation and inert gas introduction apparatus capable of quickly switching over between the evacuation state and the inert gas introduction state, is provided for a synthesizing device for molecular asymmetrical catalysts. The evacuation line (10) is connected to a vacuum pump via a cock (13) and solvent trap (15). The inert gas introduction line (20) is connected to an argon gas cylinder via a cock (21). The vacuum cavity (36) is provided at a tip end of the housing (35) of the three-way cock (30), and thus the inside plug (37) is attracted towards the vacuum cavity (36). The evacuation line (10) is connected to the first port (31) of the three-way cock (30), the inert gas introduction line (20) is connected to the second port (32) and the each reaction chamber of the synthesizing apparatus is connected to the third port (33). As the rotation angle of the inside plug (37) is changed, the connection state of the line is switched.