| 摘要 |
PURPOSE:To prevent deterioration of magnetic catalyst and also to disperse uniformly the magnetic catalyst in an original reaction soln. by backwashing said magnetic filter with the original reaction soln. CONSTITUTION:A reaction soln. is supplied to a magnetic filter 2 through a supply path 1 interposed with a solenoid valve 1A and magnetic catalyst is filtered through a filter medium 2B magnetized by an electromagnetic coil 2A. At the point of time in which the filter medium of the magnetic filter 2 is clogged and the filter efficiency is lowered thereby, the electric conduction to the coil 2A of the filter 2 is stopped and the valves 1A, 3B are closed to stop the supply of the reaction soln. and the original reaction soln. is supplied to filter 2 via a supply path 6 interposed with a valve 6A and a backwash tank 7 by opening a valve 8A of a backwash path 8. Also, gas such as nitrogen is supplied to filter 2 via a gas path 10 and a supply path 3 by opening a valve 10A. |
