| 摘要 |
A new method of removing a spent pyrophoric reaction catalyst from a reaction mixture, safely, cheaply and rapidly using a single plate pressure filter comprises a process wherein, after hydrogenation, the reaction mixture is decanted, the desired hydrogenation product is removed and catalyst rich material which settles at the bottom of the vessel is delivered to a single plate pressure filter. The spent catalyst is retained in the filter bag and stored under water awaiting recovery. Also provided is a filter apparatus (1) which comprises a domed base (2), a generally cylindrical sidewall (3) terminating in an upper rim (4) closed by a lid (5) having lifting lugs (6). The lid (5) is fixed in pressure-tight engagement with the sidewall (3) by flange engaging screw clamps (7) and an embedded polytetrafluoroethene gasket (8). <Figure 5>
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