| 摘要 |
Spent pyrophoric reaction catalyst from a reaction mixture is removed safely , cheaply and rapidly using a single plate pressure filter. After hydrogenatio n, the reaction mixture is decanted, the desired hydrogenation product is removed a nd catalyst rich material which settles at the bottom of the vessel is delivere d to a single plate pressure filter fitted with a filter bag (40) of permeable material. The spent catalyst is retained in the filter bag (40) and stored under water awaiting recovery. The filter apparatus (1) comprises a container having 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). The filter bag (40) is held in position by a band (11) and may be readily released for removal of the spent catalyst material. The bag (40) may be re-used.
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