Liquid purification or separation – Filter – Within flow line or flow line connected close casing
Reexamination Certificate
2005-05-03
2005-05-03
Kim, John (Department: 1723)
Liquid purification or separation
Filter
Within flow line or flow line connected close casing
C210S241000, C210S451000, C210S477000, C210S478000
Reexamination Certificate
active
06886698
ABSTRACT:
Spent pyrophoric reaction catalyst from a reaction mixture is removed safely, cheaply, and rapidly using a single plate pressure filter. 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 fitted with a filter bag40of permeable material. The spent catalyst is retained in the filter bag40and stored under water awaiting recovery. The filter apparatus1comprises a container having a domed base2, a generally cylindrical sidewall3terminating in an upper rim4closed by a lid5having lifting lugs6. The lid5is fixed in pressure-tight engagement with the sidewall3by flange engaging screw clamps7and an embedded polytetrafluoroethene gasket8. The filter bag40is held in position by a band11and may be readily released for removal of the spent catalyst material. The bag40may be reused.
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PCT International Search Report for PCT/IE00/00156.
PCT International Search Report for PCT/1E00/00155.
Kim John
Tinney Francis J.
Warner-Lambert & Company
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