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US 2020/0061491 A1Published application
Cascade tray, rectifying column containing said cascade tray, method for operating such a rectifying column, and use of same
AssigneeCovestro Deutschland AG
InventorsBernd PENNEMANN, Jürgen BAUSA
Life of this patent
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Abstract
The invention relates to a cascade tray suitable for use in a rectifying column and comprising openings in the weir-type cascade edge, to a rectifying column containing at least one cascade tray according to the invention, to a method for operating such a rectifying column, and to the use of a claimed rectifying column in the fractionation of specific substance mixtures.
Claims15
A cascade tray (100) suitable for contacting liquid (1) flowing downward in a column body (200) with ascending vapor (2), wherein the cascade tray (100) comprises:
- an outflow weir (500) for banking up downflowing liquid (1) and
- at least one further weir, the cascade weir (600), which is arranged upstream of the outflow weir, where the at least one cascade tray (100) has an offset (700) at the position of the at least one cascade weir (600) so that the part (120) of the cascade tray (100) containing the outflow weir (500) is at a lower level than the upstream part (110) of the cascade tray (100), and
- a part (120) of the cascade tray (100) containing the outflow weir (500) and an upstream part (110) of the cascade tray (100) each compromise openings (800) for passage of the ascending vapor (2), and
- wherein the cascade weir (600) has openings (900) for passage of the liquid (1).
1 more element
Dependencies are inferred from the claim text.