Degassing column
AssigneeHoechst Aktiengesellschaft
InventorsBernhard Kuxdorf, Karl Kaiser, Kurt Wissel
Life of this patent
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Abstract
In a degassing column with several perforated plates arranged over one another and at a distance from one another in a column housing there is left free, between each plate and the column housing, a gap which is as small as possible and is uniform over the periphery, and the apertures in the plates have a diameter of less than 5 mm. Each plate is penetrated by at least one eccentrically arranged draining shaft, and at least one eccentrically arranged feed shaft ends above each plate. Finally, below each feed shaft on the plate an area is impermeable which is at least as large as the cross-section of the feed shaft.
Claims15
A degassing column for removing monomers from polymers present in dispersions comprising a vertically elongated tubular shell provided with a plurality of substantially horizontally disposed apertured plates;
- said plates being vertically spaced within and attached to the inner surface of said shell;
- each of said plates being penetrated by at least one eccentrically arranged conduit comprising a draining shaft in the upper portion thereof and a feed shaft in the lower portion below the penetrated plate;
- degassing column wherein the apertures in said plates have a diameter of less than 5 mm;
- each plate is supported by a plurality of wedge mountings and is wedged therewith, said wedge mountings being fastened around the inner surface of said shell;
- a small gap uniform in width over the periphery is left between each plate and said shell;
- the distance between the upper end of each conduit and the plate penetrated by it is 80 to 400 mm;
- the distance between the lower end of each conduit and the next plate arranged below it is 10 to 100 mm;
- and a surface portion of each apertured plate underneath each conduit is impermeable;
- said impermeable surface portion being one to two times the cross-sectional area of the conduit.
Dependencies are inferred from the claim text.