Removal of mercury from process streams

Liquid purification or separation – Processes – Ion exchange or selective sorption

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210678, 210679, 210688, 210689, 210914, 55 72, 55 74, 55 75, 55 31, 423107, 423210, B01D 1500, B01D 5304

Patent

active

052231453

ABSTRACT:
Mercury is often removed as an impurity from process fluid streams by adsorption in fixed beds using any of several well-known adsorbents having the ability to selectively adsorb mercury. It is also common to reintroduce this sequestered mercury into the environment by means of the spent gas used to periodically regenerate the fixed beds. A solution to this problem is provided by the present invention in which the mercury is removed from the process stream using a large non-regenerated adsorption bed in combination with a periodically regenerated secondary adsorption bed, the mercury content of the latter being transferred to the former during the regeneration procedure.

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Barrer et al, J. Chem. Soc. (1967) pp. 19-25.

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