Hoogovens Ijmuiden B.v.

Sheldon Evans

A method for regenerating a weak base anion exchanger which comprises passing a regenerating chemical in an upward direction through a granular resinous mass of an exchanger, thereupon displacing the chemical and rinsing the mass with water. The regenerating chemical is a lime slurry having a concentration of 1 to 5% by weight, which is both supplied to and withdrawn from the granular mass in an evenly distributed flow with a flow rate of at least 10 m.sup.3, per hour, per m.sup.3 resin material (m.sup.3 /h/m.sup.3), while the granular mass is in a compacted state.

Method for regenerating a weak base anion exchanger

A regenerative base ion exchange process involving the step of passing a liquid upwardly through a bed of particulate solid base ion exchange resin in a chamber of a two-phase reactor to regenerate said resin, wherein the rate of liquid flow is such that the solid resin is compacted and held by the liquid as a compact bed against a barrier located above it and is prevented by the liquid from sinking.

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Overveen, Netherlands

Sheldon Evans