| 摘要 |
<p>A layer of precoat filter aid material including powdered activated carbon removes oxygen and impurities from a liquid having hydrazine added thereto. Oxygen concentrations may be reduced to parts per billion concentrations. Suspended solids can be removed by the precoat layer, and if the precoat layer includes an active particulate material, either as a component of the precoat layer or as an underlayer, the concentration of impurities and dissolved solids in the liquid can also be reduced.</p> |
