Heavy metal adsorbents of high selectivity, process for production of same, and adsorption process
AssigneeUnitika Ltd.
InventorAkio Sasaki
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Abstract
A heavy metal adsorbent of high selectivity, a process for the production thereof, and an adsorption process using the heavy metal adsorbent are described; the adsorbent exhibits high adsorptivity particularly for mercury, and has excellent chemical stability, e.g., heat resistance and alkali resistance, and dimensional stability. This adsorbent is applicable, e.g., to the removal of mercury from waste water resulting from the washing of smoke in huge incineration stations, from saturated brine used in the sodium industry in an ion exchange membrane method, and so forth.
Claims23
A heavy metal adsorbent of high selectivity which is prepared by treating active carbon with at least one water-soluble primary or secondary amine and carbon disulfide in the presence of water.
A process for producing a heavy metal adsorbent of high selectivity which comprises treating active carbon with at least one water-soluble primary or secondary amine and carbon disulfide in the presence of water.
An adsorption process of a heavy metal-containing solution which comprises bringing a heavy metal adsorbent of high selectivity prepared by treating active carbon with at least one water-soluble primary or secondary amine and carbon disulfide in the presence of water into contact with a heavy metal-containing solution.
Dependencies are inferred from the claim text.