Glycol purification with minimal pH drop
AssigneeCalgon Carbon Corporation
InventorMichael R. Rosene
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Abstract
Standard activated carbons have been commonly employed in the purification of contaminated glycol scrubbing solutions used in a liquid-liquid extraction process for the manufacture of petrochemicals. These carbons are shown to cause a depression of pH within the glycol stream when a new carbon type is installed or when the exhausted carbon is replaced. The use of a magnesite containing activated carbon minimizes this pH drop to acceptable levels.
Claims7
In the purification of contaminated glycol scrubbing solutions used in a liquid-liquid extraction process for the manufacture of petrochemicals by passage of said glycol solutions through an activated carbon filter, the improvement comprising minimizing glycol pH reduction by:
- employing a magnesite containing activated carbon.
Dependencies are inferred from the claim text.