Purification of carbonate process solutions
AssigneeAllied Chemical Corporation
InventorsEugene Baker Port, Norman Rutledge Garofano
Life of this patent
Estimating the term…
Abstract
Present process relates to the purification of carbonate process solution which comprises passing said carbonate process solution through a bed of activated carbon to remove organic contaminants from said solution until the adsorbent capacity of said bed is reduced and regeneration of said bed is effected by passing an aqueous solution through said bed to remove the absorbed organics, said aqueous solution being maintained at elevated temperatures.
Claims3
A process for the reduction of soluble organic contaminants in a carbonate process solution which comprises passing said process solution through a bed of activated carbon particles until the adsorption efficiencies of said bed for the removal of said organic contaminants is reduced to at least 75% of the original adsorptive capacity of the activated carbon bed prior to regeneration, regenerating said bed by subjecting said bed to an aqueous wash cycle which comprises passing an aqueous wash liquor through said bed until at least 60% of said adsorbed organic contaminants have been desorbed, wherein the flow rates of the aqueous wash liquor are periodically randomly varied from flow rates insufficient to effect reorientation of the carbon bed particles to flow rates sufficient to effect volume bed expansion up to about 75% of the static bed volume and said aqueous wash liquor has an organic contaminant level lower than the carbonate process solution and said aqueous wash liquor is maintained at a temperature between 50.degree. and 95.degree. C.
Dependencies are inferred from the claim text.