Dialysis with ion exchange extraction of phosphates
AssigneeAkzo N.V.
InventorsRobert Smakman, Gerrit H. van den Berg
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Abstract
An apparatus for purifying blood has a blood compartment and a clearance compartment separated by a semi-permeable membrane. The apparatus includes a device containing a cation exchange resin charged with metal ions whose phosphates are insoluble in water. Metal salts of iron, aluminium, zirconium, lanthanum, thorium and tin are deposited on a cation exchange material and the charged cation exchange resin is contacted with dialysis liquid. The process of treating blood with the dialysis liquid is also contemplated.
Claims19
An apparatus for the purification of blood comprising at least one selectively permeable membrane, a blood compartment on one side of the membrane and a clearance compartment on the other side thereof, means for passing through said compartments blood and a dialysis liquid, respectively, for removing the waste products from the blood, and a sorbent which is in contact with the clearance liquid and serves to extract phosphates from the liquid discharged from the clearance compartment, said sorbent being an organic cation exchanger charged with ions of a metal whose phosphate is poorly soluble in water.
In a method of purifying blood which comprises treating the blood in a hemodialyzer with a dialysis liquid, the improvement which comprises contacting the blood with an ion exchange resin charged with metal ions which will combine with phosphate ions to form a phosphate which is substantially insoluble in blood.
Dependencies are inferred from the claim text.