Liquid purification or separation – Casing divided by membrane into sections having inlet – Each section having inlet
Patent
1992-06-30
1993-06-08
Sever, Frank
Liquid purification or separation
Casing divided by membrane into sections having inlet
Each section having inlet
21032184, B01D 6128
Patent
active
052176126
ABSTRACT:
Diffusion dialysis system which is decontaminated acids which have been contaminated with metal ions, such as during plating operations and the like. The system includes a plurality of vertically stacked, horizontally disposed anion exchange cells. Each cell includes the anion exchange membrane adapted to permit the diffusion of anions and to block the diffusion of cations therethrough. The system includes a frame which supports one supply tank for holding water and another supply tank for holding the waste acid each disposed at a level higher than the stack of anion exchange cells so that the water and acid will have a head of static pressure. Each cell of the stack includes channels for supplying waste acid to one side of the membrane and water to the opposite side of the membrane and at the opposite ends thereof to provide for the counterflow of acid and water across the upper and lower surfaces of each membrane. An open-network grid on each side of each membrane to cause turbulence in the flow of the water and waste acid. A supply conduit is connected from the acid tank to the upper cell of the stack and another conduit is connected to supply water to the bottom cell of the stack. An output conduit is connected from the acid side of the bottom cell to the suction side of a vacuum pump. Another conduit is connected from the water side of the top cell to the suction side of a second pump. The static pressure and the vacuum pumps cause the acid and the water each to be drawn at a uniform rate through the cells of the stack for the diffusion dialysis process.
REFERENCES:
patent: 5062960 (1991-11-01), Aoki et al.
Poly-Plating, Inc.
Sever Frank
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