Dorr-oliver Incorporated

Other

Joseph B Culkin

Adam Koffler

A method and apparatus for separating particles mixed with liquid utilizing a container for holding the same. The system also employs at least one separation membrane, which is permeable to the heterogeneous particles mixed with the liquid, divides the container into first and second separation chambers. A pump biases the flow of the particle liquid mixture from one side of the membrane to the other. Simultaneously, an electric field or potential is applied to the particle liquid mixture to bias flow of the same in the other direction.

Apparatus and method for separating particles

Particulates are separated from colloidal suspensions by filtration where the filter is oscillated relative to the suspension in order to inhibit plugging of the filter. Plugging is substantially eliminated and filtration rates greatly enhanced by oscillating the membrane at a sufficiently high frequency and with a sufficiently large displacement so that the Reynold's number of the relative flow is greater than about 1.

Method and device for separation of colloidal suspensions

An electrically augmented vacuum filtration apparatus for dewatering a suspension of solids wherein the transport of ions into the cake product is controlled by provision of a suitable anionic solid polymeric electrolyte arranged to isolate at least one electrode from the suspension of solids.

Electrically augmented vacuum filtration apparatus for producing a

A system and apparatus for dewatering a suspension of solids in a carrier liquid by means of an electrically augmented vacuum filter having an anodic electrode structure comprising an anode and a liquid impervious wall, wherein the wall is a non ion selective membrane which is permeable to both cations and anions. The non ion selective membrane being impervious to the suspension solids, carrier liquid, electrolyte and gaseous electrode reaction products. This non ion selective membrane comprises a substrate and a solid polymeric film, wherein the substrate is a cloth support and the solid polymeric film comprises a cation exchange resin, an anion exchange resin and a binder. The charge transfer numbers of the non ion selective membrane t.sup.+ is in the range of 0.20 to 0.80 and t.sup.- in the range of 0.80 to 0.20, respectively.

Non ion selective membrane in an EAVF system

A method and apparatus for measuring the unsteady sedimentation potential of particle in a suspension comprising: inserting at least a portion of the suspension of particles in a cell, the cell having a first electrode and a second electrode; vibrating the cell to accelerate the particles in suspension; and measuring the unsteady sedimentation potential of the particles across the first and second electrodes. The cell is vibrated at a frequency in the range between 0.0001-50 khz.

Method and apparatus for measuring the unsteady sedimentation potential

This invention relates to a system and method for rapidly and efficiently dewatering or separating particles by electrofiltration in which the suspension of solids is first demineralized. The suspension of solids may be demineralized by electrodialysis, dialysis, filtration, diafiltration or washing on a rotating-drum continuous-suction filter.

Method and apparatus for electrofiltration

A system and apparatus for dewatering a suspension of solids in a carrier liquid by means of an electrically augmented vacuum filter having an anodic electrode structure comprising an anode and a liquid impervious wall, wherein the wall is a non ion selective membrane which is permeable to both cations and anions. The non ion selective membrane being impervious to the suspension solids, carrier liquid, electrolyte and gaseous electrode reaction products. This non ion selective membrane comprises a substrate and a solid polymeric film, wherein the substrate is a cloth support and the solid polymeric film comprises a cation exchange resin, an anion exchange resin and a binder. The charge transfer numbers of the non ion selective membrane t.sup.30 is in the range of 0.20 to 0.80 and t.sup.- in the range of 0.80 to 0.20, respectively.

A method and apparatus for determining the zeta potential of particles in a suspension comprising: a cell containing at least a portion of the suspension of particles; a first electrode and a second electrode disposed in a cell; means for producing an electric field between the first and second electrodes, the electric field causing the particles to accelerate; means for converting a force, the force being generated by the acceleration of the particles, into electrical energy; and means for measuring the electrical energy.

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Wilton, CT, United States of America

Joseph B Culkin