Abstract:
The invention provides a process for separating a solution from magnetic resin portions, particles and/or fines by passing a solution containing the resin portions, particles and/or fines through a bed of particulate magnetic material.
Abstract:
A fluidized bed chromatographic process for the purification and binding of molecules in a liquid to an active substance covalently bound to chromatographic adsorbent particles. The adsorbent particles are formed of a porous composite material having pores allowing access to the interior thereof and consisting of at least two density controlling particles of low or high density, or both, and a matrix formed by consolidating at least one conglomerating agent. The density controlling particles are dispersed in the matrix. The adsorbent particles have a relative density with respect to the liquid which is less than 0.95 and greater than 1.1, and they have a particle size within the range of 50-750 .mu.m. The relative density and particle size range of the adsorbent particles are selected to provide desired floatation/sedimentation properties of the adsorbent particles in the liquid in the fluidized bed process.
Abstract:
Processes for deionization and demineralization of a fluid containing ions comprising:(a) Loading an amine or ammonia buffer onto a first weakly acidic cation exchange resin to occupy cation exchange sites and to form a first bed comprising a first amine-buffered resin;(b) Passing said fluid containing ions through said first bed comprising said first amine-buffered resin and exchanging cations of said fluid for amine cations of said first amine-buffered resin to form a first effluent comprising an anion-buffer salt complex;(c) Passing said anion-buffer salt complex through a first weakly basic anion exchange resin where an anion portion of said anion-buffer salt complex is split from said anion-buffer salt complex by adsorption of said anion portion onto said weakly basic anion exchange resin to form a second effluent comprising buffer in free hydrated base form;(d) Passing said buffer in free hydrated base form to a second weakly acidic cation exchange resin where said buffer loads onto said second weakly acidic cation exchange resin as in step (a) and repeating the process of steps (b)-(d); and(e) Regenerating said first weakly acidic cation exchange resin with an organic acid.
Abstract:
A water treating apparatus is provided which can treat waste water for use as raw water in an ultrapure water producing system without addition of various kinds of chemicals. The apparatus includes a first water tank for receiving acid waste water, a second water tank for subjecting the waste water from the first water tank to solid-liquid separation and discharging supernatant liquid, an ion exchange tank including ion exchange resin and an aeration tube for generating treated water through a membrane filter, a precipitation tank for settling ion exchange resin, an air lift pump for introducing ion exchange resin from the precipitation tank into the first water tank, and a return air lift pump for returning ion exchange resin from the second water tank to the ion exchange tank. The ion exchange resin acts to exchange ions with fluorine ions of treated water in the ion exchange tank and is regenerated by acid waste water in the first water tank.
Abstract:
Disclosed is a novel continuous ion exchange apparatus capable of performing both ion exchange treatment and regeneration treatment within a single column by the use of ion exchange resin(s) whose ion exchange abilities can be regenerated by acid or alkali. The apparatus comprises a resin column or two including an adsorption zone, a washing zone, a regenerating zone sequentially sectioned from the bottom toward the top; a resin extraction transfer means for withdrawal the ion exchange resin from the bottom of the column and transferring them to a metering container disposed on the top of the column; a resin supply means for supplying the ion exchange resin within the metering container to the top of the column, a water passage system allowing the supply of feed water into the interior of the column from the bottom of the adsorption zone and allowing discharge of the treated water from the top of the adsorption zone to the exterior of the column; and a regenerant passage system allowing the supply of the regenerant from the bottom of the regeneration zone into the interior of the column and discharge of regenerant waste from the top of the regeneration zone to the exterior of the column.
Abstract:
Purification of aqueous hydrogen peroxide solutions using conventional ion-exchange techniques can result in the hydrogen peroxide decomposing explosively. Much safer processes are obtained by restricting the contact between the resin bed and the hydrogen peroxide solution to a very short contact time, by employing a treatment chamber that is vented to the atmosphere and also by slurrying the resin bed. The bed is conveniently retained on a mesh that acts as a filter (13) preferably conical having an aperture (17) at its apex through which is introduced a small fraction of the solution countercurrent (10) to the main solution flow (9) in order to slurry the bed (19). The solution can be recycled through the same bed or a plurality of beds. Very high purification can be achieved and combined with improved safety of operation.
Abstract:
An ion-exchange resin holder (18) to recover silver from photographic rinsing water with a perforate inlet (37) and outlet (29) resin restrainer between which a mass (38) of ion-exchange resin is restrained in the holder and a liquid restrainer (32) near the inlet for deflecting part of the incoming water towards the bottom end, and for allowing another part of said incoming water to pass undeflectedly towards the outlet opening.
Abstract:
Silver is recovered from the rinse water from a photographic film processing unit by means of a silver recovery device in which the rinse water is passed through at least one bed of ion exchange resin particles maintained in fluidized condition by the water flow. A plurality of such beds are preferably connected in series with rinse water being recirculated until fresh rinse water causes overflow to the next bed and finally to a collection vessel. Fluidization is interrupted periodically to create quiescent periods which aid in removal from the resin particles of accumulated gelatin from the processed film.
Abstract:
Sorbable ions are removed from aqueous compositions by the use of an apparatus and method which permits the aqueous composition to flow in an uninterrupted or continuous manner. Included is a resin cycling contactor assembly which continuously accepts the flow of aqueous composition and which turbulently contacts it in a generally co-current elongated contactor path during which ions are removed from the aqueous composition and sorbed to the resin. The resin cycles within the resin cycling contactor assembly until a selected degree of resin contamination is achieved, at which time a predetermined portion of the resin is removed from the resin cycling contactor assembly and replaced by regenerated resin. The resin is regenerated within a regenerator assembly which accomplishes regeneration by counter-current flow of liquids through a packed resin bed.
Abstract:
A method and apparatus for the continuous treatment of fluid with a contact media. The apparatus includes a plurality of vertically arranged chambers through which the fluid flow passes. The contact media may be selectively removed from each chamber and moved to a tank for regeneration. Additionally, the contact media may be selectively moved from one chamber to another.