Abstract: A process for decolorizing and demineralizing a sugar solution without the need for using cation exchange resins or activated carbon. The process includes the steps of contacting the sugar solution with a macroporous polymeric adsorbent having cationic functional sites to decolorize and demineralize the sugar solution, and contacting the sugar solution with an anion exchange resin to further demineralize the sugar solution.

Abstract: An apparatus for continuous fluid-solid contacting includes a plurality of chambers on a rotating carousel, each chamber having a supply conduit and a discharge conduit, and a single valve for controlling a supply and discharge of fluid to the chambers. The valve includes a stationary annular disk having a plurality of conduits and a lower planar surface forming a disk valve face, and a rotatable annular plate having an upper planar surface forming a plate valve face and a plurality of holes forming ports in the plate valve face. The plate is supported in pressurized contact with the disk valve. The frame supporting the chambers and the annular plate are rotated by separate devices. To ensure that the valve ports remain in rotational correspondence with the rotating chamber frame, the invention includes optical control for synchronizing the rotation of the frame and the rotation of the annular plate.

Abstract: A process for removal of vanadium from wet process phosphoric acid comprising the steps of;(i) adsorbing an anionic pentavalent complex of vanadium, derived from the wet process phosphoric acid, onto an anion exchange resin or into an organic layer; and(ii) reducing the vanadium complex to trivalent and/or tetravalent vanadium so as to selectively strip vanadium from the anion exchange resin or from the organic layer.

Abstract: A continuous contacting device is disclosed wherein a fluid stream may be contacted with particulate exchange materials. The device includes a plurality of rotating chambers filled with particulate material. Fluid is supplied individually to these chambers through a plurality feed ports which are in periodic fluid communicating relation with each of the chambers. A plurality of fixed discharge ports which are likewise in periodic fluid communicating relation with each of the chambers is also provided. A process for continuously contacting fluids with the solid particulates is also disclosed.

Abstract: Apparatus designed to effect the continuous processing of gas mixtures for the selective removal of certain elements and constituents from the gases. A method is also disclosed by which the continuous process is carried out. A drum-shaped rotor unit has adsorbent carrying containers mounted about an axis. These containers rotate through a first circumferential zone in which gas processing occurs and a second circumferential zone in which regeneration occurs. This allows gas to constantly flow into the rotor unit at the first circumferential zone to undergo an adsorption process while also continuously providing regenerated adsorbent to the first circumferential zone.

Abstract: A continuous contacting device is disclosed wherein a fluid stream may be contacted with particulate exchange materials. The device includes a plurality of rotating chambers filled with particulate material. Fluid is supplied individually to these chambers through a plurality feed ports which are in periodic fluid communicating relation with each of the chambers. A plurality of fixed discharge ports which are likewise in periodic fluid communicating relation with each of the chambers is also provided. A process for continuously contacting fluids with the solid particulates is also disclosed.

Abstract: A process for treating acidic process waste water containing SiF.sub.6.sup.2- is disclosed. The process is carried out by contacting the waste water with a strong base ion exchange resin and loading SiF.sub.6.sup.2- onto the resin. Phosphate ions are then removed from the waste water by raising the pH of the waste water to between about 5.0 and 7.0 and contacting the waste water with a strong base ion exchange resin and loading phosphate ions onto the resin.

Abstract: A process for removing sulfur dioxide from flue gas is disclosed. After passing through a precipitator to remove particulate material, the flue gas is conducted continuously through a fixed bed solid-gas contacting device containing activated carbon or natural zeolite. The bed is regenerated continuously, thereby producing sulfuric acid which may be mixed with ground phosphate rock to produce normal superphosphate, or other by-products.

Abstract: A process for the production of dialkali metal phosphates by ion exchange is disclosed. The process is carried out by first ammoniating a water-soluble phosphate source such as phosphoric acid or monocalcium phosphate. The resulting ammoniated phosphate solution is then contacted with a weak cation exchange resin in the alkali metal form to produce the dialkali metal phosphate as well as an ammonium-loaded weak cation exchange resin. The cation exchange resin is regenerated by contacting it with an alkali metal salt solution which effects an exchange of alkali metal from ammonium to produce a rgenerated weak cation exchange resin in the alkali metal form as well as a water-soluble ammonium salt corresponding to the initial alkali metal salt.

Abstract: A process for producing potassium phosphates by ion exchange using an Advanced Separation Device (ASD) is disclosed. The process is carried out by supplying a phosphate salt solution, a washing solution and a potassium salt regeneration solution to respective fixed feed ports in periodic fluid communication with a plurality of resin-filled chambers moving about a circular path. Passage of the phosphate salt solution through potassium loaded resin forms potassium phosphates and cation loaded resin by ion exchange. After washing out residual salts, the cation loaded resin is regenerated by adding a potassium salt which loads the resin with potassium and strips it of the cation in the form of a soluble cation salt.By virtue of the ASD, potassium phosphate may be produced continuously and with greater efficiency than is possible with conventional ion exchange processes since the potassium salt and phosphate salt feed solutions may be fortified in an intra-stage fashion, i.e.

Abstract: A process is disclosed for the continuous removal of ammonia from wastewater which converts the otherwise undesirable ammonia to a commercially useful end product such as ammonium phosphate. The process is carried out in an Advanced Separation Device which comprises a plurality of chambers moving about a circular path in periodic fluid communication with a plurality of fixed feed and discharge ports. The chambers are filled with a zeolite adsorbent which effectively adsorbs the ammonium ions contained in the wastewater at low pH levels but which, when contacted with an alkaline regeneration solution, releases the previously adsorbed ammonium in the form of ammonia gas, for which the zeolite has no affinity. By virtue of the ASD design, it is possible to add acidic materials to the wastewater in an intra-stage fashion i.e. during the adsorption step so as to optimize process efficiency. Similarly, intra-stage addition of alkaline materials during the regeneration step results in increased process efficiency.

Abstract: A process for the decolorization of pulp mill process streams is described. The effluent from the process contains color bodies and organic materials, and is first fed to an acidification reactor where the pH is reduced. This causes a portion of the color bodies to precipitate. A flocculant is added to coagulate the precipitated lignins, and the solution is filtered. The filtrate then passes through a series of chambers where it is contacted with activated carbon in an advanced separation device (ASD). The regeneration of the carbon occurs simultaneously in other chambers of the ASD. The treated filtrate with significantly lower color bodies passes out of the ASD in a substantially continuous stream.