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.
Abstract:
A process for the neutralization, clarification and decolorization of organosilanes or organosilicones derived from the reaction of an organosilane or a hydropolysiloxane with an aliphatically unsaturated compound in the presence of an acidic platinum catalyst, a process for the conversion of a soluble platinum catalyst into an insoluble form and a process for the recovery of a platinum catalyst from an insoluble anion exchange resin which comprises:(a) contacting a reaction mixture of the organosilane or organosilicone with a basic anionic exchange resin having a free amino or quaternized ammonium salt functionality in an insoluble polymeric matrix under conditions suitable to bind the soluble platinum catalyst to said resin;(b) separating said resin containing bound platinum catalyst from the organosilane or organosilicone reaction mixture and, optionally,(c) treating the separated resin with an inorganic base to convert the bound platinum catalyst to a recoverable salt or(d) subjecting the resin containing bound platinum catalyst to combustion to recover elemental platinum.
Abstract:
A granular product to be dosed is introduced at the same time as a transfer liquid into a dosing chamber below a retaining grid, provided in the upper part thereof. The measurement of the pressure upstream of the dosing chamber makes it possible to detect the arrival of the product level with the grid and to stop the introduction thereof. An inverted U-shaped pipe forming a syphon then ensures the transfer of the dosed product into a tank, when the compressed air is injected into the dosing chamber above the grid.
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 novel ion exchange agent comprises a magnetically susceptible core or nucleus surrounded by a coating of plastic or resin ion exchange material, preferably a microreticular coating immediately surrounding the magnetically susceptible core and a macroreticular coating surrounding the microreticular coating and a novel method of preparing the same. A novel ion exchange process is disclosed, including applying a magnetic field to the body of the magnetically susceptible ion exchange agent to at least temporarily immobilize the ion exchange agent while passing liquids therethrough, particularly in the washing or other treatment of ground ores to recover mineral values therefrom in a resin-in-pulp process. Another aspect of the present invention relates to a novel method of recovering mineral values from ores, particularly uranium-containing ores wherein the ground ore is simultaneously contacted with a leach solution adapted to remove mineral values from the ore and a liquid or solid ion exchange agent adapted to remove the mineral values from the leach solution by ion exchange.
Abstract:
A technique for contacting a fluid with an ion exchange resin which comprises flowing the contacting fluid through a moving bed of ion exchange resin in a direction essentially perpendicular to the direction of flow of said ion exchange resin bed.
Abstract:
In a continuous liquid-solid contacting process with intermittent counter-current movement of particles between horizontally adjacent vessels, particle movement is effected by flowing liquid upwardly from a lower region of one vessel through a particle collection conduit into a lower region of an adjacent vessel. The sides of the vessel converge downwardly adjacent the inlet end of the conduit to a collection zone from which the particles can be transferred efficiently. A novel form of vessel for use in apparatus for carrying out the process is also disclosed.
Abstract:
To permit the output of a vertical fluidizing-cell column to be increased, its cross-sectional area to be enlarged, and the installation of plates in the column to be simplified, the plates are made conical or pyramidal with their concave and convex sides alternately directed upwardly. The plates have central openings for the passage of one stream of material, and are mounted in the column with peripheral passages for another stream of material. Preferably the plates are movable relative to each other and have movable center pieces variably closing some of the central openings for varying the operation of the column.
Abstract:
The direction of circulating fluid flow in a closed loop simulated moving bed process is periodically reversed within a selected portion of the bed while maintaining normal flow throughout the remainder of the loop. Each selected portion is contained within a discrete vessel, and at preselected times, flow is reversed in each vessel in turn so that during a complete cycle of the process the entire bed is backwashed for an interval sufficient to avoid compaction.
Abstract:
Exchange-discharge bodies provided with reactive material, especially for ace-material concentration from large water masses. The exchange bodies comprise a mechanically stable outer contour, and have a fluid accessible reactive upper surface protected against mechanical access by adjacent bodies.