Abstract:
Described herein are processes and apparatus for the high purity and high concentration recovery of multivalent products via continuous ion exchange from aqueous solutions for further down-stream purification.
Abstract:
A device is provided for performing chemical transformation in a fluid, with a flow distributor having at least one fluid medium inlet, at least one fluid medium outlet, and at least one confinement wherein the chemical transformation is performed; and a means for rotating, rocking, wagging, or oscillating the device. At least one confinement may be equipped with a provision for providing heat, cooling, sound, light or other types of radiation, such provision being contacted to an external source through an actuator shaft. The flow distributor may be provided with sectors connected with the centrally located fluid medium inlet and a designated peripheral fluid medium outlet. The means for rotating, rocking, wagging, or oscillating the device may be an element producing magnetic fields or a shaft mechanically connected to an external actuating device.
Abstract:
A continuously flowing, inner circulatory, quasi-fluidized-bed reactor for resin ion exchange and adsorption. The reactor comprises a main body casing, an inclined pipe separator, an outlet weir, an inlet pipe, an outlet pipe, a reducing fluidization tank, a guide plate, a resin regeneration tank, a resin discharge pipe, and a return pipe for regenerated resin and a distributing ejector. The reactor is particularly suitable for advanced treatment of supply water, wastewater, biochemical effluent and reclaimed water by using (magnetic) powder resin.
Abstract:
An apparatus and method permit continuous separation of an adsorbate from a processing material containing solid particles, sticky substances and water-soluble proteins, alone or in combination, without pretreatment. The processing is carried out while a loop adsorbent is circulated. An adsorbate is adsorbed, not by supply of the processing solution through the adsorbent, but by contact thereof with the adsorbent. In addition, the adsorbent after desorption of the adsorbate is cleaned. As a result, the apparatus and the method achieve continuous processing and separation of the adsorbate even from a processing material containing solid particles, sticky substances and water-soluble proteins alone or in combination without pretreatment.
Abstract:
A microfluidic reactor has a reaction chamber which is configured as an annular channel. It is provided that segments have been formed in the annular channel such that a sequence of inlets and outlets (allows an alternation between the process fluids (A and B) to take place. Furthermore, particles which circulate in the annular channel and can be used, for example, for the adsorption and desorption of ions may be provided in the annular channel. In this way, the ions concerned can, for example, be extracted from the process fluid (A) and transferred into the process fluid (B). In a method, the reactor can be used for example for the purpose of obtaining 18F− ions from water enriched therewith and feeding them to a solvent such as acetonitrile. In the further course of the method, the 18F− ions can be used for producing a radiopharmaceutical (for example FDG).
Abstract:
A novel process for water demineralization involving the use of separate beds of weakly acidic cation exchange resin, weakly basic anionic exchange resin and a third column of weakly acidic cationic exchange resin. The first column of cation resin is buffered with a suitable base such as ammonia or an amine. When the saline feed is passed through the system, the cations of the feed are exchanged for the buffer, releasing buffered salts. The buffered salts when passed through the anion exchange column are split, releasing the buffer that is then deposited on the third cation resin column. The latter column is then used as the first separate bed during the next demineralization cycle. Thus, the buffer is internally looped, preventing contamination and also resulting in a saving of feed chemical. This process allows the efficient use of weak cation and anion exchange resins in a separate fixed-bed configuration. The process is adaptable to deionizing brackish water and tertiary waste water from sewage plants, to remove water soluble ions.