Abstract
Publisher Summary This chapter discusses several other applications of hypercrosslinked polystyrene. The extraction of rhenium by impregnated hypercrosslinked sorbents is discussed. The consumption of rhenium has been rapidly growing due to its increased use in superalloys in the aircraft and spacecraft industries, and also as platinum–rhenium catalysts in the production of lead-free high-octane gasoline. Rhenium has been isolated from diluted sulfuric acid solutions of mixed salts obtained on hydrometallurgical processing of polymetallic rhenium-containing raw materials. The extraction has been conducted by means of special sorbents that are selective to this metal. Later, the heterogeneous membranes filled with hypercrosslinked polystyrene are reviewed. Separation of gases and vapors by means of selective permeable membranes belongs to the progressive modern technologies that successfully compete with gas separations by adsorption on porous solids. To compare the influence of different polymer fillers on the properties of heterogeneous membranes a set of composite membranes containing fine particles of conventional macroporous resins or hypercrosslinked polystyrene adsorbing materials in films of poly (2,6-dimethyl-1,4-phenylene oxide) as a binder is prepared. Further, these heterogeneous membranes show that they are superior in gas permeability to the homogeneous ones made of the binder alone.
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