Abstract:
These resins are in particular non toxic styrene, acrylic or epoxy resins, with strong cholesterol-decreasing properties, which have an apparent density in water of 0.18 to 0.20 g of dry material/ml and a water absorption capacity of 69 to 73% by weight of the polymer weight.The process for producing anionic ion exchange resins with strong cholesterol-decreasing properties in which a mixture of monomers containing a critical percentage of cross-linking monomer, consists of polymerizing at a low rate so as to give the polymer a critically predetermined and uniformly distributed degree of cross-linkage, corresponding to an apparent density in water of 0.18 to 0.20 of dry material/ml with a water absorption capacity of 69 to 73% by weight of the polymer weight, wherein the polymerization catalyst used in an organic peroxide in a concentration of 0.2 to 3%, and the cross-linking agent used is a divinyl compound in a percentage of 1.5 to 12%, at a polymerization temperature of 50.degree. to 80.degree. C.
Abstract:
A method is disclosed for the separation of water soluble polyols. A solution containing the polyols is passed cyclically at different temperatures through a column containing ion exchange materials to separate the polyols.
Abstract:
Gelled material compositions for use as adsorbents and ion exchangers. The composition including a specific extractant, an organic solvent and a halopolymer modified by substitution with a radical of a substance compatible with the specific extractant. Optionally the composition may be in form of beads.
Abstract:
To avoid formation of toxic trihalomethanes in drinking waters disinfected with halogens, these waters are treated with fine-particle-size ion exchange resin particles, optionally in the presence of a metal salt coagulant, to remove the trihalomethane precursors prior to halogenation.
Abstract:
The invention relates to the use of a sulphated ion exchanger to selectively remove lipoproteins from blood plasma or serum. Although the attraction between sulphate groups and proteins has long been recognized it has now unexpectedly been found that cationic ion exchangers whose ion exchange capacity is provided by sulphate groups bind lipoproteins selectively in presence of other plasma or serum proteins and ions when they are equilibrated with solutions containing divalent cations and the same cation is added to the plasma or serum. Types of ion exchanger matrices and applications of the utlity are discussed.
Abstract:
A process is provided for treating spent antibiotic fermentation broth containing concentrations of up to about 12 percent fats and up to about 9.5 percent proteins which comprises acidifying such spent broth to coagulate the fats, impinging the coagulated fat on a coalescing strainer, basifying the effluent therefrom to coagulate the proteinaceous material, filtering the basified spent broth to remove the proteinaceous material, and passing the filtrate serially through anionic and cationic exchange resins, wherein the biological oxygen demand of the effluent therefrom is reduced to a level of less than 0.04 g. oxygen per liter.
Abstract:
The present invention involves a process for removing water from mixtures of alcohols and water by contacting such a mixture with an ion exchange resin of either the cation or anion type. Prior to use for alcohol dehydration, the ion exchange resin itself is dehydrated if necessary or desired by contacting it with methanol, propanol, isopropanol, acetone or other like low molecular weight hydrophilic solvents. After use for alcohol dehydration, the ion exchange resin is regenerated by contacting it with these regenerating agents.
Abstract:
The plasma proteins contained in a plasma solution thereof are chromatographically fractioned, e.g., to obtain a high purity therapeutic grade albumin product, by successively contacting said plasma solution with at least one anion exchanger and at least one cation exchanger in fixed bed chromatography columns, the contact and exchange medium of chromatography therein also comprising a plurality of at least partially hydrophobic support particulates and a plurality of hydrophilic ion exchanger support particulates.
Abstract:
A system for rapidly dewatering sludge in large quantities makes use of a filter plate that is capable of supporting heavy mechanized removal equipment without damage to the filter plate. The filter plate is monolithic and includes granular filter material that is rigidified and bonded together. In the disclosed process, sludge is pretreated with a polymer coagulant that breaks up solids and flocculates the sludge particles. The flocculated sludge is then spread on a bed of filter plates. As the bed is being filled, the large coagulated sludge particles settle and water is drawn off by gravity. A vacuum is then applied to the bed and the sludge is rapidly dewatered. Upon completion of dewatering, front end loading equipment may be used to remove the dried sludge cake from the bed.
Abstract:
A process is described for removing low density and very low density lipoproteins from blood plasma or serum and recovering the plasma or serum in a physiologically acceptable form. The method involves in a preferred embodiment passing plasma or serum through a cationic ion exchanger equilibrated with a physiologically acceptable saline solution. The ion exchanger is a water insoluble hydrophilic, water swellable cross-linked regenerated or microgranular cellulose matrix substituted with hydroxy C.sub.2 -C.sub.4 alkyl group. The ion exchanger capacity is provided by sulphate groups substituted with from 2 to 6 meq/g. The take up of low density lipoproteins is enhanced by recycling the plasma through the column.