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WO/1995/017250A1 |
The present invention provides a system and a process for removing contaminants such as CO2 and mobile cations and anions from aqueous solutions. The system and the process contemplate the use of thermally sterilizable aqueous polishing ...
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WO/1995/016730A1 |
A method for making a composite fluorinated ion exchange membrane is provided comprising applying a continuous fluorinated ion exchange polymer film to a porous reinforcing substrate, preferably made from a polyolefin such as linear high...
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WO/1995/014531A1 |
The present invention relates to particles for binding monovalent cations, in particular microcapsules, comprising a) a nucleus containing a cation exchanging material and applied thereon; b) a coating comprising a membrane being permeab...
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WO/1995/013861A1 |
A separation method comprising the steps: (i) contacting an aqueous liquid that contains a dissolved substance that is to be enriched with a polymer under conditions allowing selective partition of said substance to said polymer, whereaf...
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WO/1995/009695A1 |
The invention relates to separator materials for ion-exchange chromatography based on hydroxyl group containing base carriers on the surfaces of which polymers are covalently bonded, in which a) the base carrier contains aliphatic hydrox...
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WO/1995/009694A1 |
The invention relates to sorbents based on hydroxyl group containing base carriers for affinity chromatography on the surface of which polymers are covalently bonded, in which a) the substrate contains aliphatic hydroxyl groups, b) the c...
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WO/1995/003105A1 |
A spent aqueous alkanolamine solution used in sorbing an acid gas such as H2S or CO2 or both from a hydrocarbon stream is rejuvenated by removing inorganic ions from the spent solution (40), reacting the spent solution by heating it at a...
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WO/1995/001838A1 |
A method for producing modified activated carbon materials is provided comprising treating activated carbon material in a halogen containing atmosphere at a temperature of less than 180 �C and treating the resultant product with a nucl...
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WO/1995/000441A1 |
Amorphous derivatives of kaolin group minerals, characterised by high specific surfaces and/or high cation exchange capacities and a 27Al MAS NMR spectrum having a dominant peak at ~55 ppm relative to Al(H2O)63+. Such derivatives are pre...
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WO/1994/026684A1 |
The present invention is an improved process for the recovery of ethylene glycol from spent glycol generated in the manufacture of polyethylene terephthalate. The spent glycol typically consists of metal oxide catalyst residues, low mole...
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WO/1994/026380A1 |
The invention relates to a method for the fractionation of sulphite cooking liquor by a chromatographic simulated moving bed system in which the liquid flow is effected in a system comprising at least two chromatographic sectional packin...
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WO/1994/020214A1 |
Described is an environmentally sound method for using acid waste water with the simultaneous formation of a sorbant, the method being characterized in that acid waste water arising from clay production and containing, as the main compon...
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WO/1994/019302A1 |
A process for the production of high purity and ultrapure bisphenol-A is provided in which 4-12 mol phenol is reacted with 1 mol acetone in a multistage suspended bed reactor column (41) comprising a plurality of perforated trays (42) an...
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WO/1994/017213A1 |
The invention relates to a method for the fractionation of molasses using a chromatographic simulated moving bed system in which the liquid flow is effected in a single direction in a system comprising at least two chromatographic partia...
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WO/1994/011408A1 |
Insoluble, slightly-swelling polymers containing amino groups obtainable from popcorn polymers which contain units of structure (I), in which R, R1 = H or C1 to C4 alkyl, by the separation of the R-CO- group from at least 2 % of the mono...
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WO/1994/010091A1 |
A sorbent for removing microorganisms and inorganic and organic impurities from water is based on activated carbon and ion exchangers, and comprises: activated carbon in the form of activated carbon with hydroxyl anion exchange groups; a...
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WO/1994/006850A1 |
A novel, heterogeneous ion exchange membrane, methods for making such a membrane, and devices containing such a membrane are disclosed. Such membranes comprise linear low or linear medium density polyethylene or high molecular weight hig...
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WO/1994/006822A1 |
A method of isolating a biomolecule from a medium containing biomolecules by ion exchange wherein the ion exchange material consists of a material having ion exchanging groups which can be transformed from a charged form to an uncharged ...
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WO/1994/004271A1 |
Inorganic hydrated metal oxide and metal silicate gels are supported on the surface of particles of porous material by precipitation therein without significant deposit within pores of the support material and without encapsulating the p...
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WO/1994/003573A1 |
Alkali metal aluminosilicate of the zeolithe P type having the oxide formula M2/nO.Al2O3.(1.80-2.66)SiO2.CH2O, y being the water content, proves to have both excellent Calcium Effective Binding Capacity and Calcium Uptake Rate at tempera...
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WO/1994/003398A1 |
A process is disclosed for treating aqueous flushing solutions from zinc phosphatization processes of metallic surfaces. The solutions containing heavy metal ions are contacted with solid, strongly acid cation exchanger resins containing...
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WO/1994/002417A2 |
Removal of sodium values from sodium contaminated solids, such as red mud, is achieved by contact of a slurry of such solids with a particulate cation exchanger and occurs at an enhanced rate compared with water washing or washing with a...
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WO/1994/002240A1 |
Gelled compositions for use as adsorbents and ion exchangers. The compositions include a specific extractant, such as di(2-ethylhexyl) dithiophosphoric acid or an alkali salt thereof, an organic solvent and a halopolymer modified by subs...
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WO/1994/000215A1 |
A method and apparatus for chromatographic separations comprising a conductive-polymer stationary phase for controlled interaction with ionic species. The conductive polymer stationary phase is held at an initial voltage while analyte co...
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WO/1994/000237A1 |
An ion exchange resin comprising an ion exchange material dispersed or distributed throughout a polyurethane matrix. The ion exchange material is typically a second polymer which has been chemically modified after dispersion or distribut...
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WO/1994/000214A1 |
This invention relates generally to modified porous solid supports and processes for the preparation and use of same. In particular, passivated porous mineral oxide, polymeric, or polymer-coated mineral oxide supports are disclosed which...
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WO/1993/025592A1 |
Crosslinked copolymer beads suitable for making polymeric adsorbents and ion-exchange resins are prepared by a substantially adiabatic suspension copolymerization of at least one monoethylenically unsaturated monomer with at least one po...
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WO/1993/022094A1 |
An ion exchange treatment method in the production or regeneration of an aqueous electrical discharge machining fluid, wherein untreated water is forced into a column (4) packed with an ion exchange resin and is passed through the resin ...
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WO/1993/018437A1 |
The present invention provides methods for producing photoresist compositions having a very low level of metal ions, utilizing specially treated ion exchange resins. A method is also provided for producing semiconductor devices using suc...
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WO/1993/013855A1 |
Mineral aluminosilicates are pretreated by dry heating, for ion-exchange separation of diverse cationic materials, such as recovery of ammonium or monovalent amine from waste-water also containing divalent alkaline earth materials. A hyd...
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WO/1993/012882A1 |
An ion exchange resin for extracting metal ions from a liquid waste stream. An ion exchange resin is prepared by copolymerizing a vinylidene disphosphonic acid with styrene, acrylonitrile and divinylbenzene
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WO/1993/012201A1 |
Process for removing mercury from an organic medium which at least contains mercury and arsenic, wherein the organic medium is contacted with a solid polymeric substrate containing thiol groups bound to the polymeric substrate through al...
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WO/1993/006923A1 |
A method for the removal and concentration of desired ions such as Sb3+, Zr4+, Zn2+, Pu4+, Hf4+, Cu2+, Ni2+, Fe3+, Cd2+, Ag+, and Hg2+ from a multiple ion source solution which may contain larger concentrations of other undesired ions in...
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WO/1993/003841A1 |
An ion exchanger comprising a composite having a degree of swelling in water of 2 to 7 ml/g of resin, said composite being prepared by holding a cross-linked gel, which comprises a hydrophilic natural macromolecule having a three-dimensi...
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WO/1992/015397A1 |
Ligno-cellulosic type vegetable substrate characterized by a quantity of lignin exceding 10 % dry weight of the ligno-cellulosic material. The substrate is also characterised by the distribution in phenolic compounds of the extracts of t...
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WO/1992/011088A1 |
An ion exchanger for chromatographic separation has the structure P - S - A, wherein P is an insoluble support, S is a spacer, and A is a functional ligand. According to the invention the functinal ligand A comprises two positively charg...
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WO/1992/010292A1 |
A process for the removal of heavy metals such as lead, cadmium, zinc, chromium, arsenic and mercury from aqueous solutions containing one or more of said metals as well as competing ions such as calcium and/or magnesium by contacting sa...
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WO/1992/009889A1 |
A process for preparing a carrier suitable for use in a cation exchange liquid chromatography, which comprises a step of providing a hydrophobic particle having a polymerization initiator adherent thereto, and a step of adding a polymeri...
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WO/1992/006918A1 |
Purification of aqueous hydrogen peroxide solutions using conventional ion-exchange techniques can result in the hydrogen peroxide decomposing explosively. Much safer processes are obtained by restricting the contact between the resin be...
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WO/1991/018833A1 |
A crystalline molecular sieve is disclosed having both at least one octahedrally coordinate metal and at least one tetrahedrally coordinated metal in its framework.
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WO/1991/017830A1 |
A cross-linked flexible sponge adsorbent medium containing substantially uniformly distributed fibrous reinforcement is prepared under such conditions that swelling of the sponge is controlled to a water retention value of 2 to 6; and si...
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WO/1991/012061A1 |
A liquid filter (11) has a housing (13) with a bottom and a top (17). A vertical partition (27) divides the housing into an inlet chamber (29) on one side and outlet chamber (43) on the other side. One type of filtration material is loca...
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WO/1991/011241A1 |
Disclosed are pellicular materials useful in contact with proteins and as chromatography media. Rigid, inert, hydrophobic, polymeric materials are exposed to a solution comprising a solute defining plural interspersed hydrophobic and hyd...
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WO/1991/009891A1 |
A phenolic, cesium-specific, cation exchange resin is prepared by neutralizing resorcinol with potassium hydroxide, condensing/polymerizing the resulting intermediate with formaldehyde, heat-curing the resulting polymer to effect cross-l...
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WO/1991/004948A1 |
A process for enhancing the selectivity of a zeolite, such as clinoptilolite, for ammonium ion versus other cations such as calcium. The zeolite is heated to a temperature and for a period of time sufficient to increase the selectivity o...
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WO/1991/001805A1 |
Liquid compositions of perfluorinated ion-exchange polymers are disclosed along with processes for making such compositions, use of the compositions in preparing supported polymers, and use of the supported polymers in hydrocarbon conver...
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WO/1990/011829A1 |
Process and medium for treating liquids, particularly aqueous liquids, with a view to eliminating undesirable substances in particular, such as manganese and uranium and radium ions, by percolation of the liquid on said means, which is a...
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WO/1990/011825A1 |
An ion-exchange media comprising a modified polysaccharide material and a modified silica or a modified particulate polymeric material, said modified materials comprising a polysaccharide and particulate polymeric materials covalently bo...
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WO/1990/011143A1 |
The invention relates to an environment-protective agent consisting of silicon-containing minerals for adsorbing radioactive metal isotopes and toxic heavy metals, which comprises as silicon-containing minerals with a particle size of 0....
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WO/1990/010873A1 |
The invention relates to a citrate free and chloride-free buffer and reagent system for the separation of amino acids and other ninhydrin-positive components of cation exchangers and their quantitative determination. The buffer and reage...
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