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WO/1995/023827A1 |
The invention relates to a process for producing cellulose shaped bodies, said process comprising the following steps: (A) dissolving cellulose in an aqueous solution of a tertiary amino oxide, in particular N-methylmorpholine-N-oxide (N...
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WO/1995/021179A1 |
A process is disclosed for reducing or removing endotoxins from compositions containing therapeutic active substances extracted from natural sources by genetic engineering and/or biotechnology. For that purpose, the compositions are trea...
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WO/1995/021177A1 |
A process is disclosed for isolating and purifying nucleic acids and/or oligonucleotides for gene therapy. The nucleic acids and/or oligonucleotides are isolated or purified from a substantially biological source. The process is characte...
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WO/1995/017955A1 |
Adsorption material, preferably substantially spherical, wherein support particles having cellulose capable of binding charged particles such as proteins, are distributed over the exterior surfaces thereof, and a method for generating su...
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WO/1995/017251A1 |
The present invention provides a process and a system for removing inorganic carbon in the form of free and dissolved CO2 from aqueous solutions. The process and the system contemplate the use of a thermally regenerable and optionally th...
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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/1995/003105A1 |
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/1994/023099A1 |
In the preparation of poly(m-phenylene isophthalamide) filaments, hydrogen chloride is removed from as-produced amide solution of poly(m-phenylene isophthalamide) by contact with basic ion exchange resin.
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WO/1994/018127A1 |
A method of manufacturing ultrapure water having a very low concentration of organisms, consisting of the steps of thermally decomposing raw water under acidic conditions having pH of not more than 4.5 and in the presence of an oxidizer ...
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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/1994/006296A1 |
The present invention relates to iodine demand disinfectants. It relates in particular to a process for preparing a polyiodide-resin for use as a iodine demand disinfectant wherein a porous strong base anion exchange resin in a salt form...
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WO/1994/005724A1 |
Novel porous copolymers are disclosed which can be used to prepare ion-exchange resins and polymeric adsorbents. The copolymers comprise a copolymer of at least one monovinylidene monomer and a crosslinking monomer and have a unique cell...
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WO/1994/003503A2 |
A fluoroorganic polymeric material which comprises a polymeric chain and at least one group pendent from the polymeric chain, in which the group pendent from the polymeric chain comprises at least one ion-exchange group or group converti...
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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/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/1993/017972A1 |
A method of recovering volatile acids and a method of treating wastewater utilizing the above method, the recovery method comprising bringing a waste liquid containing volatile acids into contact with an amine boiling at 50 °C or above ...
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WO/1993/012167A1 |
The invention concerns preparation of porous copolymer beads by a seeded polymerization process employing gel copolymer seed particles. The process comprises initially providing a plurality of gel-type copolymer seed particles prepared b...
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WO/1993/011218A1 |
Described is a method of isolating cell components, such as nucleic acids, from natural sources by filtering a sample of the digested natural sources such as cells or cell fragments. The method is characterized in that the sample is pass...
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WO/1993/010899A2 |
A novel biocompatible anion exchange membrane is prepared by reacting the hydroxyl groups of a chromatographic support material, the support material is comprised of a blend of 45 % polyester and 55 % cellulose, with a solution containin...
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WO/1993/011287A1 |
Aqueous solutions of an amine N-oxide such as N-methyl morpholen N-oxide used in the manufacture of regenerated cellulose can be purified by passage through a strongly basic anion-exchange resin. The resin is regenerated by treatment wit...
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WO/1993/011071A1 |
A method of producing an alkali metal carbonate, e.g. sodium carbonate, comprises passing a solution or suspension of the alkali metal chloride and bicarbonate over an ion exchange resin which is chloride retaining and has a basicity gre...
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WO/1993/011221A1 |
The description relates to a process for isolating and purifying nucleic acids like plasmide or genomic DNA from cells or other sources in which: a) the cells containing nucleic acid are disinte grated and the cell fragments removed or o...
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WO/1993/003048A1 |
A process for chromatographically isolating pentostatin from a crude concentrate which comprises applying the concentrate to a strongly basic borate anion exchange resin followed by application to an activated bed of Sepabeads SP207, or ...
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WO/1992/021419A1 |
A method for the removal, separation, and concentration of Rh, Ir, and/or Ru from a source solution which may contain larger concentrations of other ions including H+ comprises bringing the source solution into contact with a compound co...
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WO/1992/016490A1 |
Described are preferred processes for recovering citric acid from a medium in which it is contained. The citric acid is recovered both effectively and in a form which is readily purifiable. In one preferred process, the citric acid-conta...
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WO/1992/015528A1 |
The present invention relates to a method for removing and/or recovering mercury from natural water or wastewater contaminated with mercury, characterized in that the method comprises the steps of: (a) extracting the mercury from the nat...
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WO/1992/011933A1 |
A method of derivatizing a chromatography matrix having a hydrophobic surface. The technique involves reacting the hydrophobic surface with a halosulfonating agent to produce a significant amount of halosulfone groups covalently bonded o...
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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/1992/009786A1 |
A method of increasing the capacity of aqueous solvents for alkaline earth metal sulfates by removing sulfate ions from the solvent solution with an anion exchange resin.
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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/1991/011241A1 |
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/1991/004791A1 |
In order to remove e.g. nitrate from water with a short contact time, the water is mixed with small particles of ion-exchange resin in a tank (1), to form a suspension of a concentration of 1.25 to 5 % w/w. The particle mesh size is e.g....
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WO/1991/000778A1 |
The present invention relates to an ion exchange device for purifying water or improving its quality, and preferably reducing the nitrite and/or nitrate content, consisting of at least one exchange container with a basic anion exchanger ...
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WO/1991/000145A1 |
Anion exchangers for chromatographic separation, containing two positive charges at a distance of two atoms from each other. The invention contemplates in particular anion exchangers containing two quaternary amino groups.
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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/1990/011674A1 |
Diclosed is a process for removing selenium from wastewater effluent. The process includes the steps of: (i) contacting a selenide containing wastewater and a strong-base anion exchange resin to absorb selenide on the resin; (ii) eluting...
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WO/1990/010500A1 |
A novel anion exchanger, particularly an anion exchanger having excellent heat resistance, and a method for treating fluid using it are disclosed. The anion exchanger has functional groups represented by chemical formula (I) and the meth...
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WO/1990/005588A1 |
A method of preparing low chloride strong-base anion exchange resin is disclosed. The method involves a two-step amination of the haloalkylated copolymer beads at temperatures below 60�C.
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WO/1990/005114A1 |
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 a...
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WO/1989/011321A1 |
A method and apparatus for purifying hydrofluoric acid, comprising the steps of filtering the hydrofluoric acid to remove particulates (30), passing the filtered acid through a cation exchange material (14) and an anion exchange material...
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WO/1989/009651A1 |
Porous fine cellulose particles advantageously usable as fine particles of ion-exchange cellulose and affinity carriers, and a process for their production are disclosed. The fine particles have such an excellent pressure resistance that...
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WO/1989/009643A1 |
A crosslinked cellulose has been developed which retains the highly rigid structure of cellulose upon chemical derivatization in aqueous solution and at high pH and ionic strength. The method of this invention involves a cross-linking pr...
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WO/1989/008718A1 |
A process for decolorizing an aqueous sugar solution by contacting the solution with an adsorbent resin, wherein the adsorbent resin is a macroporous copolymer being post-crosslinked in a swollen state in the presence of a Friedel-Crafts...
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WO/1987/006492A1 |
A new class of chromatographic columns for reverse phase and ion exchange chromatography based on organotitanate coupling along with separation processes using such media. The disclosed organotitanate coupled matrices useful for reverse ...
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WO/1987/004369A1 |
Process for the preparation of ion exchange resins of even grain size for analytical and preparative purposes. The process comprises in polymerizing a mixture of styrene and divinyl benzene in the presence of peroxide catalyst and protec...
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WO/1987/000072A1 |
A process for removing cyanide from a dilute cyanide solution. The solution is passed through a weak base anion exchange resin to adsorb cyanide complexes. The resin is eluted with a weakly basic Ca(OH)2 solution, to produce a cyanide-ri...
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WO/1986/004486A1 |
High-recovery, high-resolution method of purifying antihemophilic factor VIII:C (''AHF'') by using column chromatography techniques in the presence of sugars, polyhydric alcohols, amino acids, or salts. The AHF preparations obtained by t...
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