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WO/1999/010527A2 |
The invention relates to a method for isolating anionic organic substances from aqueous systems using polymer nanoparticles with cationic pH-sensitive surface groups. Extraction can be carried out directly from diluted solutions, biologi...
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WO/1999/006133A1 |
A method for separating acid and sugars obtained from liquids resulting from the acid hydrolysis of a material containing at least one of cellulose and hemicellulose is disclosed, comprising adding the liquids to a separation unit compri...
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WO/1998/057672A2 |
A process is disclosed for reducing the concentration of viral and molecular pathogens in a biological material which contains one or several biological substances to be extracted. The biological material is mixed with an organic solvent...
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WO/1998/056504A1 |
A process based on ion exchange with separated beds is disclosed for the deionization of substances that are not stable in the presence of strongly acidic cation exchangers, wherein the solution to be deionized is contacted with a first ...
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WO/1998/054087A1 |
The invention concerns a method for preparing an ultrapure hydrogen peroxide solution, characterised in that it comprises a sequence which involves successively passing said solution on at least four beds of cation-exchanging adsorbents ...
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WO/1998/054085A1 |
The invention concerns a method for preparing an ultrapure hydrogen peroxide solution, characterised in that it comprises at least a sequence which involves passing the solution to be purified, on at least a bed of anion-exchanging adsor...
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WO/1998/054086A1 |
The invention concerns a method for preparing an ultrapure hydrogen peroxide solution, characterised in that it includes at least a sequence which involves successively passing the solution to be purified on at least a bed of cation-exch...
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WO/1998/054088A1 |
The invention concerns a method for preparing an ultrapure hydrogen peroxide solution characterised in that it comprises at least one sequence which involves successively passing the solution to be purified on at least a bed of ion-excha...
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WO/1998/051619A1 |
A process for the separation of pentavalent arsenic from an aqueous solution using an N-alkyl pyridinium-containing adsorption medium is disclosed. An oxidizing medium and process for the oxidation of trivalent arsenic to pentavalent ars...
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WO/1998/043719A1 |
A process for removing contaminating levels of selenium from a contaminated aqueous solution is disclosed. That process includes providing a vessel or flow-permissive container containing a water-insoluble polymeric adsorption medium hav...
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WO/1998/041301A1 |
The invention concerns a fluid-treatment device wherein the fluids flow through a porous web material. The device comprises a housing which has a fluid inlet and a fluid outlet that are separated from each other by at least one layer of ...
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WO/1998/040145A1 |
A system and method for electrochemically regenerated ion neutralization and concentration is disclosed. In one aspect of the invention, a system is provided including an HPLC column pump (1), a concentrator column (2), an analytical col...
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WO/1998/039367A1 |
In accordance with the present invention, an improved anion-exchange chromatographic composition has been formed which comprises synthetic resin support particles and anion exchange compounds attached thereto, wherein the anion-exchange ...
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WO/1998/037940A1 |
A method for purifying polymers is disclosed and claimed. The method is generally directed to facilitated ion exchange wherein a complexing agent is added to a polymer solution prior to contacting the solution with an ion exchange resin.
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WO/1998/032512A1 |
A process for removing contaminating levels of hexavalent chromium ion [Cr(VI)] from a concentrated aqueous solution of sodium sulfate. That process includes providing a vessel containing a water-insoluble adsorption medium having a plur...
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WO/1998/032513A2 |
A method for separating ?213�Bi from a solution of radionuclides wherein the solution contains a concentration of the chloride ions and hydrogen ions adjusted to allow the formation of a chloride complex. The solution is then brought i...
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WO/1998/030314A1 |
A method and apparatus for generating an acid or base eluent in an aqueous stream solely from an ion exchange bed for liquid chromatography of anions or cations and for simultaneously suppressing conductivity of the eluent in the ion exc...
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WO/1998/023375A1 |
The invention provides a method and an apparatus for altering the pH of a solution composition. The pH altering apparatus has a container body having a solution retaining chamber and an outlet, and a pH changing device having a modified ...
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WO/1998/022517A1 |
Anion exchange material surfaces are provided with zwitterionic and cationic groups, preferably by coating with a polymer formed from monomers including a zwitterionic monomer, a cationic monomer and, optionally, a termonomer providing s...
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WO/1998/022162A1 |
Substrate surfaces are provided with zwitterionic and cationic groups, preferably by coating with a polymer formed from monomers including a zwitterionic monomer, a cationic monomer and, optionally, a termonomer providing stable binding ...
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WO/1998/022516A1 |
A polymer is formed from monomers including a zwitterionic monomer, a cationic monomer and a hydrophobic termonomer. The polymer may be cross-linkable. The polymer may be coated onto a surface from a liquid coating composition followed b...
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WO/1998/022217A1 |
A polymeric material which has such a high resistance to oxidative decomposition that it is less apt to suffer the performance decrease caused by oxidative deterioration and to cause water pollution by oxidative decomposition products du...
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WO/1998/017586A1 |
Water recovered from the polymerization of vinyl monomers can be treated to remove or deactivate chain transfer agents present in the water allowing reuse in polymerization processes. The water recovered from a vinyl polymerization react...
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WO/1998/005686A1 |
A method for the purification or recovery of immunoglobulins from plasma or other immunoglobulin-containing material, comprises subjecting the plasma or other immunoglobulin-containing material to chromatographic fractionation on a macro...
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WO/1998/000524A1 |
The invention concerns a method for producing recombinant adenovirus by which viral DNA is introduced in a packaging cell culture and the viruses produced are harvested after liberation in the supernatant. The invention also concerns the...
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WO/1997/048482A1 |
The present invention provides media for inactivating pathogens found within protein-containing biological fluids. The media of the present invention preserve the structural integrity and biological activity of labile proteins while simu...
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WO/1997/047382A1 |
An adsorbant composition containing a modified carbonaceous material capable of adsorbing an adsorbate is disclosed, wherein at least one organic group is attached to the carbonaceous material. Furthermore, methods to increase the adsorp...
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WO/1997/044110A1 |
A 99Mo/99mTc generator system includes a sorbent column (11) loaded with a composition containing 99Mo. The sorbent column (11) has an effluent end (31) in fluid communication with an anion-exchange column (15) for concentrating 99mTc el...
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WO/1997/031864A1 |
Anion-exchange compositions are provided comprising anion-exchange functional groups comprising at least a first and a second nitrogen group, wherein the first nitrogen group is a quaternary amine and the second nitrogen group is selecte...
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WO/1997/031692A1 |
A method of preparing a liquid mixture of controlled pH comprising (i) one or more buffering species, (ii) an acid or alternatively a base, (iii) optionally a salt; and (iv) a solvent wherein the proportions of the different components (...
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WO/1997/031865A1 |
Borate-binding compositions are provided comprising polymers containing covalently attached borate-binding carbohydrates. Methods of making and using the compositions are also provided.
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WO/1997/029825A1 |
Process for separating off a peptide or a nucleic acid by an anion exchanger (I) characterized in that a) the anion exchanger (I) exhibits ligands, which (i) contain a primary, secondary or tertiary amino group and (ii) are covalently bo...
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WO/1997/028090A1 |
Filter for purification of drinking water is designed for purification of both natural and tap water from chemical contaminants employing sorption methods based on using a mixture of strongly alkaline carboxyl catex in the form of H+ who...
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WO/1997/014658A1 |
An improved two-stage process for purifying cyanide-containing effluent. At the first treatement stage the effluent and microorganism culture in an amount between 0.6- to 1.0 g/l are introduced into a chamber, and the mixture is agitated...
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WO/1997/003743A1 |
A method and system for improved continuous ion exchange chromatographic elemental separations of zirconium and hafnium and also for isotopic separations thereof from crude zirconium minerals by using zirconium (also containing hafnium) ...
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WO/1997/004141A1 |
A method and system for improved ion exchange chromatographic elemental separations of zirconium and hafnium elements and also, if desired, separations of the isotopes thereof from crude zirconium minerals by using improved crude aqueous...
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WO/1996/040619A1 |
N-alkyl polyhydroxy alkyl amines such as N-methyl glucamine having a Gardner Color of less than 1 are reacted with sources of fatty acyl groups such as methyl esters, anhydrides, and/or fatty acids that have greater than 98 % transmittan...
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WO/1996/040803A1 |
Anion exchange resins including at least two positively charged sites and a well-defined spacing between the positive sites are provided together with a process of removing anions or anionic metal complexes from aqueous solutions by use ...
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WO/1996/028251A1 |
A process for the selective removal of ions from dispersion of solids in solutions and which also relates to coarse open cell polymeric foams which support ion exchange sites. The process for the selective removal of ions from a solution...
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WO/1996/027555A1 |
A method for producing a crystalline, inorganic ion exchange material having the following composition: x1K2O . x2Na2O . ySiO2 . zMeO, wherein x1, x2, y and z are numerical values satisfying the following relationships: y/(x1 + x2) = 1.0...
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WO/1996/026971A1 |
Anion-exchanging moulded bodies and a method of manufacturing the same. The aim is to find anion-exchangers which can be produced in any shape simply, cheaply and reproducibly, without the use of carcinogenic chloromethyl ethers. It has ...
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WO/1996/026007A1 |
A process for removing thiocyanate and other anions from Type II strong base anion exchange resins with an alkali metal hydroxide is disclosed. The process is particularly beneficial to the regeneration and/or reclamation of alkanolamine...
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WO/1996/023727A1 |
A process is proposed for the production of highly pure hydrotalcites by the reaction of alcohols or alcohol mixtures with at least one or several divalent metals and at least one or several trivalent metals and the hydrolysis of the alc...
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WO/1996/022153A1 |
Acids contaminated with multi-valent metal salts are purified by a process which involves treatment in an acid sorption unit (ASU) and a nanofiltration unit (NFU). The feed solution can first be delivered to the ASU, which produces two s...
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WO/1996/017805A1 |
The invention in essence concerns a process for producing demineralised sterile water from drinking water. The process is characterised by the fact that the drinking water is drawn through a strongly acidic monospherical cation exchanger...
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WO/1996/012730A1 |
A method for the separation of hydrophobic amino acids and peptides containing aromatic groups from protein hydrolysates by the use of anion exchange media at substantially neutral pH and the regeneration of the media for further use.
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WO/1995/033553A1 |
The present invention relates to porous crosslinked polymeric microbeads having cavities joined by interconnecting pores wherein at least some of the cavities at the interior of each microbead communicate with the surface of the microbea...
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WO/1995/030467A1 |
A functionalized macroporous poly(styrene divinylbenzene) particle comprises at least one ionic functional group covalently bonded thereto, the functionalized particle having sorptive capability towards an analyte, said functional group ...
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WO/1995/029754A1 |
A method is disclosed for controlling the coupling of low molecular weight ligands to activated sites on a support in competition with a quencher of the activated sites. Derivatized supports produced by the method have optimal ligate bin...
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WO/1995/023885A1 |
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 to form a cellulose solution which can be sh...
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