| Document |
Document Title |
|
WO/1999/040033A1 |
An ion exchange separation, recovery and regeneration process for the control of iron is disclosed that can replace the conventional bleed stream process used in copper electrowinning. The disclosed process minimizes the loss of cobalt f...
|
|
WO/1999/038595A1 |
Method and apparatus for generating an acid or base, e.g., for chromatographic analysis of ions. For generating a base, a cation source, such as a salt, cation hydroxide or cation exchange resin, is provided in a cation reservoir (10) se...
|
|
WO/1999/037628A1 |
A method for first recovering melamine alone from a waste liquor obtained in a melamine production process by the urea method, and then further recovering ammeline and ammelide (hereinafter referred to as ammeline, etc.) therefrom. This ...
|
|
WO/1999/036358A1 |
The present invention provides a continuous process for the conversion of sodium silicate to silicic acid, wherein a moving bed of a protonated ion exchange resin is contacted with an inlet stream of sodium silicate to provide an outlet ...
|
|
WO/1999/034843A1 |
Disclosed in the present application are absorbent polymer compositions useful in the absorption of body fluids such as urine, menses and the like. In particular, the invention relates to mixed-bed ion-exchange absorbent polymer composit...
|
|
WO/1999/034021A1 |
The present invention relates to a method of producing xylose by chromatographic separation of the xylose from a sulphite cooking liquor containing for example xylose and xylonic acid. The xylose yield of the separation is affected by th...
|
|
WO/1999/033452A2 |
The present invention relates to polymer compositions and methods of using said compositions for sequestering bile acids in a patient. The polymer compositions of this invention comprise a copolymer characterized by one or more hydrophil...
|
|
WO/1999/025449A1 |
An activated carbon-crystalline titanium and/or tin silicate composite for purifying waste streams and method of making. The method involves providing a combination of a synthetic carbon precursor, and titanium and/or tin silicate, follo...
|
|
WO/1999/022933A1 |
A process for removing ions of dissolved heavy metals and complex heavy metals comprises providing a treatment zone in which is contained an extraction material having an activated surface that has an affinity for heavy metal ions and co...
|
|
WO/1999/020393A1 |
The invention relates to a method for separating specific groups of elements, especially groups of various metals and semi-metals, from aqueous solutions using ion-exchange membranes. According to the invention, three groups comprising a...
|
|
WO1998016462A9 |
A process employing a fixed-resin bed Acid Retardation Unit (ARU) to separate spent acid from chlorine dioxide generators into a de-acidified sodium sulfate component and a purified sulfuric acid component. The de-acidified sodium sulfat...
|
|
WO/1999/015273A1 |
An ion exchange material comprising a superabsorbent polyurethane foam having an ion exchange medium contained therein. The ion exchange may be used in a process for the extraction of metal anions and cations from solutions and/or slurri...
|
|
WO/1999/013116A1 |
Processes for the recovery of gold and/or silver from lixiviant solutions include a preliminary step of: (a) contacting the lixiviant solution with ion exchange resins containing amine functionality, optionally dispersed or distributed w...
|
|
WO/1999/013115A1 |
The invention relates to a method for reprocessing materials containing precious metals especially from metallurgic primary concentrates in which the materials are subjected to an increased temperature in the sequence of an oxidized trea...
|
|
WO/1999/011351A1 |
Method and apparatus are provided for electrochemically generating an acid or base eluent in an aqueous solution and for simultaneously suppressing conductivity of the eluent in an ion exchange bet (30) after chromatographic separation i...
|
|
WO/1999/010278A1 |
A method comprises the step of spray-drying a solution or slurry comprising (alkali metal or ammonium) (metal) hexacyanoferrate particles wherein said metal is selected from Fe, Ru, Os, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, and Hg in a...
|
|
WO/1999/006145A1 |
The present invention relates to a process for preparing a microcomposite comprising a highly fluorinated ion-exchange polymer containing pendant sulfonate functional groups, said polymer existing as aggregated particles entrapped within...
|
|
WO/1999/004903A1 |
A separation process for isolation and purification of useful nutrients from food process streams is described. The process includes the steps of contacting an aqueous solution including a nutrient and divalent ions with an ion exchange ...
|
|
WO/1999/003576A1 |
A chemically modified mica composite formed by heating a trioctahedral mica in an aqueous solution of sodium chloride having a concentration of at least 1 mole/liter at a temperature greater than 180 degrees Centigrade for at least 20 ho...
|
|
WO/1999/004269A1 |
A high speed method is described for analyzing a plurality of individual blood samples to determine characteristics therein indicative of hemoglobin variant(s), while also quantifying the amounts of important A¿2? and F hemoglobins th...
|
|
WO/1999/002255A1 |
The invention concerns a composite solid material fixing polluting minerals, based on metal hexacyanoferrate, characterised in that it comprises a solid support coated with an anion-exchanging polymer film to which is fixed an insoluble ...
|
|
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 ...
|
|
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 ...
|
|
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...
|
|
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...
|
|
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...
|
|
WO/1998/053911A1 |
This invention concerns a modified porous microcomposite comprising a perfluorinated ion-exchange polymer entrapped within and highly dispersed throughout a network of inorganic oxide wherein the network and optionally the pendant groups...
|
|
WO/1998/050307A1 |
Molecular sieves (often loosely termed microporous materials) contain an actinide in combination with atoms selected from the group consisting of oxygen, fluorine, phosphorus, transition metals and mixtures thereof. The molecular sieve m...
|
|
WO/1998/046350A1 |
The invention relates to sorption agents for affinity chromatography on the basis of base carriers containing hydroxyl groups, polymers being covalent-bonded on the surfaces of said base carriers. According to the invention, the base car...
|
|
WO/1998/044344A1 |
A liquid chromatograph and a packing material column which have effective concentration effects and high separating capabilities also for cationic analytes. The liquid chromatograph is constructed as follows. An analyte contained in a so...
|
|
WO/1998/042622A1 |
This invention relates to zeolitic molecular sieve compositions characterized by outstanding capability to complex multivalent cations, especially calcium. In particular, the invention relates to novel zeolitic molecular sieve compositio...
|
|
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...
|
|
WO/1998/040144A1 |
In accordance with the present invention, an improved bifunctional cation-exchange composition has been formed which comprises synthetic resin support particles and both crown ether and non-crown ether functional groups attached thereto....
|
|
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.
|
|
WO/1998/032774A1 |
Cation exchange resins are prepared by sulfonating copolymer beads in the presence of a swelling solvent under pressure. Pressure sulfonation shortens cycle times and requires less energy while maintaining or improving product quality.
|
|
WO/1998/032011A1 |
A method and apparatus for generating high quality acid or base in an aqueous stream for use in analysis, particularly, for use as an ion chromatography eluent. Water (10) is supplied to an ion exchange bed (14) where an electrical poten...
|
|
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...
|
|
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 ...
|
|
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...
|
|
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...
|
|
WO/1998/016581A1 |
Solid and liquid compositions containing particles of highly fluorinated ion-exchange polymer having sulfonate functional groups with an ion exchange ratio of less than about 33. The compositions contain at least about 25 % by weight of ...
|
|
WO/1998/016467A1 |
A porous inorganic composite comprising: an inorganic porous particle having an average diameter of 1 $g(m)m to 1 mm, a porosity of 0.20 to 0.90, and an average pore diameter of 10 to 5000 nm; and an inorganic material supported on the p...
|
|
WO/1998/010860A1 |
The invention concerns an adsorbent material selective with respect to metal pollutants, characterised in that it consists of particles with predetermined size grading less than 3 mm, of a feldspar ore of natural origin: its mode express...
|
|
WO/1998/006671A1 |
Simple and efficient methods of scavenging excess electrophiles from a reaction mixture are provided utilizing addition of water soluble nucleophiles or solid support bound nucleophiles. Resulting addition products are removed from react...
|
|
WO/1998/004598A1 |
Cation exchangers or chelating agents characterized by at least comprising structural units of general formula (I) and structural units derived from a cross-linking monomer having an unsaturated hydrocarbon group [wherein A is C�3?-Cï¿...
|
|
WO/1998/004348A1 |
A filter sheet is provided which comprises a self-supporting fibrous matrix having immobilized therein particulate filter aid and particulate ion exchange resin, wherein said particulate filter aid and particulate ion exchange resin are ...
|
|
WO/1997/049486A1 |
The present invention concerns zeolitic cation exchangers consisting of expanded ceramic, zeolitic pellets with macro- and microporosity, in the form of sintered, light, expanded clay aggregates which are partly transformed to zeolite by...
|
|
WO/1997/050092A1 |
Granular transition element hexacyanoferrates suitable for column use are produced from a soluble hexacyanoferrate compound and a salt of said transition element by way of slowly adding the aqueous solution of said soluble hexacyanoferra...
|
|
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...
|
|
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...
|
