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| Number | Title | Issue Date |
| 7455779 | Process for selective removal and immobilization of contaminants from spent sorbents Contaminated drinking water and other liquids are decontaminated by contact with sorbents to remove toxic contaminants such as arsenic, as well as non-toxic contaminants. In regenerating the spent sorbents, the waste stream contains both toxic and non-toxic contamin... | 11/25/2008 |
| 7291272 | Inorganic contaminant removal from water A method is provided for removing an inorganic ionic species or organometallic ion contaminant, or combination contaminants, including such as arsenic, chromium, bromide, bromate, perchlorate, and/or others from water which contains an unacceptably high concentratio... | 11/06/2007 |
| 7264837 | Resin deacidification of citrus juice and high acid maintenance The deacidification of citrus juice with ion exchange resin is described. Maintaining a high acid condition of the juice is achieved by passing the juice through regenerated resin that is preconditioned with an aqueous food-grade acid, preferably citric acid. Additi... | 09/04/2007 |
| 7208651 | Product recovery from simulated-moving-bed adsorption Product purity from or capacity of a simulated-moving-bed adsorptive separation process is increased by flushing the contents of the transfer line previously used to remove the raffinate stream away from the adsorbent chamber, preferably into the raffinate column us... | 04/24/2007 |
| 7172744 | Process for manufacturing highly concentrated hydroxylamine An improved ion exchange process for manufacturing and concentrating hydroxylamine from an aqueous solution comprising hydroxylammonium ion and counter anions is disclosed. The process involves the use of an aqueous hydroxylamine wash step which assists in controlli... | 02/06/2007 |
| 7141173 | treatment process to remove metal contamination from groundwater The present invention provides a process for enhancing the metal contaminant sorption capacity of mineral compounds within a groundwater-bearing formation by manipulating the pH and the surface acidity of the mineral compounds. The process is useful in removing meta... | 11/28/2006 |
| 7029521 | Process and device in connection with the production of oxygen or oxygen enriched air Process in conjunction with the production of oxygen (22), wherein incoming air (10, 16, 16a, 16b,) is brought to pass through a sorbent/zeolite structure (18), which comprises at least three zeolite units (50a–f... | 04/18/2006 |
| 7005058 | Process and apparatus for removing sulfur from hydrocarbons Disclosed is an apparatus and process for controlling the sulfur content of effluent from a hydrocarbon fractionation column. The effluent includes a low boiling stream, a middle boiling stream and a high boiling stream. Either of the feed or the low boiling stream ... | 02/28/2006 |
| 6896814 | Fractional deionization process A liquid treatment process is described for sequential removal of ionic species of progressively decreasing ionic strength without precipitation or “scaling.” An aspect of the invention includes dual electrodeionization operations. The first electrodeionization ... | 05/24/2005 |
| 6872314 | Dewatering process Disclosed is a process for dewatering an organic compound other than a carboxylic acid using a simulated moving bed (SMB) containing a solid with different absorptivities for water and the organic compound. The organic compound is fed into the SMB as an aqueous solu... | 03/29/2005 |
| 6852233 | Metal-collecting apparatus and method for elution and recovery of metal from metal-collecting material An object of the present invention is to provide a structure of a metal collecting material for use in seawater or river water or industrial wastewater to give the most excellent adsorption efficiency. Another object of the present invention is to provide a process ... | 02/08/2005 |
| 6762057 | Separation apparatus including porous silicon column A sample separation apparatus including a porous, or rough, capillary column. The porous capillary column includes a matrix which defines pores, and may be formed from a material such as porous silicon. Alternatively, the capillary column may have a rough surface of... | 07/13/2004 |
| 6576137 | Differential and continuous separation process with controlled paramenters for solids and liquids By regulating separation system's relative parameters, this broad and generalized separation process is disclosed to distinguish the fundament between this invention and chromatography for superior cost-effectiveness. A different mass transfer contacting ... | 06/10/2003 |
| 6200364 | Process for eluting precious metals from activated carbon A process is disclosed for the recovery of gold and/or silver values from activated carbon, wherein they are adsorbed as cyanide complexes. The process uses an eluant containing sugar. The process allows the eluant to pass through fresh carbon twice, ther... | 03/13/2001 |
| 6132621 | Method of selectively removing zinc from acid effluents This invention relates to a method of selectively removing zinc from an effluent, wherein the effluent is passed over an anion exchange column under conditions at which negatively charged zinc complexes are adsorbed to the column material. Subsequently, t... | 10/17/2000 |
| 6123850 | Process for the purification of virtually anhydrous organic liquids The subject matter of the present invention is a process for the purification of a virtually anhydrous organic liquid other than DMSO alone, in order to decrease its content of alkali and alkaline-earth metal and metal cations, characterized in that it co... | 09/26/2000 |
| 5884777 | Simulated moving bed absorption separation process Disclosed is a method for the adsorptive separation by utilizing an improved simulated moving bed. This invention provides an improved formula for the calculation of primary flush flowrate by correspondingly associating the primary flush flowrate with eac... | 03/23/1999 |
| 5681477 | Thermally-driven ion-exchange process for lithium recovery Ions (e.g. lithium) can be removed or recovered from brines containing those ions and optionally one or more other ions (e.g. other alkali metal ions) by the use of a temperature-swing, ion-exchange process employing an ion-exchange material. The process ... | 10/28/1997 |
| 5607595 | Process for purifying water A process and device for purifying water of the type wherein activated carbon is subjected to regeneration. Tap water is contacted with activated carbon fibers characterized by a narrow micropore distribution and a high adsorption speed, to eliminate by a... | 03/04/1997 |
| 5603837 | Separation of a multicomponent mixture into components thereof A multicomponent mixture is separated into its components by subjecting the multicomponent mixture to a separation means to flow therein, which means comprises a plurality of columns divided into at least three groups wherein each group of columns has the... | 02/18/1997 |
| 5601721 | Method for reducing the selenium concentration in an oil refinery effluent Selenium exists in oil refinery stripped sour water as selenocyanate and can be effectively removed using an acrylic, strong base, anion exchange column or stannous chloride. The acrylic, strong base, anion exchange column can also be employed to remove a... | 02/11/1997 |
| 5578218 | Brine treatment method In a brine treatment method of removing sulfate ions from sulfate-ion contained brine, sulfate-ion contained brine is brought into dispersive contact with granular ion exchange resin carrying zirconium hydrous oxide thereon in a fluid state under an acidi... | 11/26/1996 |
| 5531897 | Dynamic bed reactor A dynamic bed reactor is disclosed in which a compressible open cell foam matrix is periodically compressed and expanded to move a liquid or fluid through the matrix. In preferred embodiments, the matrix contains an active material such as an enzyme, biol... | 07/02/1996 |
| 5405534 | Process for separating and purifying a multicomponent mixture A process and apparatus for continuously separating a multicomponent mixture containing at least 3 components and purifying each component in a high concentration, high purity and high recovery, wherein the apparatus comprises a column group comprising a ... | 04/11/1995 |
| 5273660 | Aminoalkylphosphonic acid containing ligands attached to solid supports for removal of metal ions 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... | 12/28/1993 |
| 5250188 | Process of removing and concentrating desired molecules from solutions A method is disclosed for the quantitative removal and concentration of desired molecules or ions, such as gases, anions and amino acids, from a source solution which may contain larger concentrations of other molecules. The method comprises bringing the ... | 10/05/1993 |
| 5250187 | Resin bed for liquid treatment A method of treating fluid in a bed of ion exchange resin wherein in one embodiment the resin is of a high kinetic type and water is introduced upwardly through the bed to effect a complete fluidized resin bed. The high kinetic resin is of a fine mesh typ... | 10/05/1993 |
| 5248395 | Process for purifying aqueous media Ground water which contains heavy metal ions and toxic volatile organic compounds is purified by passing an air stream through it to purge out the organic compounds, adsorbing the displaced organic compounds on a molecular sieve and destroying them using ... | 09/28/1993 |
| 5190618 | Production of high concentration tocopherols and tocotrienols from palm-oil by-products A process for the production of tocopherols (T) and tocotrienols (T3) from palm fatty acid distillates (PFAD). The process includes converting free fatty acids and glycerides in PFAD into alkyl esters, then separating T and T3 from the alkyl esters and ot... | 03/02/1993 |
| 5126272 | System for detecting transition and rare earth elements in a matrix A method for the detection of trace transition elements and rare earth elements in a sample also containing alkali metals or alkaline earth elements. The sample is flowed through a chelator column which retains the transition elements and rare earth eleme... | 06/30/1992 |
| 5084185 | Method of ion exchange The present invention relates to a method of reducing the concentration of contaminant ions, preferably nitrates ions, in impure water. The method comprises steps of: a) passing the impure water through an ion exchange resin to substitute regenerant ions ... | 01/28/1992 |
| 5013449 | Process for solute recovery utilizing recycle liquids having a stored concentration profile The process of the invention is an adsorptive solute recovery from a dilute solution that, during elution of the adsorbent bed, stores for recycling donor and receiver portions of effluent from the bed that range in concentration from barren to just less ... | 05/07/1991 |
| 4965053 | Ion exchange purification of scandium An improvement in purification of scandium through ion exchange chromatography is disclosed in which the oxidation potential of the eluting solution is altered by the addition of potassium chlorate or ammonium chloride so that removal of contaminants is e... | 10/23/1990 |
| 4927541 | Process for refining amino acids Amino acid each is separated and refined by bringing aqueous solution containing various amino acids into contact with chelate resins having aminocarboxylic acid groups or aminophosphonic acid groups and having metal ions coordinated, until amino acids ar... | 05/22/1990 |
| 4874524 | Separation of adsorbed components by variable temperature desorption An adsorption-desorption process for separation of a component from a feed mixture of components wherein at least two components of the feed mixture are adsorbed by an adsorbent material during the adsorption step of the adsorption-desorption process and ... | 10/17/1989 |
| 4816233 | Ion exchange method for the recovery of scandium A method of recovering quantitatively trace amounts of scandium from aqueous solutions containing large amounts of other metals consists of reducing any manganese and iron in the solution to the divalent states of manganese and iron. The solution is then ... | 03/28/1989 |
| 4765909 | Ion exchange method for separation of scandium and thorium A method for a quantitative separation of scandium from thorium comprises adsorption of both metals on a cation exchange resin followed by selective elution of scandium with an acidic solution of a chelating agent followed by the elution of thorium by a s... | 08/23/1988 |
| 4764280 | Water softening apparatus A water softening apparatus and method for reducing odor in, and improving the taste of, problem water, including a pair of treatment tanks and a control valve assembly for determining which tank is on-line, and which tank is off-line, and for controlling... | 08/16/1988 |
| 4758349 | Separation process for biological media A continuous industrial separation process for biopolymer extracts each individual single component from a stream of cell extract. The process can be set up as a mixed flow reactor or fluidized bed in a continuous operation under normal pressure to treat ... | 07/19/1988 |
| 4666604 | New elution complex more especially for affinity chromatography and affinity precipitation A novel elution complex is provided more especially for affinity chromatography and affinity precipitation for recovering in particular luciferase hexokinase and lactate dehydrogenase. This complex comprises 1 mM to 30 mM of MgSO4, from 30 mM to 50 ... | 05/19/1987 |
