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7465400 |
System for biodegradation of oxyanions such as perchlorate on ion exchange resins
Systems and methods for removing perchlorate load off of ion exchange resins are disclosed. The systems and methods rely upon direct contact between the resin and a liquid product formed by the...
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7311843 |
Bio degradation of oxyanions such as perchlorate on ion exchange resins
Systems and methods for removing perchlorate load off of ion exchange resins are disclosed. The systems and methods rely upon direct contact between the resin and a liquid product formed by the...
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6838069 |
Apparatus and method for ammonia removal from waste streams
Apparatus, materials, and methods for removing ammonia from fluid using metal hydroxides (e.g. zinc hydroxide) and metal cation loaded media (e.g. zinc loaded ion exchange resins); the metal...
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6827858 |
Method for separating alkali metal ions from alkoxylates
Alkali metal ions are separated off from alkoxylates containing alkali metal ions by a process comprising: a) dilution of the alkali metal-containing alkoxylate with an inert solvent, b) treatment...
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6673246 |
Reusable polysilsesquioxane adsorbents for pollutants
This invention pertains to adsorption by an adsorbent of an adsorbate and to regeneration of the loaded adsorbent. The adsorption includes contacting an adsorbent selected from arylene-bridged...
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6652755 |
Simulated moving bed separation system
A simulated moving bed separation system is provided, in which a fluid circulation flow path can be washed for a short time. This system is provided with a circulation flow path having two or more...
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6437010 |
Device and method for the regeneration of mixed ion exchange resin beds
A method for desalination of water or of aqueous solutions derived from industrial process that use two columns: the first treatment column containing a mixed bed of ion exchange resins, in which...
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6436294 |
Process for modifying the metal ion sorption capacity of a medium
A process for modifying a medium is disclosed that includes treating a medium having a metal ion sorption capacity with a solution that includes: A) an agent capable of forming a complex with metal...
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6358421 |
Method for countercurrent regeneration of an ion exchange resin bed
An improved method for regenerating ion exchange resin in a treatment tank having a flow direction, which includes the steps of providing a supply of regenerant under pressure into the tank, and...
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6340712 |
Non-chloride containing regenerant composition for a strong acid cation exchange resin of a water softener
Non-chloride containing regenerant compositions of potassium acetate or potassium formate, at least one surfactant and at least one chelating agent as well as methods for efficient regeneration of...
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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...
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6133431 |
Adsorbent for immunoglobulins and complexes thereof, adsorption method, and adsorption device
An adsorbent that exhibits a high specificity in adsorbing immunoglobulins and/or complexes thereof, is extremely reduced in the lowering of the adsorption characteristic during sterilization or...
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6106724 |
Process for separating chiral compounds using a unimodal large pore silica as the support
A process for separating one chiral compound from a mixture of chiral compounds is disclosed. The separation process involves using a chiral stationary phase (CSP) which comprises a chiral organic...
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5942123 |
Method of using a filter aid protein-polysaccharide complex composition
The present invention relates to a method of manufacturing filtering aids, coagulants or clarifying agents, and odor suppressants and a using a protein-polysaccharide complex composition as a...
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5932106 |
Process for regeneration of ion-exchange resins used for sugar decolorization, using chloride salts in a sucrose solution alkalinized with calcium hydroxide
Process for regeneration of ion-exchange resins, used in sugar decolorization, using a sucrose solution with sodium or calcium chloride, or another chloride, namely potassium or a mixture of those...
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5914044 |
Immobilized branched polyalkyleneimines
A solid phase ligand removes metal cations from solution. The ligand is a branched polyalkyleneimine having a molecular weight of at least about 400, covalently bound to an inorganic support.
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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...
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5863438 |
Processes for deionization and demineralization of fluids
Processes for deionization and demineralization of a fluid containing ions comprising: (a) Loading an amine or ammonia buffer onto a first weakly acidic cation exchange resin to occupy cation...
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5835865 |
Method and device for the disposal of a cation exchanger
A cation exchanger is loaded only with radioactive cations by repeatedly converting the non-bivalent, inactive cations into anionic complexes and flushing the complexes out of the cation exchanger....
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5762897 |
Method for manufacturing hydroxylamine
An improved ion exchange process for purifying and/or concentrating hydroxylamine from an aqueous solution comprising hydroxylammonium ion and counter anions wherein ion exchange process conditions...
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5665783 |
Recyclable regenerant for weak acid ion exhange resins
A composition for regenerating spent weak cation exchange resin and a method of utilization including salts of α-hydroxy carboxylic acids or o-hydroxy benzoic acids. The following steps are...
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5614100 |
Method for water remediation
Large volumes of waste water stream containing oil, greases, sometimes ferric ions, and dissolved contaminant hydrocarbons such as BTEX are rapidly treated in two stages. Initially, the oils and...
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5571421 |
Process for separating components of a liquid mixture
A process for separating components of a liquid mixture comprising a more adsorbable component (A), for example C 1 to C 6 carboxylic acids, and a less adsorbable component (B), for example...
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5538645 |
Process for the removal of species containing metallic ions from effluents
A process for the removal of species containing metallic ions from effluents by yeast cell walls. The yeasts used are selected from Saccharomyces cerevisae, Saccharomyces uvarum and Saccharomyces...
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5486294 |
Method of inhibiting barium sulfate and strontium sulfate scale at low pH
Disclosed is a method of inhibiting the formation of scales such as barium and strontium sulfate in low pH aqueous system. The method involves treating the aqueous system with a scale control...
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5474704 |
Regeneration compositions for cationic exchange resins
Improved compositions for the treatment and regeneration of ion exchange resin beds typically used in water softening systems are provided, which possess enhanced iron sequestering capabilities....
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5458784 |
Removal of contaminants from aqueous and gaseous streams using graphic filaments
A process for removing contaminants, particularly organic and metal contaminants, from aqueous and gaseous streams by contacting a contaminated stream with graphitic carbon filaments (nanofibers)...
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5443740 |
Process for the conditioning of ion exchange resins
For the conditioning of ion exchange resins, pure water is recirculated over a bed of the resin to be purified or of the resins to be purified. The pure water has a residual salt content of less...
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5428075 |
Method for regenerating a sulfonated aromatic organic polymeric ion-exchange resin bed having deactivated aminoorganomercaptan groups with phenol
A method is provided for regenerating deactivated sulfonated aromatic organic ion-exchange resin beds, such as a polystyrene ion-exchange resin bed, having chemically combined amino organo...
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5401417 |
Selective adsorption of organic material from water by modified clays
Purification of water with clay modified by cationic surfactant permits treatment of water with multiple impurities.
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5395533 |
Method of removing particles having a size less than 10 μm from an aqueous solution
Provided is a method of removing particles having a size of less than 10 μm from an aqueous solution. The pH of the aqueous solution is first adjusted to be less than 9 and then the aqueous...
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5391298 |
Method for performing a solid-phase extraction under pressurized conditions
A method of performing a solid phase extraction on an aqueous fluid using a hydrophobic, solid-phase extraction medium (40), which method comprises: (a) placing (10) a hydrophobic, solid-phase...
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5389261 |
Condensate polisher regenerant system
High pressure boiler condensate returns are polished and softened with a macroreticular cation exchange resin, and the resin is regenerated with a readily ionizable organic acid salt of a...
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5334316 |
Process of using polytetraalkylammonium and polytrialkylamine-containing ligands bonded to inorganic supports for removing and concentrating desired ions from solutions
A method for the removal and concentration of desired ions from a source solution which may contain larger concentrations of other ions including H + comprises bringing the source solution into...
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5310488 |
Water treatment method
A water treatment apparatus and method for softening "problem water". The apparatus includes a pair of treatment tank assemblies, each tank including serially connected filter and ion exchange...
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5308496 |
Resin regeneration process
Hydrogen chloride is stripped from spent basic ion exchange resin by treatment with a solution of a tertiary amine in an amide solvent. The eluent solution is treated with anhydrous ammonia to...
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5271835 |
Process for removal of trace polar contaminants from light olefin streams
A process is disclosed for improving catalyst performance and yields in the manufacture of motor gasoline components. More particularly the process is directed to the removal of H 2 S, sulfur...
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5244580 |
Method of removal and recovery of oil and grease from wastewater
There is disclosed a method of removal and recovery of oil and grease from wastewater wherein ferrite powders are used to adsorb the oil and grease contained in the wastewater, and then the oil and...
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5236594 |
Process for removing toxicants from aqueous petroleum waste streams
Specific toxicants are selectively removed from aqueous waste streams associated with the production of petroleum and petroleum products by contacting such aqueous waste streams with a non-ionic...
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5190663 |
Process for purifying waste water streams by inclusion complexation of polynuclear aromatic hydrocarbons
A process to reduce the concentration of dissolved polynuclear aromatic hydrocarbons in an aqueous composition, particularly a refinery waste water stream, by contacting the aqueous composition...
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5135656 |
Process for removing water soluble organic compounds from produced water
A process for the removal of water soluble organic compounds from produced water is provided. The process allows for the removal of water soluble organic compounds by passing the produced water...
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5116510 |
Separation of liquid mixtures by thermal swing adsorption
A new thermal swing adsorption process for the separation of a bulk liquid mixture into its respective components wherein a novel rinse step is employed to achieve high product recovery with a low...
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5115036 |
Metallic ion sorber
A metallic ion sorber capable of absorbing ions of a metal excluding iron and cobalt and a method of sorbing ions of a metal excluding iron and cobalt are disclosed. The sorber comprises an...
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5028696 |
Ion exchange and separation method
A method of separating charged molecules having different numbers of charges thereon includes the step of passing the molecules to be separated through ion-exchange material such as an ion-exchange...
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5026482 |
Separation of liquid mixtures by concentration swing adsorption
The present invention is a concentration swing adsorption process for separating a liquid phase feedstock comprising a more adsorbable component (A) and a less adsorbable component (B) with respect...
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5019271 |
Extractive chromatographic separation process for recovering 3,5-diethyltoluene
This invention comprises a process for separating 3,5-diethyltoluene from a feed mixture comprising 3,5-diethyltoluene and at least one isomer thereof, which process comprises contacting the...
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5011611 |
Method of separation of furfural from diluted aqueous solutions
Furfural is separated from a dilute aqueous solution by contacting the solution with a polymer adsorbent which comprises porous crosslinked copolymers of styrene and derivatives thereof, having an...
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4977243 |
Separation of sterols from low-acid feeds with magnesium silicate and methyl-tert-butyl ether desorbent
An adsorptive separation process for separating sterols from a feed mixture, especially one that is acid-free, containing sterols, e.g., tan oil, wool fat, etc., which process comprises contacting...
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4943376 |
Surfactant enhanced regeneration of hydrophobic materials
A method of regenerating spent hydrophobic materials, and recovering material sorbed thereon whereby sorbed materials are removed by contacting same with a surfactant solution. The surfactant...
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4943375 |
The process of separating a selected ion from a plurality of other ions in a multiple ion solution by contacting the solution with a macrocyclic ligand bonded to silica which selectively complexes with the desired ion
The invention has composition of matter and process aspects. The composition of matter aspect relates to the compounds selected from the class consisting of: ##STR1## in which Silica is sand or...
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