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6001258 |
Method for removing organic constituents from an aqueous stream
In order to remove organic constituents from an aqueous stream, the aqueous stream is combined with an adsorbent consisting of small particles to produce a dispersion in order to bind the...
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6001406 |
Method for stabilizing a beverage containing haze causing substances
The present invention relates to a method for the removal of polyphenols and proteins simultaneously from a beverage by contacting the beverage with an ion exchanger that is capable of adsorbing...
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5997747 |
Treatment of phosphorus in septic tank effluent
Treatment of sewage water contaminated by phosphorus is accomplished by passing the water through iron oxide. The iron oxide is placed in close proximity to soft resilient open-cell foam, which...
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5989430 |
Method for eluting antimony adsorbed on chelating resin
In a method for recovering antimony from the electrolyte of copper electro-refining process, the antimony is adsorbed on the chelating resin and is then eluted by acid. The eluate is then...
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5985152 |
Method of preventing corrosion in a water system
Ca ion is removed by a cation exchange resin and silica and corrosive ions are removed by an anion exchange resin. Even after the anion exchange resin reaches the silica break through point or...
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5980750 |
Process for the purification of waste wash water
An improved apparatus and method for the purification of waste wash water derived from the production of aromatic acids. Lost aromatic acid product and the heavy metal oxidation catalyst is...
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5980753 |
Process for recovering volatile acids
The present invention provides a process for recovering a volatile acid charaterized by bringing a waste liquid containing the volatile acid into contact with an amine having a boiling point of at...
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5976382 |
Removal of proteins from aqueuos media by precipitation
There is provided water insoluble cross-linked polycarboxylic acid having at least two strands in a strand skeleton of the formula: ##STR1## wherein one carbonyl group of at least one maleoyl...
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5976379 |
Metathetic process utilizing a cation exchanger
Disclosed is a metathetic process of the type M'X+M"=M'Y+M"X, where M' dirs from M" and the reagents and the products are water-soluble salts, comprising the steps of (a) transferring a solution of...
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5958232 |
Reverse osmosis drinking water treatment system with backwashable precise prefilter unit
A reverse osmosis drinking water treatment system with a backwashable precise prefilter unit includes a super precise filter, a pressure pump and its automatic control system, a reverse osmosis...
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5955510 |
Process for the regeneration of ion exchange resins in a fixed double-bed type apparatus
The present invention relates to a process for the regeneration of the resins in a fixed double-bed type ion exchange apparatus and the apparatus thereof. Said process of regeneration comprises of...
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5948264 |
Ion exchange and regeneration process for separation and removal of iron (III) ions from aqueous sulfuric acid metal ion-containing solutions
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...
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5944868 |
Production of liquid fertilizers by ion exchange
Ion exchange is used to make two grades of liquid fertilizer. In the first phase, ammonium thiosulfate (ATS) is contacted with a potassium-containing ion exchange resin to make the liquid...
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5942122 |
Method of deodorizing ion-exchanged purified water
An ion-exchanged purified water having an odor substance generated from a double bed type purified water producing apparatus and a mix bed type purified water producing apparatus is flowed through...
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5928518 |
Cross-flow filtration process for separating organic compound by adsorption on inorganic solids
Process for separating and/or isolating organic compounds which are soluble in water, some of which are adsorbed on finely divided inorganic solids, by adsorption of this fraction and isolation of...
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5919287 |
Process for the purification of a solution of lithium salts contaminated by metallic cations and use of this process in the production of zeolites exchanged with lithium
A process for the purification of a solution of lithium salts contaminated by metallic cations, comprising (i) passing the solution to be purified through an exchange region packed with a material...
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5917022 |
Process for removing endotoxins
A process for the removal of endotoxin from a biological product such as proteins for therapeutic use, blood plasma fractions, and albumin solutions that contains endotoxins, which comprises...
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5917010 |
Preparation process of aliphatic polyester
The invention relates to a preparation process of aliphatic polyester, comprising using an ion exchange resin as a drying agent and after the dehydration polycondensation reaction, regenerating and...
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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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5908557 |
Process for the removal of pentavalent arsenic from water
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...
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5904832 |
Regeneration of active carbon and polymeric adsorbents
Method for the regeneration of active carbon and polymeric adsorbents having oxidizable, organic pollutants adsorbed thereon by electrochemical and chemical means and apparatus therefor. The method...
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5879559 |
Valve controller for water conditioning system
A control unit for operating a valve system in a water conditioner system includes a drive motor having an output shaft coupled to the valve system, a valve position slide switch, an electronic...
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5858119 |
Ion exchange resin cleaning method
A method for cleaning ion exchange resins. The ion exchange resin is circulated by a circulating medium within a circulation, system. The concentration of ions within a circulation medium is...
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5855790 |
Magnetic particles, a method for the preparation thereof and their use in the purification of solutions
Magnetic particles which comprise a core of a magnetic material surrounded by a mixture of a fibrous material and a solid binding agent. The particles may be embedded in a polymer resin which...
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5855789 |
Process for removing selenium from selenium-containing waste streams
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...
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5851403 |
Ceramic honeycomb and method
Conductive and/or chemically absorptive ceramic fibers are woven with optional non-conductive/non-absorptive ceramic fibers to create a fiber reinforcement which is impregnated with a...
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5846429 |
Method for separating and recovering boron trifluoride
A method for effectively separating and removing or recovering BF 3 existing in a liquid hydrocarbon which is characterized in that an organic liquid mixture containing suspended or dissolved BF 3...
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5792441 |
Fixed-resin bed technologies for the treatment of the chlorine dioxide generator effluent and feeds stream
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...
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5788864 |
Amine heat stable salt removal from type II anion exchange resin
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...
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5773655 |
Process for the purification of an aqueous solution of a tertiary amine-oxide
The invention is concerned with a process for the purification of an aqueous solution of a tertiary amine-oxide containing impurities partially present in a dissolved and partially in a...
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5766483 |
Process for hydrogen fluoride separation
A method for separating hydrogen fluoride from a chemical mixture is provided. In the process of the invention, hydrogen fluoride is separated from a chemical mixture containing hydrogen fluoride...
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5766565 |
Purification of hydrochloric acid
A process is described by which numerous waste or by-product aqueous hydrochloric acid streams can be purified by contacting the aqueous hydrochloric acid with activated carbon to remove silicon...
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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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5746922 |
Process for removing chromate ion from a concentrated solution of sodium sulfate
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...
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5723098 |
Process for the recovery of catalysts in adipic acid production
The invention relates to a process for the selective recovery of catalysts used in the production of adipic acid by (a) separating adipic acid from the reaction solution, (b) exposing the...
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5714075 |
Method of processing a cheese processing waste stream
A method of processing a cheese processing waste stream generated in a cheese-making process, comprising: i) contacting a cheese processing waste stream with an anion exchange resin under...
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5705075 |
Apparatus for maintaining a stable bath for an autodeposition composition by periodically separating particular metal ions from the composition
A system automated for providing at least periodic removal of metal ions and contaminants from a chemical bath, consists of a microprocessor programmed for controlling fluid circuits of pumps and...
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5702610 |
Sheet materials for solid phase extractions and solid phase reactions
A sheet article for solid phase extraction or solid phase reaction comprises at least one sorptive polymer pulp, and optionally at least one of sorptive and reactive particulate. The article can be...
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5702608 |
Process and installation for the decontamination of radioactive nitric effluents containing strontium and sodium
The invention relates to a process and an installation for the decontamination of radioactive nitric effluents containing strontium and sodium. According to this process, contacting takes place in...
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5695989 |
Apparatus and method for separating particles using a pliable vessel
A method and apparatus for separating target particles from a mixture of target and non-target particles. The apparatus includes a vessel having an inlet through which the mixture may be introduced...
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5690832 |
Chemically active ceramic compositions with a phospho-acid moiety
Novel composite materials useful for removing heavy metal ions from solutions, such as aqueous waste streams, comprise an inorganic ceramic support, such as silica gel, having terminal hydroxy...
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5676838 |
Process for isolating hydroxymonocarboxylic and tricarboxylic acids
The invention relates to the removal of hydroxymonocarboxylic acids and tricarboxylic acids from aqueous solutions by adsorption on zeolites with a modulus of up to 400.
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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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5652190 |
Method for regenerating magnetic polyamine-epichlorohydrin resin
Magnetic polymer resins capable of efficient removal of actinides and heavy metals from contaminated water are disclosed together with methods for making, using, and regenerating them. The resins...
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5647991 |
Method and apparatus for treatment of contaminated water using waste shot blast fines
A method and apparatus for removing contaminants such as heavy metals and organic pollutants from contaminated water using waste cast steel shot blast fines is described. Shot blast fines were...
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H001661 |
Ion exchange removal of cations under chelating/complexing conditions
A process for removing complexed or chelated ions from an aqueous solution using a cationic chelating resin in the sodium form. The process is particularly useful for removing metal ions chelated...
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5626765 |
Method for adsorbing and separating heavy metal elements by using a tannin adsorbent
A method of adsorbing and separating a heavy metal element by using a tannin adsorbent comprising: (a) adjusting the pH of a solution containing a plurality of heavy metal elements to a...
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5609767 |
Method for regeneration of electroless nickel plating solution
An electroless nickel(EN)/hypophosphite plating bath is provided employing acetic acid/acetate as a buffer and which is, as a result, capable of perpetual regeneration while avoiding the production...
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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...
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5602247 |
Process for the purification of aqueous solutions of tertiary amine-oxides
The invention is concerned with a process for the production of cellulose molded bodies. This process has the following steps: (A) dissolving cellulose in an aqueous solution of a tertiary...
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