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| Number | Title | Issue Date |
| 6331253 | Method and plant for tangential filtration of a viscous liquid The invention relates to a method of tangential filtration of a viscous fluid or liquid in which a supercritical substance is dissolved in a supercritical state in this viscous fluid or liquid so as to lower the viscosity. The invention also relates to th... | 12/18/2001 |
| 6328894 | Processes of purifying a dispersion and making inkjet inks A process to purify and classify a dispersion containing stabilized particles having counterions and ions as well as free species is disclosed. The solution may comprise an aqueous media, a solvent media, or a combination of both and can include more than... | 12/11/2001 |
| 6329182 | Method of producing oligosaccharide syrups, a system for producing the same and oligosaccharide syrups The present invention relates to a method of producing oligosaccharide syrups, in particular to the production of syrups having a high concentration of saccharides with a degree of polymerization of at least 2, comprising the steps of: enzymatic reaction ... | 12/11/2001 |
| 6321915 | High performance filters based on inorganic fibers and inorganic fiber whiskers A filter media structure, which is capable of operating in the micro- and nanofiltration regime, offers: low cost, durability, high temperature and chemical resistance, high permeability, high flow rate, low pressure drop across the filter media, high mec... | 11/27/2001 |
| 6312655 | Method for the removal of carbon dioxide from a process gas The invention relates to the absorption of carbon dioxide from a process gas using a solution of potassium carbonate, potassium bicarbonate, diethanolamine and potassium vanadate, followed by desorption of the carbon dioxide from the solution and recyclin... | 11/06/2001 |
| 6312601 | Silica precipitate A process and system for removing heavy metals, fluoride, silica and other contaminants from large volumes of wastewater is disclosed. In the process, a wastewater stream containing the contaminant is treated with a chemical coagulant to create a particle... | 11/06/2001 |
| 6303037 | Reverse osmosis process and equipment A reverse osmosis treatment of feed water containing at least silica and hardness ions for separating the feed water into permeate water and concentrate is effected while maintaining the pH of the concentrate at a level of at most 6. According to the fore... | 10/16/2001 |
| 6287347 | Method for washing clothes A method of washing textiles in an institutional washing machine wherein soil-containing wastewater is regenerated through a nanofiltration membrane and recycled to the washing process.... | 09/11/2001 |
| 6284293 | Method for generating oxygenated water An apparatus 10 generates oxygenated water having a significantly reduced oxidation reduction potential (ORP). A carbon filter 100 removes particulate impurities from the water as it comes into the apparatus. A water softener 150 removes minerals from the... | 09/04/2001 |
| 6280853 | Composite membrane with polyalkylene oxide modified polyamide surface A composite membrane and method for making the same, comprising a porous support and a crosslinked polyamide surface having polyalkylene oxide groups grafted thereto. The subject membrane provides improved resistance to fouling while offering excellent fl... | 08/28/2001 |
| 6277282 | Reverse osmosis element utilizing a fabric composed of substantially oriented fibers A reverse osmosis membrane element is provided that can treat a raw liquid throughout a wide raw liquid pressure range from a low pressure to a high pressure, comprising a reverse osmosis membrane, a permeated liquid passage conduit provided on one surfac... | 08/21/2001 |
| 6270672 | Devices and methods for removing pathogens from biological fluids A method for removing pathogens from biological liquids and an apparatus for performing such a method, said method comprising the steps of providing a biological liquid, wherein pathogens are potentially present, in an apparatus comprising an anode and a katho... | 08/07/2001 |
| 6267891 | High purity water production using ion exchange A method of producing high purity water using weak acid cation exchange for dealkalization and a double pass reverse osmosis membrane system having enhanced membrane life.... | 07/31/2001 |
| 6261456 | Waste water treatment method and waste water treatment equipment capable of treating waste water containing fuluorine, nitrogen and organic matter Waste water containing fluorine, nitrogen and organic matter is treated by introducing the waste water into a water tank filled with calcium carbonate mineral and anaerobic microorganic sludge. An upper portion of the water tank is occupied by the anaerob... | 07/17/2001 |
| 6258278 | High purity water production A method of producing high purity water using dealkalization and a double pass reverse osmosis membrane system having enhanced membrane life.... | 07/10/2001 |
| 6254779 | Treatment of effluent streams containing organic acids An acidic organics-containing waste water stream (12) derived from for example plant for the production of an aromatic carboxylic acid such as terephthalic acid is treated to allow recovery of alkali and water for recycle to the production process. The tr... | 07/03/2001 |
| 6217770 | Apparatus and method for treatment of water A water treatment process using a membrane separation apparatus to separate clean product water from a contaminated water source, the membrane is provided within a housing having inlet ports for collecting concentrated and product water, and the apparatus... | 04/17/2001 |
| 6195825 | Laundry wash-cycle water recovery system A waste-water treatment and recycling process that reduce water, energy and chemical consumption in commercial laundry operations. A portion of the warm waste water from each wash cycle is first passed through a vibrating shaker screen to remove particles... | 03/06/2001 |
| 6190556 | Desalination method and apparatus utilizing nanofiltration and reverse osmosis membranes Apparatus and methods for producing potable water from an aqueous feed such as seawater utilizing a pressure vessel designed for operation in the range of about 250 psig to about 350 psig having reverse osmosis (RO) separation elements disposed upstream o... | 02/20/2001 |
| 6190558 | Reverse osmosis purification system A reverse osmosis water purification system for providing potable water from a municipal water or other source containing undesired impurities. A motor driven pump supplies a feed stream to a reverse osmosis unit resulting in the creation of a product wat... | 02/20/2001 |
| 6187197 | Multi-stage engine coolant recycling process A multi-stage apparatus and a process for recycling used engine coolant employs a combination of filtration, dissolved air floatation, centrifugation (hydrocyclone separation), semi-permeable nano filtration, reverse osmosis, and continuous deionization f... | 02/13/2001 |
| 6187200 | Apparatus and method for multistage reverse osmosis separation This invention relates to an apparatus and method for a multistage reverse osmosis separation which comprises reverse osmosis membrane module units arranged at multistage with a booster pump provided in the concentrate flow channel between reverse osmosis... | 02/13/2001 |
| 6187201 | System for producing ultra-pure water A system for producing ultra-pure water having an electrodialysis unit 1, which has a membrane selectively permeable to monovalent cations and a membrane selectively permeable to monovalent anions, and a reverse osmosis unit 5 which is connected after the... | 02/13/2001 |
| 6187202 | Electrolysis gas to lift a filtered liquid A method of purifying fluids in which a filter is disposed at sufficient depth in a channel, a fluid is electrolyzed to produce a gas, and expansion of the gas is used to raised the filtrate upwards. The methods are contemplated to be particularly useful ... | 02/13/2001 |
| 6183648 | Process for purification of organic sulfonates and novel product A process for producing a low sulfate organic sulfonate/sulfate aqueous solution from a soluble sulfate containing organic sulfonate/sulfate which comprises forming an aqueous solution of organic sulfonate/sulfate; and passing the aqueous solution of the ... | 02/06/2001 |
| 6183646 | Biofouling reduction The invention relates to the reduction and prevention of biofouling in facilities utilizing water, e.g. sea water, carrying biological organisms, without causing corrosion, chemical reaction or other detrimental action from the additive or environmental d... | 02/06/2001 |
| 6180009 | Method of filtering the organic solutions arising in the production of circuit boards The present invention relates to a process for fractionating organic circuit board manufacture process solutions by means of at least one very fine filtration step. In the process of the present invention, the dissolved substances present in the process s... | 01/30/2001 |
| 6180056 | Method and compositions for minimizing biological and colloidal fouling A composition for minimizing biological and/or colloidal fouling is described, which includes an anionic antiscalant and a cationically charged biocide. Further, a method of controlling fouling is described and achieved by introducing a formulation of the... | 01/30/2001 |
| 6177011 | Composite reverse osmosis membrane having a separation layer with polyvinyl alcohol coating and method of reverse osmotic treatment of water using the same A reverse osmosis composite membrane that has a high salt rejection, a high water permeability, and a high fouling tolerance, and permits practical desalination at a relatively low pressure is provided by coating the surface of a reverse osmosis membrane ... | 01/23/2001 |
| 6168719 | Method for the purification of ionic polymers To provide a method for purification of the ionic polymer compound comprising efficiently removing low-molecular impurities, for example, ionic remaining monomers, which are charged identically to the ionic polymer compound from the ionic polymer compound... | 01/02/2001 |
| 6162361 | Plating waste water treatment and metals recovery system A process for removing heavy metal ions or cyanide ions from a waste water stream originating in a metal plating plant or a mine comprising the steps of pretreatment in which the waste water stream is first pretreated by removing particulates, fats and oi... | 12/19/2000 |
| 6139750 | Water desalination A desalination plant is disclosed which includes a pump for pumping water at a pressure of between 50 and 65 Bar to a generally cylindrical filter element which includes a plurality of reverse osmosis membranes defining salt passages. Immediately upstream... | 10/31/2000 |
| 6132617 | Method of producing milling adjuvants and/or dispersive agents, by physicochemical separation; adjuvants and agents thus obtained; and uses of the same A method of producing milling adjuvants and/or dispersing agents, with the use of a separation apparatus which is comprised of one or more organic and/or mineral membranes; a milling adjuvant and/or dispersing agent produced by said method; and use of sai... | 10/17/2000 |
| 6132618 | System and method for waking a computer having a plurality of power resources from a system state using a data structure A method for purifying commercial alkali metal silicate solutions involves passing the alkali metal silicate solution through a nanofiltration device having a membrane with a molecular weight cutoff of between about 400 to about 3,000 daltons. Preferably,... | 10/17/2000 |
| 6126834 | High resistivity water production with controlled water temperatures An adaptive control method for producing high purity water, the method having the ability to produce high purity water on a continuous basis having a resistivity in the range of 0.8 to 4 megohm-cm. The method comprises the steps of providing a feedwater t... | 10/03/2000 |
| 6120689 | High purity water using triple pass reverse osmosis (TPRO) A method for producing high purity product water using a three pass reverse osmosis system.... | 09/19/2000 |
| 6113797 | High water recovery membrane purification process Disclosed is a two-stage high pressure high recovery process utilizing two reverse osmosis membrane systems intended to provide very high overall water recoveries from contaminated inorganic scale-containing water in an economical manner while preventing ... | 09/05/2000 |
| 6113798 | Process for the purification of hydrogen peroxide Process for purification of aqueous solutions of hydrogen peroxide comprising the steps of adding one or more macroligands to said solution to form a mixture and forcing the mixture through an ultrafiltration membrane.... | 09/05/2000 |
| 6110375 | Process for purifying water Water to be purified is passed through a reverse osmosis step to produce a pure water stream and a waste water stream. The waste water is directed to a deionization step to produce purified deionized water which is recycled to the reverse osmosis step. Th... | 08/29/2000 |
| 6110379 | Method for treating water containing sulfate An apparatus and method for removing contaminating metal ions and sulfate ions from acidic aqueous solution such as waste mine water which features passing the solution between pairs of electrodes, each pair of electrodes impressed with a voltage selected... | 08/29/2000 |
