Matches 351 - 400 out of 557 < 1 2 3 4 5 6 7 8 9 10 11 12 >
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5306428 Method of recovering energy from reverse osmosis waste streams  
Hydraulic energy is recovered from the waste brine through a control device, having a central rotatable spool piece controlling fluid flow paths therethrough. The control device, in turn, directs...
5300229 Process for removing colored components from solvent for polyacrylonitrile  
A process for removing colored components from a recovered inorganic solvent of polyacrylonitrile, without an appreciable decrease in the concentration of active components, using a reverse osmosis...
5284589 Process for the treatment of effluent  
The process for the working-up of effluents and disposal of the loads, present therein, by a combination of concentration by membrane filtration, evaporation and gas phase oxidation, is...
5282972 Method and apparatus for recycling R/O waste water  
Waste water discharged from a reverse osmosis unit served by a water feed line and producing potable water is returned to the water feed line for water conservation purposes. After periodic...
5282970 Method for environmentally benign paint spraying with an air-drying lacquer dissolved, emulgated or dispersed in water  
In the process of spraying in a cubicle having a water-rinsed rear wall the cubicle waste water is separated by ultrafiltration into permeate and lacquer-containing residue. The permeate is...
5282967 Method for feeding germ-free pure water  
A method of feeding pure water under germ-free conditions is provided by purifying raw water into primary water by successive passage through a defined series of purification units, temporarily...
5277817 Apparatus and methods for treating electroless plating baths  
Apparatus and methods for removing polyvalent by-product anions, e.g. borate and orthophosphate ions, from electroless metal plating baths employing borane or hypophosphite reducing agents and...
5269934 Removal of oily residues from aqueous waste streams  
A process for removing oily residues from aqueous waste streams using a cross flow filtration system in which the efficiency of a dynamic membrane system comprising a gel layer and supporting...
5269933 Method for separating a fluid mixture  
An improved method is provided for separation of a mixture of an organic fluid and water. The method is a combination of a distillation, an H 2 O-selective pervaporation and a reverse osmosis and...
5266202 Reverse osmosis treatment process  
This invention relates to a reverse osmosis treatment process, particularly a stable reverse osmosis treatment process which prevents a lowering in throughput capacity by carrying out treatment...
5266203 Method for treating process streams containing cyanide and heavy metals  
An apparatus and method for treating streams containing cyanide, heavy metal and precious metal values to recover those values where the method includes the following steps: a) providing a...
5259972 Apparatus and method for purifying water  
In an apparatus and method for purifying water, an oxidation forcibly turns colloidal substances into fine particles of oxides, thus increasing the size of the particles. The effluent of oxidation...
5259954 Portable intravenous solution preparation apparatus and method  
A modular, portable intravenous solution preparation system consists of a plurality of reusable modular sections for creating ultra pure, intravenously injectable quality water and a consumable...
5254257 Reclaiming of spent brine  
The method of purifying spent brine from the regeneration of ion exchange resin, for example resin in water softeners. The method comprises acidifying the spent brine to a pH of less than 3 with an...
5250183 Apparatus for manufacturing ultra-pure water  
The present invention provides an apparatus for manufacturing ultra-pure water, characterized in that a decarbonator/degassor and a reverse osmosis equipment for pretreatment of supply water are...
5246586 Apparatus and method for producing ultrapure water and method of controlling the apparatus  
An apparatus for producing ultrapure water includes a cation exchange resin tower, a decarbonation tower, an anion exchange resin tower, and a pH adjustor for changing the zeta potential of the...
5244577 Process for preparing osteogenesis promoting substance  
A process for preparing an osteogenesis promoting substance, which comprises extracting a demineralized bone powder with a solution of chaotorpic reagent, subjecting the extracted solution to...
5244579 Transportable reverse osmosis water purification unit  
A self-contained, transportable reverse osmosis water purification unit has a limited throughput of no more than about 20 gpm of permeate in a single pass operation with reverse osmosis ("RO")...
5242597 Fixed cycle time ultrafiltration process  
A method is presented for achieving constant purification cycle times over the life of an ultrafiltration membrane in a silver halide purification system. Silver halide emulsion pumped from a feed...
5238574 Method and apparatus having reverse osmosis membrane for concentrating solution  
A method and an apparatus for treating salt water by a multiplicity of reverse osmosis membrane modules or a structure constituted by combining a multiplicity of reverse osmosis membrane modules...
5229005 Ocean depth reverse osmosis fresh water factory  
A process for the desalination of sea water by lowering from a floating platform (11) sets of vessels (66), which are constructed or laminated in part with reverse osmosis elements (65) or (64),...
5221485 Purification of X-ray contrast agent, magnetic resonance imaging agent, or radiopharmaceuticals using reverse osmosis  
The use of reverse osmosis as an alternative or substitute method for the purification of a crude diagnostic agent. X-ray contrast agent, magnetic resonance imaging agent, or radiopharmaceuticals...
5221479 Filtration system  
A dead-end type filtration system wherein a bulk (or bulk suspension) comprising a fluid containing suspended matters is filtered through a micro-filter membrane to separate the fluid form the...
5207916 Reverse osmosis system  
A single, reverse osmosis membrane system having a double-pass, product-staged design using first and second banks of membranes in series, with excessive pressure supplied by the pump to the feed...
5205937 Recovery and reuse of water-based cleaners  
The present invention provides a process for the ceramic filtration of contaminants from water-based cleaners by passing a feed solution of water-based cleaner and contaminants through a metal...
5204004 Method and apparatus for preventing bacteriological contamination by a dental tool water line  
A method and apparatus are disclosed for preventing bacterial contamination from being introduced into a dental patient's mouth from water flowing through a dental tool water line. A flexible water...
5203993 Method and apparatus for removing salt from sea water  
A method and apparatus for removing substantial portions of the saline content in salt water by passing air bubbles through the salt water in a tank to produce droplets having substantially reduced...
5201943 Process for recycling and refurbishment of water-wipe intaglio inks used in water wipe intaglio printing  
A process is disclosed in which ink contained in a water-wipe solution used in the intaglio printing of security documents is recycled after being refurbished. The water-wipe solution is...
5194157 Blood purifying equipment particularly for the treatment of patients suffering from renal insufficiency, and a method of producing a reinfusion liquid for haemodiafiltration (HDF)  
Blood to be purified is passed through a haemofiltration element and a haemodialysis element in cascade and the ultrafiltrate output from the haemofiltration element is passed through a filter such...
5192418 Metal recovery method and system for electroplating wastes  
The present invention relates to a method of completely recovering nickel and zinc metal from multiple plating process waste streams by first separating the waste streams into a clean, relatively...
5183572 Cross-flow filtration system and method for filtering a solvent-particulate waste stream  
A system and method for the filtration of a solvent-particulate waste stream, such as a water solvent-particulate waste stream derived from the washing of a printing press blanket. The system and...
5182023 Process for removing arsenic from water  
A process for treating arsenic-containing aqueous waste is described wherein the aqueous waste, treated if necessary to minimize the presence of materials which reduce the efficiency of reverse...
5178766 Composite semipermeable membrane, process of producing the same and method of producing highly pure water using the same  
A composite semipermeable membrane which has a high electrolytes rejection even when the concentration of the electrolytes in feed water is very low and even if the pH of feed water is not less...
5174901 Liquid purifying system  
In a system for purifying liquid, a method is provided wherein the liquid is pretreated by passing it through a sand filter water softener and carbon filter for removal of hardness and particulate...
5174900 Apparatus for separation and for treatment of fluid feedstreams, wafers for use therein and related methods  
A method for the treatment of fluid feedstreams comprises the steps of providing at least one wafer (200) comprising a central area (202) providing a plurality of members (18) arranged in a...
5167826 Engine collant recycling apparatus and process  
An apparatus and a process for recycling used engine coolant employs a reverse osmosis process for separating ethylene glycol from a concentrate coolant solution. The engine coolant concentrate is...
5160044 Process for separating ethanol from aqueous solution  
The present invention provides a process for separating ethanol from an aqueous solution by supercritical or near supercritical extraction in combination with reverse osmosis, which includes...
5160437 Purification of crude Ioversol using reverse osmosis  
The use of reverse osmosis as an alternative or substitute method for the purification of a crude diagnostic agent. In the purification process a crude Ioversol solution is contacted with a...
5158681 Dual membrane process for removing organic compounds from the water  
An apparatus and process for treating water contaminated with hydrocarbons utilizes a dual membrane apparatus wherein contaminated water is first treated by a cellulose based membrane to produce a...
5158683 Bromide separation and concentration using semipermeable membranes  
Aqueous solutions containing bromide and one or more polyvalent anions are separated by nanofiltration into two streams, a brine enriched in the bromide and a brine enriched in the polyvalent...
5152900 Method for preparing packaged sterilized mineral water, method for producing sterilized container for packaging the same and packaged sterilized mineral water  
Sterilized and packaged mineral water comprises sterilized mineral water having a hardness of not less than 50 mg/l and a content of dissolved carbonic acid gas ranging from 9 to 30 mg/l (as...
5137654 Process for reclaiming oil/water emulsion  
A process (50) is provided that operates to convey a contaminated oil/water emulsion metalworking fluid (2) under pressure through an ultrafilter membrane (12) to separate a substantial amount of...
5133867 Reverse osmosis process for recovery of C.sub.3 -C.sub.6 aliphatic hydrocarbon from oil  
Solvents comprising C 3 , C 4 , C 5 and C 6 aliphatic hydrocarbons (i.e. propane, propylene, butane, butylene, pentane, cyclopentane, pentene, hexane, cyclohexane, hexene and their isomers) and...
5133851 Process for reducing the metal content of a hydrocarbon mixture  
Process for reducing the metal content of a hydrocarbon feed mixture by reverse osmosis, comprising contacting the feed mixture substantially boiling in the range between about 100° and about...
5132017 Reverse osmosis system  
A reverse osmosis method includes a sediment filter which cleans feed water from a source and from which that feed water is fed to a reverse osmosis membrane filter. Permeate from the latter is fed...
5126052 Condensate polishing system incorporating a membrane filter  
A method and apparatus for polishing a condensate is provided wherein the condensate contains both suspended and colloidally dispersed solid impurities, and also intermittent and variable levels of...
5118423 Method of removing water from a dilute solution of N-methylmorpholine-N-oxide, N-methylmorpholine, or morpholine  
For the removal of water from dilute aqueous solution of NMMO, N-methylmorpholine or morpholine or mixtures thereof, the solution is subjected to reverse osmosis at a pressure in excess of the...
5116507 Treatment for reducing impurities in aqueous liquor  
The invention relates to a method of treating an aqueous liquor, such as effluent liquor formed during coal gasification. The method comprises subjecting the liquor to dephenolation and ammonia...
5104544 Refining of a rare earth including a process for separation by a reverse osmosis membrane  
The invention is concerned with a process of separation and refining of rare earths in which a dilute solution of rare earths, resulting from the step of separating and refining the rare earths by...
5100556 Transverse sheet membrane separation module, components thereof and related methods  
A wafer (100) providing transverse sheets of semipermeable membrane (21). Such wafers include peripheral support means (101) defining a generally cylindrical ring and having inside (104) and...
Matches 351 - 400 out of 557 < 1 2 3 4 5 6 7 8 9 10 11 12 >