Patents
Sitemap › C02 - Treatment of water, waste water, sewage, or sludge › C02F - Treatment of water, waste water, sewage, or sludge › C02F 1 - Treatment of water, waste water, or sewage
Patents for C02F 1 - Treatment of water, waste water, or sewage (145,124)
09/1981
09/15/1981US4289815 Cold water-insoluble polyvinyl alcohol pouch for the controlled release of active ingredients
09/15/1981US4289645 Hydroquinone and mu-amine compositions
09/15/1981US4289617 Water softening and reverse osmosis system
09/15/1981US4289599 Apparatus for producing alkaline water and acidic water
09/15/1981US4289594 Treatment of waste compositions
09/15/1981US4289581 4,5-dichloro-1,2-dithiol-3-one, nonionic surfactants, hydrophilic solvents; papermaking
09/15/1981US4289540 Hydrolyzed starch-containing compositions
09/15/1981US4289531 From industrial waste water by treatment with feathers, hair, hoof meal or horn meal
09/15/1981US4289530 Recovering silver from waste photographic solutions
09/15/1981US4289505 Solvent recovery from water
09/15/1981CA1109032A1 Tablet dispenser
09/09/1981EP0035248A1 Process and apparatus for the biological purification of waste water
09/09/1981EP0035243A2 Method and device for flotation
09/08/1981US4288430 Disinfectant chlorinated cyanurate containing compositions and method of use
09/08/1981US4288328 Treatment with alum, chlorination
09/08/1981US4288326 Rotary shaft driven reverse osmosis method and apparatus
09/08/1981US4288323 Free flow non-corrosive water treatment device
09/08/1981US4288309 Electrolytic device
09/08/1981US4288303 Electrochemical processing system
09/08/1981CA1108555A1 Electrostatic water treatment apparatus
09/08/1981CA1108552A1 Extractive distillation recovery process
09/08/1981CA1108376A1 Method of removal of arsenic from a sulfuric acid solution
09/02/1981EP0034920A1 Water evaporation process
09/02/1981EP0034684A1 1,3-Diformyloxy-2-bromo-2-nitropropane, its preparation and use in anti-microbial applications
09/02/1981EP0009480B1 Process and reactor for producing a treating aqueous solution containing at least hydrogenoperoxide ions and hydroxyl ions according to predetermined concentrations and use of the reactor
09/01/1981US4287069 Process for the improved working up of effluent
09/01/1981US4287062 Apparatus for biological purification of sewage
09/01/1981US4287057 Rechargeable, with indicator
09/01/1981US4287026 Desalinization method
09/01/1981US4287019 For desalination of seawater
09/01/1981US4286436 Falling film freeze exchanger
09/01/1981CA1108320A1 Method of eliminating surfactant influence in liquid extraction systems
09/01/1981CA1108319A1 Disposal of thixotropic muds
09/01/1981CA1108090A1 Recovery of variable valency metals from compounds in voltaic cell
09/01/1981CA1108023A1 Recovery of suspended particulate metal from quench water
09/01/1981CA1107975A1 Process for selective extraction of metal ions from aqueous solutions and extracting agents suitable for that purpose
08/1981
08/28/1981EP0024422A4 Water purification system employing ozone injection.
08/26/1981EP0034184A1 Method for recovering bromine contained in a discharge
08/26/1981EP0034147A1 Method for bacteriological treatment of manure and high bod industrial wastes
08/25/1981US4285819 Functional magnetic microspheres
08/25/1981US4285765 Water treatment
08/19/1981EP0033930A1 Method of equalizing the load of contaminants in a stream of waste water
08/19/1981EP0033903A1 Precipitant, process for its production and its use in dephosphatizing waste water
08/19/1981EP0033849A2 Method for the recuperation of thermal energy contained in the vapours of multi-step evaporators used in thermal mass-transfer processes, and device for carrying out this method
08/18/1981US4284611 Aqueous phosphate-stabilized polyaluminum sulfate solutions and preparation thereof
08/18/1981US4284516 Process for the removal of low level (ppm) halogenated contaminants
08/18/1981US4284515 Process for decreasing elemental phosphorus levels in an aqueous medium
08/18/1981US4284512 Iron selective resins prepared from a phenol, HCHO and a di-secondary amine
08/18/1981US4284511 Process for using magnetically ballasted sorbents
08/18/1981US4284509 Floating, agglomeration, lipids
08/18/1981US4284492 Reverse osmosis electrodialysis combined means
08/18/1981CA1107414A1 Process for clarifying coal wash waters
08/18/1981CA1107413A1 Method and apparatus for treating water
08/18/1981CA1107267A1 Absorbent composition for oil and the like
08/18/1981CA1107073A1 Method for calcining radioactive wastes
08/12/1981EP0033575A2 Multi-stage expansion evaporator
08/11/1981US4283283 Water filter
08/11/1981US4283211 Power generation by exchange of latent heats of phase transition
08/06/1981WO1981002230A1 Heat pump method of concentrating fluids
08/06/1981WO1981002154A1 A desalination apparatus with power generation
08/05/1981EP0033247A1 Electrolytic apparatus for reclaiming dissolved metal from liquid
08/04/1981US4282351 Treating yeast, mold or fungus containing chitin and glucan with alkali, chelating transition metals
08/04/1981US4282172 Static, for use within water tank of ozonator
08/04/1981US4282111 Hydroquinone as an oxygen scavenger in an aqueous medium
08/04/1981US4282104 Anticarcinogen additive for water supplies
08/04/1981US4282103 Method for controlling flocculant addition to tar sand tailings
08/04/1981US4282093 Apparatus for detecting coagulation effect
08/04/1981US4282092 Titania-alumina
08/04/1981US4282070 Energy conversion method with water recovery
08/04/1981US4282059 Paper fillers
08/04/1981CA1106404A1 Method for the production of urea and purification of water
08/04/1981CA1106348A1 Process for the regeneration of spent aqueous solutions of sodium, potassium and/or ammonium sulfides
08/04/1981CA1106312A1 Electrolytic cell with membrane
08/04/1981CA1106161A1 Compositions capable of concentrating and collecting oil spills and method of using them
07/1981
07/29/1981EP0032610A1 Method for the removal of impurities from liquid mixtures
07/28/1981US4281199 Reacting a polyoxyalkylene polyol with an epinalohydrin and then an amine; cationic polymers
07/28/1981US4281186 Papermaking, sewage treatment
07/28/1981US4280925 Ion exchanging with zinc sulfide
07/28/1981US4280914 Measuring the ph with the addition of hydrogen peroxide oxidizer
07/28/1981US4280912 Sterilization
07/28/1981US4280886 Adsorption and electrolysis
07/28/1981CA1106100A1 Micro-bits of expanded flexible polyurethanes
07/28/1981CA1105927A1 Triple ions of 1,2-and 1,4-dicarbonyl compounds and analogs thereof containing nitrogen and containing two strategic oxygen or nitrogen groups and process for producing same
07/28/1981CA1105880A2 Method and apparatus for electrochemical contaminant removal from liquid media
07/28/1981CA1105845A1 Method and apparatus for separating solids from liquids
07/22/1981EP0032419A2 Process for the detoxification of aqueous media
07/22/1981EP0032357A2 Use of 2-chloro-4,6-diamino-s-triazines as algicides
07/22/1981EP0032248A1 Process for the detoxification of waste waters that contain cyanide, and reaction solutions
07/21/1981US4279876 Conversion of extraction residues originating from phosphoric acid decontamination to solid deposition products
07/21/1981US4279865 Organic compound oxidation plant
07/21/1981US4279842 For aeration waste treatment
07/21/1981US4279767 Use of improved hydroquinone oxygen scavenger in aqueous mediums
07/21/1981US4279759 Controlling water treatment
07/21/1981US4279757 Compressing a polyurethane foam to extract the liquid
07/21/1981US4279756 Water clarification
07/21/1981US4279754 Means for separation of gas and solids from waste mixed liquor
07/21/1981US4279716 Waste treatment - electrolytic for bathrooms
07/21/1981US4279693 Process for purifying polluted fluids
07/21/1981CA1105638A1 Granular flocculants and their manufacture
07/15/1981EP0031896A1 Method and apparatus for biologically treating waste water
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