| Patents for C02F 1 - Treatment of water, waste water, or sewage (145,124) |
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| 04/07/1981 | US4260493 Removal of copper and nickel, reduction, deactivating complexes |
| 04/07/1981 | US4260491 Reduction, chelation, precipitation |
| 04/07/1981 | US4260487 Zeolite for oxidizing and precipitating iron, manganese and hydrogen sulfide; potassium permanganate; brine |
| 04/07/1981 | US4260484 Hydroxyaromatic compound adsorption |
| 04/07/1981 | US4260468 Gas induction swimming pool chlorinator |
| 04/07/1981 | US4260463 Generating chlorine gas carbon dioxide, and alkali metal hydroxide by electrolysis |
| 04/07/1981 | US4260462 Process for separating acid gases and ammonia from dilute aqueous solutions thereof |
| 04/07/1981 | US4260461 Heat exchanging, antiscaling agents, degassing |
| 04/02/1981 | WO1981000854A1 Treatment of organic material in supercritical water |
| 04/01/1981 | EP0025813A1 Apparatus for water purification and/or aeration by dissolved gas flotation |
| 03/31/1981 | US4259483 Quaternary ammonium salts of α-1,4-thiazine alkanephosphonic acids |
| 03/31/1981 | US4259269 Adding biocide to water cooling system |
| 03/31/1981 | US4259251 Treatment of effluent |
| 03/31/1981 | US4259182 Waste treatment apparatus |
| 03/31/1981 | CA1098523A1 Cationic polymer flocculant |
| 03/31/1981 | CA1098485A2 Electrostatic water treatment |
| 03/31/1981 | CA1098461A1 Method for depolluting fresh water- and salt water bodies from crude oil, petroleum products and their derivatives |
| 03/25/1981 | EP0025589A1 Process and apparatus for the biological treatment of aqueous waste in a pure oxygen-activated sludge/ozone system |
| 03/24/1981 | US4258136 Process for producing wood adsorbents for mercury ions by graft polymerization of acrolein onto xanthated wood meal followed by conversion to thiosemicarbazone |
| 03/24/1981 | US4258132 Process for producing an agglutinating substance utilizing dematium ATCC 20524 |
| 03/24/1981 | US4257899 Method for removing chloropicrin from an aqueous medium |
| 03/24/1981 | US4257897 Aerobic sludge treatment |
| 03/24/1981 | US4257891 Dual disc pressure release valve |
| 03/24/1981 | US4257885 Novel zeolite compositions and processes for preparing and using same |
| 03/24/1981 | US4257807 Precious metals recovery process |
| 03/24/1981 | CA1098026A1 Vapor compression liquid treating system |
| 03/19/1981 | WO1981000707A1 Method of desalinating water |
| 03/18/1981 | EP0025342A1 Apparatus for extracting water from ambient air |
| 03/18/1981 | EP0025281A1 Oil-containing waste water treating material comprising modified active carbon and method of removing oil fractions from oil-containing waste water |
| 03/18/1981 | EP0025068A1 Method and apparatus for treating raw water |
| 03/17/1981 | US4256855 Homo- and copolymers of acrylic esters or vinyl ethers containing crown ether rings; extractors; gas absorbers |
| 03/17/1981 | US4256587 Siliceous adsorbent for heavy metals |
| 03/17/1981 | US4256577 Treatment with a base and then with amorphous magnesium silicate to form a complex |
| 03/17/1981 | US4256574 Ozone disinfection system |
| 03/17/1981 | US4256570 Purification of phosphoric acid |
| 03/17/1981 | US4256557 Copper electrowinning and Cr+6 reduction in spent etchants using porous fixed bed coke electrodes |
| 03/17/1981 | US4256556 Anodically polarized surface for biofouling and scale control |
| 03/17/1981 | US4256552 Chlorine generator |
| 03/17/1981 | US4256440 Liquid dosing apparatus |
| 03/17/1981 | US4255937 Atmospheric water collector |
| 03/17/1981 | CA1097605A1 Water clarification |
| 03/17/1981 | CA1097587A1 No translation available |
| 03/11/1981 | EP0024875A2 Process for controlling the biological fouling of reverse osmosis permeators |
| 03/11/1981 | EP0024487A1 Apparatus for treating material by the irradiation thereof |
| 03/11/1981 | EP0024422A1 Water purification system employing ozone injection. |
| 03/10/1981 | US4255663 Disposable liquid sterilizer unit |
| 03/10/1981 | US4255548 Flocculants |
| 03/10/1981 | US4255410 Centrifugal force |
| 03/10/1981 | US4255383 Multichamber UV purifying process |
| 03/10/1981 | US4255262 Hydraulic powered mixing apparatus |
| 03/10/1981 | US4255257 Process for the treatment of water |
| 03/10/1981 | US4255255 Tubular membrane separation process and apparatus therefor |
| 03/10/1981 | US4255246 Electrolytic cell for chlorine production |
| 03/10/1981 | CA1097257A1 Method and apparatus for precipitating colloids from aqueous suspensions |
| 03/10/1981 | CA1097228A1 Water purifier with bypass |
| 03/10/1981 | CA1097021A1 Apparatus for sterilizing liquids |
| 03/03/1981 | US4254250 Aminated acrylonitrile homo- or copolymers for treating sewage sludge, industrial wastes, silty water |
| 03/03/1981 | US4253971 Applying biguanide polymer, algicide |
| 03/03/1981 | US4253970 For recovering powders from slurries |
| 03/03/1981 | US4253965 Purification device |
| 03/03/1981 | US4253958 Method of treating polluted aqueous media |
| 03/03/1981 | US4253957 Marine sewage disposal |
| 03/03/1981 | US4253951 Method of reducing aerosolization of wastewater |
| 03/03/1981 | US4253949 Sewage treatment-flotation apparatus |
| 03/03/1981 | US4253928 Electrodialysis |
| 03/03/1981 | US4253307 Solar power generator and water purifier |
| 03/03/1981 | CA1096980A1 Apparatus for treating fluids |
| 03/03/1981 | CA1096978A1 Selective removal of iron cyanide anions from fluids containing thiocyanates |
| 03/03/1981 | CA1096808A1 Water distiller of boiler-condenser type |
| 02/24/1981 | US4252773 Safety chemical cartridge |
| 02/24/1981 | US4252743 Corrosion resistance; pickling, acidification processes, and brine systems |
| 02/24/1981 | US4252654 Oxidation with ozone |
| 02/24/1981 | US4252643 Adsorption of naphthalenic hydrocarbons |
| 02/24/1981 | US4252616 Water distillation apparatus and method |
| 02/24/1981 | US4252444 Apparatus for agitating liquids |
| 02/24/1981 | US4252142 Apparatus for discontinuously diluting a liquid in another liquid, to a given level of concentration |
| 02/24/1981 | CA1096517A1 Process and apparatus for producing sterilised and bacteria-free water suitable for medicinal injection preparations and other technical purposes |
| 02/24/1981 | CA1096313A1 Method for treatment of waste water |
| 02/24/1981 | CA1096297A1 Deoxygenation of water |
| 02/19/1981 | WO1981000340A1 Disinfectant chlorinated cyanurate containing compositions and method of use |
| 02/17/1981 | US4251486 Redox reaction with sodium carbonate |
| 02/17/1981 | US4251473 For carbonation of water |
| 02/17/1981 | US4251410 Flocculation agents in papermaking |
| 02/17/1981 | US4251367 Wastewater treatment |
| 02/17/1981 | US4251363 Using a high molecular weight and a low molecular weight acrylamide-acrylic acid copolymer |
| 02/17/1981 | US4251362 Method of, products and devices for processing polluting materials such in particular as hydrocarbons cast up by the sea, waste sludges |
| 02/17/1981 | US4250910 In-line apparatus for dissolving a solid in a liquid |
| 02/17/1981 | CA1096080A1 Water-soluble dispersions of high molecular weight water-soluble polymers |
| 02/17/1981 | CA1096070A1 Polyquaternary compounds for the control of microbiological growth |
| 02/17/1981 | CA1096069A1 Process for the detoxication of waste water containing phenol, phenol derivatives or phenol and formaldehyde (ii) |
| 02/17/1981 | CA1096068A1 Process for complete or selective removal of salts from aqueous solution |
| 02/17/1981 | CA1096066A1 Waste asbestos recovery from production of asbestos products |
| 02/17/1981 | CA1096065A1 Water softening system |
| 02/11/1981 | EP0023892A1 Process and apparatus for sterilizing liquids by ultraviolet radiation |
| 02/10/1981 | US4250391 Apparatus for sterilizing liquids |
| 02/10/1981 | US4250269 Water-soluble mixtures of quaternary ammonium polymers, nonionic and/or cationic vinyl-addition polymers, and nonionic and/or cationic surfactants |
| 02/10/1981 | US4250144 Chlorine dioxide generating system |
| 02/10/1981 | US4250126 Chlorine generator and method |
| 02/10/1981 | US4250040 Gravity filtration, intermittent ozonization and periodic backwashing |
| 02/10/1981 | US4250030 Process for the removal of cyanides from effluent |