| Patents for C02F 1 - Treatment of water, waste water, or sewage (145,124) |
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| 08/13/1991 | CA1287597C Electric-impulse method for treating substances and device for carryingout the method |
| 08/13/1991 | CA1287573C Method for controlling macroinvertebrates |
| 08/13/1991 | CA1287572C Antimicrobial composition containing isothiazolone |
| 08/10/1991 | WO1991012569A1 Drinking water filter |
| 08/10/1991 | CA2075480A1 Drinking water filter |
| 08/10/1991 | CA2032835A1 Self-inverting, water-in-oil emulsions |
| 08/09/1991 | CA2014727A1 Methods for removing solids from water-based paint systems |
| 08/08/1991 | WO1991012301A1 Process in thermal decomposing a carbonaceous raw material and reactor for carrying out the process |
| 08/08/1991 | WO1991011395A1 Oxidizing apparatus |
| 08/08/1991 | WO1991011394A1 Process for oxidation of materials in water at supercritical temperatures |
| 08/08/1991 | WO1991011393A1 Treatment of piggery effluent |
| 08/08/1991 | WO1991011392A1 Method of cleaning soil water |
| 08/08/1991 | WO1991011262A1 Manipulation of solid, semi-solid or liquid materials |
| 08/08/1991 | WO1991011243A1 Device for purifying sewage |
| 08/08/1991 | WO1991011238A1 Vacuum distillation using suction apparatus |
| 08/08/1991 | WO1991009145A3 Method for recovering metals from waste liquors |
| 08/08/1991 | DE4106515A1 Prodn. of pulverous solid dispersions of active substances - comprises homogenising water-contg. solid suspension with active substance and then with alkaline earth oxide |
| 08/08/1991 | DE4101230A1 Safe disposal of industrial waste water and sediment - by crystallising solid matter out of water, and adding germ former prior to freezing and thawing stages |
| 08/08/1991 | DE4101076A1 Pre-tipping redn. of liq. in sewage sludge - by applying electro-impulses from discharge condenser |
| 08/08/1991 | DE4101020A1 Verfahren und reaktor zur wiedergewinnung von energie und chemikalien aus ablauge Method and reactor for the recovery of energy and chemicals from waste liquor |
| 08/08/1991 | DE4100464A1 Removal of nitrogen oxides from flue gases of combustion plants - by adding ammonia to flue gases produced from ammonium salt-contg. effluent on passing through packed column |
| 08/08/1991 | DE4003516A1 Elektrodenelement fuer elektrolytische zwecke und dessen verwendung Electrode element for electrolytic purposes and its use |
| 08/08/1991 | DE4003446A1 Producing cold and power from heat-pump - operated with binary fluids to utilise low-grade available heat |
| 08/08/1991 | DE4003193A1 Improving quality of water to remove e.g. heavy metals - by passage through electrochemical cell with inert anode and cathode connected by potentiostat |
| 08/08/1991 | DE4003049A1 Pptn. of phenol(s) from aq., esp. alkaline, solns. - by addn. of strong (in)organic acid to pH below 2 |
| 08/08/1991 | CA2075372A1 Process in thermal decomposing a carbonaceous raw material and reactor for carrying out the process |
| 08/07/1991 | WO1991012358A2 Electrode element for electrolytic purposes and its use |
| 08/07/1991 | EP0439895A1 Homogeneous mixtures of solid organic acids and solid cationic ester-based polymer flocculants |
| 08/07/1991 | EP0439866A1 Product and method for separating contaminants from polluted water |
| 08/07/1991 | EP0439850A1 Separation of particles adsorbed on carrier material |
| 08/07/1991 | EP0439770A2 Process for removing harmful substances and recovering valuable substances from a coking plant waste water stream |
| 08/07/1991 | EP0439762A1 Process for the preparation of storage stable and free flowing ferrous sulphate |
| 08/07/1991 | CN2082389U Sinstered core of ore material |
| 08/07/1991 | CN2082267U Domestic scal-proof device using magnetization |
| 08/07/1991 | CN1053598A Method and solid material body for purification of fluids such as water, aqueous fluids and liquid fuels |
| 08/07/1991 | CA2073352A1 Electrode element for electrolytic purposes and its use |
| 08/06/1991 | US5037927 Modified n-vinylformamide copolymer having reduced viscosity |
| 08/06/1991 | US5037618 Oxidation chamber |
| 08/06/1991 | US5037559 Addition of flocculants; comparing signals with no-minal values; separatio of liquid from solids |
| 08/06/1991 | US5037557 Treated silica for oil absorption |
| 08/06/1991 | US5037555 Desalination of water |
| 08/06/1991 | US5037550 Biological contactor for purifying water to produce drinking water and associated control method |
| 08/06/1991 | US5037547 Dual stage filter cartridge for a reverse osmosis purification system |
| 08/06/1991 | US5037546 Permanent magnetic power cell circuit for treating fluids to control mineral scale and scale-induced corrosion in pipes and fluid flow systems |
| 08/06/1991 | US5037524 Apparatus for treating liquids with high-intensity pressure waves |
| 08/06/1991 | US5037519 Electrolytic chlorine generator |
| 08/06/1991 | US5037510 Integrated water distiller and/or water heater and/or furnace |
| 08/06/1991 | US5037463 Freeze concentration and precipitate removal system |
| 08/06/1991 | CA1287370C Apparatus for magnetic treatment of flowing liquid |
| 08/06/1991 | CA1287285C Method for flocculating suspensions containing swelled layered chalcogenide |
| 08/06/1991 | CA1287274C Combustion of aqueous sewage sludge by the fluidized bed process |
| 08/02/1991 | CA2022716A1 Homogeneous mixtures of solid organic acids and solid cationic ester-based polymer flocculants |
| 08/01/1991 | DE4006689A1 Determining the quality of waste waters - where characteristics of water are continuously measured in non-invasive manner and computer compares measured values with pre-set limits |
| 08/01/1991 | DE4002608A1 Free running ferrous sulphate hepta:hydrate prodn. - by mixing moist and dry salt in required ratio, useful as flocculant and in pigment mfr. |
| 07/31/1991 | EP0439253A1 Water treatment system with preservice rinse |
| 07/31/1991 | EP0438776A1 Preparation of insoluble tannin and its applications for waste treatment and adsorption processes |
| 07/31/1991 | EP0438713A2 Method for removing heavy metal ions from wine and related drinks |
| 07/31/1991 | EP0438529A1 Removing hazardous contaminants from water. |
| 07/31/1991 | EP0160043B1 A process for continuously removing and recovering ammonia from aqueous ammonia waste water |
| 07/31/1991 | CN2081837U Water treatment apparatus using high-frequency electric field |
| 07/31/1991 | CN2081836U Program-controlled full-automatic softening unit of hard water |
| 07/31/1991 | CN1053414A Waterglass precipitate recovery process |
| 07/31/1991 | CN1053413A Process and apparatus for treadment of brines and contaminated mineral salts or mixtures thereof |
| 07/31/1991 | CA2035100A1 Process for the production of storable, free-flowing hydrated ferrous sulfate |
| 07/30/1991 | US5035810 Process for treating wastewater which contains sour gases |
| 07/30/1991 | US5035809 Controlling water pollution |
| 07/30/1991 | US5035808 Flocculation of suspended solids from aqueous solutions |
| 07/30/1991 | US5035807 Water treatment for sulfate ion removal |
| 07/30/1991 | US5035804 Oil spill water treatment |
| 07/30/1991 | US5035803 High yield water-soluble polymer silica separation resins |
| 07/30/1991 | US5035798 Filtration vessel and end cap lock by a flexible rod |
| 07/30/1991 | US5035188 Liquid blowdown elimination system |
| 07/30/1991 | CA2074840A1 Sewage purification apparatus |
| 07/30/1991 | CA2074829A1 Method for purifying sewage |
| 07/30/1991 | CA1287194C Installation for flocculating coagulable suspensions, in particular for cleaning the backwater from de-inking plants used for waste-paper preparation |
| 07/25/1991 | WO1991010622A1 Water purifier |
| 07/25/1991 | WO1991010516A1 Preventative maintenance system for underwater pipes |
| 07/25/1991 | WO1991010494A1 Personal drinking water purification |
| 07/25/1991 | WO1991010493A1 Multi-function filter cartridge with flow distribution control |
| 07/25/1991 | WO1991008985A3 Catalytic method for degrading aqueous effluent containing toxic hydrocarbon compounds by oxidation |
| 07/25/1991 | DE4012144C1 Overflow water treatment from coking plants - uses reverse osmosis plant and is carried out without removal of ammonia |
| 07/25/1991 | DE4007127C1 Electrode for electrolytic treatment of waste water - consists of nonwoven or needle felted non-conducting plastic fibres providing porous structure |
| 07/25/1991 | DE4001851A1 Treating hot aq. degreasing liq. for reuse |
| 07/24/1991 | EP0438372A2 Reverse osmosis system |
| 07/24/1991 | EP0438331A1 Use of graft cellulose for water purification |
| 07/24/1991 | EP0438264A2 Paint sludge separator system |
| 07/24/1991 | EP0438073A1 Method and device for water purification |
| 07/24/1991 | EP0437805A1 Apparatus for the expulsion of light volatile pollutants from ground water |
| 07/24/1991 | EP0437763A1 Method for treating aqueous solutions |
| 07/24/1991 | EP0425491A4 Reversible mechanochemical engines comprised of bioelastomers capable of modulable inverse temperature transitions for the interconversion of chemical and mechanical work |
| 07/24/1991 | CN2081386U Health care water treating device |
| 07/24/1991 | CN2081316U Automatic temp.-adjusting electrolytic heat sucking-oxygen water supply device |
| 07/24/1991 | CN2081261U Air-pressure thermos water pipe with purifying, mining and magnetization function |
| 07/24/1991 | CN1053266A Silver recovering method and equipment from the waste water in film developing and printing factory |
| 07/23/1991 | WO1991010623A1 N,n'-dihaloimidazolidin-4-ones |
| 07/23/1991 | US5034155 Sodium molybdate and benzotriazole as corrosion inhibitors with citric acid as an iron dispersant and a microbiocide |
| 07/23/1991 | US5034138 Method and apparatus for producing activated mineral water |
| 07/23/1991 | US5034137 Alkali or alkaline earth metals hydroxides for defloculation of muddy water, coagulation, adding ferric sulfate |
| 07/23/1991 | US5034136 Release agents and flocculation of paints |
| 07/23/1991 | US5034131 Heat treatment of wastes |