| Patents for C02F 1 - Treatment of water, waste water, or sewage (145,124) |
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| 02/21/1991 | DE4022279A1 Irradiating non-electrolytes from gas - filled discharge chamber by applying high potential electric source to electrodes using cylindrical electrode connected by dielectric layer |
| 02/21/1991 | DE3926996A1 Disposal of domestic refuse - by mixing it with slurry, then drying and subsequently burning mixture |
| 02/20/1991 | EP0413356A1 Process for treating waste water |
| 02/20/1991 | EP0413244A2 Process for separation and recycling of by-products from the wastewater of the synthesis of 5-amino-4-chloro-2-phenyl-3(2H)-pyridazinone |
| 02/20/1991 | EP0307450B1 Treatment of water throws from sloughs containing ligno-sulfonates |
| 02/20/1991 | CN2071646U Automatic air-float mud discharger |
| 02/20/1991 | CN2071644U Device for adding bactericide quantitatively to outlet of water pump |
| 02/20/1991 | CN2071643U Alkalinity-decreasing softener regenerated by regenerated waste liquid of salt removing system |
| 02/20/1991 | CN2071642U Chain type oil and foam scraping machine |
| 02/20/1991 | CN1049323A Polymeric silicate liquid flocculating agent and preparation method |
| 02/20/1991 | CN1049322A Process and plant for removing gas in water containing oxygen |
| 02/19/1991 | US4994390 Enzyme blend containing cellulase to control industrial slime |
| 02/19/1991 | US4994191 High speed, selectivity |
| 02/19/1991 | US4994184 Ultrafiltration device and process |
| 02/19/1991 | US4994182 Apparatus for the thickening by floatation of slurries produced during the treatment of waters |
| 02/19/1991 | US4994179 Vessel containing hydrocyclone and skimming chamber |
| 02/19/1991 | US4994163 Rotatable wastewater metal-reclaimation device |
| 02/19/1991 | US4994160 Electric-impulse method for treating substances and device for carrying out the method |
| 02/19/1991 | CA1280270C Basic aluminum chlorosulphate, its preparation and its use as a clotting agent |
| 02/17/1991 | WO1991002849A1 Process for in situ decontamination of subsurface soil and groundwater |
| 02/17/1991 | WO1991002698A1 Improved sewage treatment process |
| 02/17/1991 | CA2064809A1 Sewage treatment process |
| 02/15/1991 | EP0434671A4 Liquid separator. |
| 02/14/1991 | DE3938670C1 Drinking water from sea water - water is pulled in through vacuum in floating column and passes through to evapn. chamber |
| 02/14/1991 | DE3926586A1 Cleaning waste water from glass industry - using type I or II anion exchangers to remove arsenic and antimony fluoride complex ions |
| 02/14/1991 | DE3926495A1 Prevention of scale in water pipes - by imparting swirl to water as it flows through magnetic field |
| 02/14/1991 | DE3926059A1 Phosphonomethylierte polyvinylamine, verfahren zu ihrer herstellung und ihre verwendung Phosphonomethylated Polyvinylamines, process for their production and their use |
| 02/14/1991 | DE3926032A1 Recycling salt bath rinsing water - by solidifying condensed soln. in cone-shaped container into layers of different specific density |
| 02/13/1991 | EP0412630A2 In situ treatment of waste water to prevent ground water contamination |
| 02/13/1991 | EP0412388A2 Process of preparation of fine particles of polymers in powder form |
| 02/13/1991 | EP0412377A2 Mobile self-contained system for on-site recovery of solvents |
| 02/13/1991 | EP0412227A1 Water purification process and apparatus employing polypyrrolidone |
| 02/13/1991 | EP0412175A1 Method for removing nitrogen compounds from a liquid |
| 02/13/1991 | EP0412173A1 Process and installation for the treatment and purification of waste water |
| 02/13/1991 | CN1049143A Environmentally safe method for the removal of residual polyethers from aqueous waste streams |
| 02/13/1991 | CN1049140A Basic aluminum chloride purified agent made by waste catalyzer |
| 02/13/1991 | CN1011584B Process for treating organic waste water by extracting with a third phase |
| 02/12/1991 | US4992644 Device for sterilization, storage and dispensing of liquids |
| 02/12/1991 | US4992408 Catalyst for use in effluent treatment |
| 02/12/1991 | US4992216 Method for producing ozone-containing water |
| 02/12/1991 | US4992213 Aqueous mixture of detergents, surfactants, emulsifiers; nontoxic, biodegradable |
| 02/12/1991 | US4992209 Method for inhibiting corrosion in cooling systems and compositions therefor, containing a nitrite corrosion inhibitor and bromosulfamate |
| 02/12/1991 | US4992199 Adding boehmite |
| 02/12/1991 | US4992181 Catalytic oxidation of toxic sulphur compounds to anion of sulfur |
| 02/12/1991 | US4992180 Bringing chitosan into contact with aqueous solution containing metal |
| 02/12/1991 | US4992179 Contacting aqueous solution containing metal cation with causticized, immobilized bacillus biomass, separation |
| 02/12/1991 | US4992169 Ozone generating means and water quality improving apparatus using the same |
| 02/12/1991 | US4992156 Submerged electrolytic cell wired in existing water circulation piping |
| 02/11/1991 | CA2013904A1 In situ treatment of waste water to prevent ground water contamination |
| 02/09/1991 | WO1991001946A1 Process and device for treating, in particular cleaning, water containing halogenated ethylenes |
| 02/09/1991 | CA2066212A1 Process and device for treating, in particular cleaning, water containing halogenated ethylenes |
| 02/09/1991 | CA2021759A1 Preparation of finely divided polymer powders |
| 02/08/1991 | WO1991001947A1 A device and a method for removing nitrogen compounds from a liquid |
| 02/08/1991 | CA2059542A1 Device and a method for removing nitrogen compounds from a liquid |
| 02/07/1991 | WO1991001277A1 Magnetic fluid conditioner |
| 02/07/1991 | WO1991001276A1 Sewage-treatment plant using the flotation process |
| 02/07/1991 | WO1991001275A1 Water treatment apparatus |
| 02/07/1991 | WO1991001172A1 Method for treatment of pulp which contains cyanides |
| 02/07/1991 | DE3925977A1 Device to separate organic materials from liquids, esp. from water - use closed vessel to prevent escape of odours and reduces oxidn. of organic materials |
| 02/06/1991 | EP0411111A1 Ammonium compound, composition containing it and desinfection method. |
| 02/06/1991 | EP0411052A1 Process for the chemical bonding of heavy metals from sludge in the silicate structure of clays and shales and the manufacture of building and construction materials therewith |
| 02/06/1991 | CN2070734U High efficient combined water cleaner |
| 02/06/1991 | CN2070733U Oil and water separator used in land |
| 02/06/1991 | CN1011537B Barometric direct-contact condenser |
| 02/05/1991 | US4990449 Compost-containing cartridge for biological regeneration of an aquatic medium |
| 02/05/1991 | US4990316 Apparatus for the disolution of ozone in a fluid |
| 02/05/1991 | US4990266 Process for removing the nitrite and/or nitrate content in water |
| 02/05/1991 | US4990263 Melamine-formaldehyde resins in the flocculation of high solids mineral slurries |
| 02/05/1991 | US4990262 Preparation of high solid mineral slurries |
| 02/05/1991 | US4990260 Radiation ionization of water to produce hydroxy free radicals; decomposes organic impurities |
| 02/05/1991 | US4990254 Portable water purifier |
| 02/05/1991 | US4989522 Separation, combustion using plasma arc |
| 02/05/1991 | CA1279831C Device for inward suction of liquid |
| 02/03/1991 | CA2007615A1 Method of improving the quality of large amount of water and the quantity of dissolved oxygen therein, and apparatus for said improvement |
| 02/02/1991 | WO1991001945A1 Process for separating and/or recovering hydrocarbon oils from water using biodegradable absorbent sponges |
| 02/02/1991 | CA2037925A1 Process for separating and/or recovering hydrocarbon oils from water using biodegradable absorbent sponges |
| 02/02/1991 | CA2022401A1 Gravity feed batch filter water purification cartridge having multiple beds |
| 01/31/1991 | DE3924350A1 Switching system for UV-light water steriliser - water flow and UV-light source are controlled so that water is always properly sterilised and no waiting period is required |
| 01/31/1991 | DE3924349A1 Sterilising device for liquids - has inlet nozzle which ensures turbulent flow within UV-light steriliser, improving performance |
| 01/30/1991 | EP0410946A1 Decomposition of detrimental substances |
| 01/30/1991 | EP0410877A1 Composition for chemical and biological purification of polluted water and process for preparation thereof |
| 01/30/1991 | EP0410319A2 Spirogyra controlling and deodorant composition |
| 01/30/1991 | EP0398968A4 Water purification system |
| 01/30/1991 | CN2070296U Super drink water and bactericide liquid producing device |
| 01/30/1991 | CN2070295U Water magnetizing filter |
| 01/30/1991 | CN2070294U Non-power oil/water purifing separator |
| 01/30/1991 | CN2070293U Bag type low position vacuum oxygen remover |
| 01/30/1991 | CN1048838A Method for eliminating excess fluoride from well water |
| 01/30/1991 | CN1048837A Comprehensive treating system for wool washing waste water |
| 01/30/1991 | CN1011405B Process of treatment of para-benzene dicarbonic acid in waste water |
| 01/30/1991 | CN1011404B Method of processing red mud waste product of alumina production |
| 01/30/1991 | CN1011403B Method for regeneration of ion exchanging resin by co2 |
| 01/30/1991 | CN1011385B Method and apparatus for osmotic distillation |
| 01/30/1991 | CN1011378B Increasing oxygen for fish and shrimp by hydrogen peroxide amide carhonate |
| 01/29/1991 | US4988790 Substances for the manufacture of paper |
| 01/29/1991 | US4988484 High efficiency ozone generator for sterilizing, bleaching and the like |
| 01/29/1991 | US4988448 Method for removing substances from a solution |
| 01/29/1991 | US4988444 Prevention of biofouling of reverse osmosis membranes |
| 01/29/1991 | US4988442 Heat treatment, centrifuging, conditioning, drying |
| 01/27/1991 | CA2000282A1 Formulation of stable water based suspensions of mixtures oftrihaloalkyl sulfone |