| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 04/21/1992 | US5106500 Portable water purification system including a filter cleaning mechanism |
| 04/21/1992 | US5106495 Portable water purification device |
| 04/21/1992 | US5106493 Gray-water reclamation and reuse system |
| 04/20/1992 | WO1992006925A1 Apparatus and method for hydrolysis of cyanide-containing liquids |
| 04/16/1992 | WO1992005838A1 Dichloromethane abatement |
| 04/16/1992 | DE4032050A1 Verwendung von polyetherkettenhaltigen verbindungen, hergestellt aus epoxidierten carbonsaeurederivaten, zur entfernung von druckfarben aus altpapieren und/oder papierkreislaufwaessern Use of compounds containing polyether chains prepared from epoxidized carbonsaeurederivaten, wastepaper for removal of printing inks and / or papierkreislaufwaessern |
| 04/15/1992 | EP0480243A1 A method for purifying waste and/or drinking water |
| 04/15/1992 | EP0480055A1 Method of purifying lacustrine water and filthy water purification boat |
| 04/15/1992 | CN2101670U Device for removing heavy metal ion from waste water |
| 04/14/1992 | US5104550 Precipitation of carbonate or bicarbonate ions with excess calcium hydroxide and removal; ozone and hydrogen peroxide oxidants |
| 04/14/1992 | US5104525 Portable self-contained water remediation package |
| 04/14/1992 | CA1298923C Process for treating waste water containing uranium and fluorine |
| 04/10/1992 | WO1992006240A1 Use of polyether-chain-containing compounds produced from epoxidised carboxylic acid derivatives for removing printing inks from waste paper and/or paper circuit water |
| 04/10/1992 | CA2093813A1 Use of compounds containing polyether chains prepared from epoxidized carboxylic acid derivatives for the removal of printing inks from wastepaper and/or paper circuit waters |
| 04/07/1992 | US5102556 Method for rendering ferric hydroxide sludges recyclable |
| 04/07/1992 | US5102503 Mobile self-contained system for on-site recovery of solvents |
| 04/02/1992 | WO1992004969A1 Water dispenser |
| 04/02/1992 | DE4129732A1 Appts. for cleaning waste water - comprises water container, pump, drive system, carbonising chamber and filter contg. activated carbon |
| 03/31/1992 | US5100559 Treatment methods for breaking certain oil and water emulsions |
| 03/24/1992 | US5098578 Precipitation of metals |
| 03/24/1992 | US5098562 Apparatus for treating deaerated water |
| 03/24/1992 | US5098538 Electroacoustic soil decontamination |
| 03/20/1992 | WO1992005118A1 REMOVAL OF AOX FROM BLEACH PLANT MILL EFFLUENTS BY pH SHIFT USING THE ALKALINITY/ACIDITY SOURCES AVAILABLE AT THE MILL |
| 03/19/1992 | WO1992004660A1 Effluent treatment |
| 03/18/1992 | EP0475289A1 Method of recovering nickel |
| 03/18/1992 | EP0474936A1 Electrochemical process for purifying chromium-containing wastes |
| 03/18/1992 | EP0474754A1 A method for the forced anaerobic decomposition of waste material. |
| 03/18/1992 | CN1059506A Technology for processing effluent of priming dinitrodiazophenol prodn. |
| 03/17/1992 | US5096599 Process for purifying the effluent from urea production plants |
| 03/17/1992 | US5096596 Process and apparatus for removal of mineral contaminants from water |
| 03/17/1992 | CA1297263C Method and apparatus for sterilizing aqueous media, more particularly drinking water |
| 03/14/1992 | CA2051016A1 Nickel recovery process |
| 03/12/1992 | DE4028529A1 Domestic water purifier - has filters, chemical cleaning and sterilising units, bar-coded filter elements and microprocessor control |
| 03/11/1992 | CN1059322A Alkaliferous industrial waste water and waste slag treatment method |
| 03/10/1992 | US5094743 Fluid purifying apparatus and method of purifying fluids |
| 03/10/1992 | CA1297212C Method of oxidizing sulfide-containing liquor |
| 03/05/1992 | DE4027880A1 Cleaning of waste material from building industry - by separating fine sand before adding flocculating medium |
| 03/04/1992 | EP0472705A1 Method and apparatus for treatment of liquid photographic processing wastes. |
| 03/03/1992 | US5093007 Process for removal of inorganic and cyanide contaminants from wastewater |
| 03/03/1992 | US5092998 Device for treating oil sludge and oil-containing waste water |
| 03/03/1992 | US5092563 Apparatus for recovery of heavy metals from highly concentrated wastewater solutions |
| 02/27/1992 | DE4026357A1 Mobile process and appts. for removing metals from solids - or aq. suspensions or liq(s) comprising units connected together |
| 02/26/1992 | EP0471784A1 Method and composition for treating waste water. |
| 02/26/1992 | EP0471772A1 Water purification process |
| 02/25/1992 | US5091093 Process for purifying acrylonitrile effluent |
| 02/25/1992 | US5091080 Core enclosed by semipermeable membrane |
| 02/20/1992 | DE4121971A1 Disposal of contaminated liquids - comprises thickening liq.-solid mixt. then drying in fluidised bed dryer to produce granular material suitable for dumping |
| 02/18/1992 | US5089470 Compositions containing poly (γ-glutamylcysteinyl)glycines |
| 02/18/1992 | US5089141 Chemical process for removing selenium from water |
| 02/18/1992 | US5089120 Treatment vessel for bodies of water with laterally adjustable pontoons |
| 02/12/1992 | EP0470931A2 Soil and waste water treatment |
| 02/12/1992 | CN1058575A Method for treating waste water containing discards from filature |
| 02/11/1992 | US5087373 Process for removing titanium and zirconium from aqueous solutions |
| 02/11/1992 | US5087370 Method and apparatus to detoxify aqueous based hazardous waste |
| 02/06/1992 | DE4024769C1 Treatment of sludge contg. toxic heavy metals - comprises treating with excess hydrochloric acid, concentrating by thermal evapn. and distilling |
| 02/05/1992 | EP0469977A1 Vacuum sanitary installation having a gaseous fluid cleaner |
| 02/05/1992 | EP0469211A1 Bacteriostatic water and method for producing the same |
| 02/04/1992 | CA1295283C Electroplating system with rinse tank and evaporator for contaminated effluent |
| 01/29/1992 | CN2094550U Industrial sewage processing machine |
| 01/29/1992 | CN1058202A Technology for treatment of waste liquid pollution in small paper pulp mill |
| 01/28/1992 | US5084180 Method for treating zinc-containing sulfate solution |
| 01/28/1992 | US5084168 System for removing substances from a solution |
| 01/28/1992 | US5084165 Water treatment apparatus |
| 01/28/1992 | US5083442 Refrigerator with purified water supply |
| 01/23/1992 | WO1992000918A1 A process for the purification of water |
| 01/21/1992 | US5082053 Arrangement for cleaning contaminated ground water |
| 01/21/1992 | US5081954 Method of raising fish |
| 01/15/1992 | EP0465968A1 Process for the treatment of acrylonitrile waste water |
| 01/14/1992 | WO1992000792A1 Method and device for purifying air |
| 01/14/1992 | US5080806 Decontamination treatment of process water |
| 01/14/1992 | CA2086927A1 Method and device for purifying air |
| 01/07/1992 | US5078899 Removal Of Ferric Hydroxide |
| 01/07/1992 | US5078881 Decontamination process |
| 01/07/1992 | US5078876 Apparatus for multistage purification of water |
| 01/02/1992 | DE4026714A1 Mobile system for dewatering and drying sewage sludge - has decanter and fluidised bed dryer on articulated road trailer with hydraulic system for reducing height of equipment during transport |
| 12/31/1991 | US5076927 Fermentation by sulfur reducing bacteria; sulfiding, methanati on |
| 12/31/1991 | US5076913 Fluid purifying apparatus and method of purifying fluids |
| 12/27/1991 | EP0462606A1 Method and system for producing sterile aqueous solutions |
| 12/26/1991 | WO1991019555A1 Water purification system with filter cleaning mechanism |
| 12/24/1991 | US5075010 Flowing aerated water containing ferrous ions over matrix particles gives membrane for rapid oxidation, demetallization |
| 12/18/1991 | EP0461785A1 Method for treatment of wastewater containing polyether polyols |
| 12/18/1991 | EP0461686A1 Process for separating titanium und zirconium from aqueous solutions |
| 12/18/1991 | EP0461385A1 Process for the treatment of wastewaters from gasification plants operating under high pressures |
| 12/17/1991 | US5073280 Composition for inhibiting stress cracks in plastic articles and methods of use therefor |
| 12/17/1991 | US5073271 Mixing scrubber waste liquids with sludge, flocculation, filtr ation, combustion of filter cake |
| 12/17/1991 | US5073268 Oxidation, hydrogen gas, uv rad, ion exchange resins |
| 12/11/1991 | EP0461073A1 Device for wet oxidation |
| 12/11/1991 | EP0432250A4 Process for reducing the cyanide content of a solution |
| 12/10/1991 | US5071551 Water purifier |
| 12/10/1991 | US5071548 Fluid purifying apparatus and method of purifying fluids |
| 12/10/1991 | CA1293067C System for water treatment with ozone |
| 12/09/1991 | WO1991018943A1 Composition for inhibiting stress cracks in plastic articles and methods of use therefor |
| 12/04/1991 | EP0459868A1 Process for removing dissolved metals from water |
| 12/04/1991 | EP0459194A1 Process for the thermal disposal of sludge |
| 12/04/1991 | CN1014980B Treatment of mercury contaminated lakes |
| 12/03/1991 | US5069796 System for removing volatile components from water derived from wells |
| 12/03/1991 | US5069787 Method and apparatus for removing cyanide from a fluid |
| 12/03/1991 | US5069785 Fluid purifying apparatus and method of purifying fluids |
| 12/03/1991 | US5069783 Liquid treatment apparatus |
| 12/03/1991 | US5069782 Fluid purification systems |