| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 07/11/1984 | EP0113037A2 Method for producing water soluble resols and use therefor |
| 07/04/1984 | EP0112424A1 Process and plant for treating waste water, especially from dye works |
| 06/26/1984 | US4456535 By hydrolysis and desorption; flowing countercurrent to a heating and stripping gas |
| 06/20/1984 | EP0111379A1 A method of, and apparatus for, purifying waste water |
| 06/12/1984 | CA1169167A1 Mobile fluid purification system |
| 06/05/1984 | CA1168591A1 Grate and water recovery system |
| 05/30/1984 | EP0109497A1 Process for removing heavy metal ash from an aqueous soot suspension |
| 05/29/1984 | US4451341 Electrolytic water sterilization system |
| 05/22/1984 | US4450002 Detoxification of waste water by acidification and rapid flow over aluminum; sewage treatment |
| 05/08/1984 | US4447330 Method of treating waste water |
| 04/17/1984 | CA1165907A1 Method of purifying waste aqueous solutions from heavy metals |
| 04/10/1984 | US4442000 Easily transportable water purification device |
| 04/04/1984 | EP0104648A2 Waste water treatment |
| 03/20/1984 | US4438079 Method for manufacture of arsenious anhydride |
| 03/20/1984 | US4437996 Process for treating cyanic liquid containing copper(I) cyanide complex ion |
| 03/20/1984 | US4437417 Treatment of ferrous salt and base, precipitation of iron cyanide, and separation |
| 03/20/1984 | CA1164146A1 Removal of residual acrylonitrile monomer |
| 03/14/1984 | EP0102436A1 Method for the treatment of organic wastes comprising the separation of toxic materials |
| 03/13/1984 | US4436624 CRT Method of converting and separating substances contained, dissolved or dissolvable in a carrier liquid |
| 03/07/1984 | EP0101830A1 Process for the treatment of spent drilling-mud |
| 03/06/1984 | US4435290 Process for the temporary storage of recyclable liquid wastes in underground salt caverns |
| 02/28/1984 | US4434060 Removal of heavy metals content |
| 02/28/1984 | US4434057 Water purification utilizing plural semipermeable membrane stages |
| 02/28/1984 | CA1162869A1 Extraction of reusable water from a mineral mining process |
| 02/21/1984 | US4432880 Precipitation with soluble sulfide |
| 02/15/1984 | EP0100568A2 Process for the treatment of waste water |
| 02/14/1984 | US4431543 Using an anaerobic-aerobic activated sludge; sewage treatment; pollution control |
| 02/14/1984 | CA1162048A1 Apparatus and method for the reuse and treatment of waste water in fiber glass manufacturing operations |
| 01/31/1984 | US4428840 Anionic and cationic removal of copper from cyanide-containing wastewater |
| 01/24/1984 | USRE31507 Method of treating papermaking white water |
| 01/10/1984 | CA1160370A1 Waste water treatment system for elemental phosphorus removal |
| 01/10/1984 | CA1160059A1 Method and installation for scrubbing the flues for recovering the salts in a process for the production of secondary aluminum |
| 01/04/1984 | EP0097478A2 Process for removal and recovery of mercury from waste water |
| 01/03/1984 | US4424126 Apparatus for removing heavy metals from aqueous liquids |
| 12/27/1983 | US4423007 Removal of radium from aqueous sulphate solutions |
| 12/21/1983 | EP0096377A1 Apparatus for producing highly pure sterile water |
| 12/13/1983 | US4420401 Solution waste treatment |
| 12/13/1983 | US4420369 Bleaching, acidification, sludge |
| 12/06/1983 | US4419247 Method of removing soluble sulfide residue from scrubber water waste |
| 11/30/1983 | EP0095144A1 Treatment of condensates from gases |
| 11/29/1983 | CA1157972A1 Water softening and reverse osmosis system |
| 11/22/1983 | US4416780 Method to upgrade sewage treatment plants overloaded in continuous operation |
| 11/22/1983 | US4416767 Method and apparatus for the removal of excess sodium reagent and byproducts of reaction produced during the destruction and removal of polychlorinated biphenyls from oil |
| 11/15/1983 | US4415461 Using a mixture of sulfuric and nitjric acid and heating; detoxification |
| 11/15/1983 | US4415456 Removal and destruction of residual nitrate esters in wastewater |
| 10/26/1983 | EP0092108A2 Process for the treatment of acid waste water containing aluminium and iron |
| 10/18/1983 | CA1155404A1 Portable water purifier especially for domestic use |
| 10/05/1983 | EP0090515A2 Treatment of solutions to facilitate the removal of ferric iron therefrom |
| 10/04/1983 | US4408030 Waste chlorosilane treatment |
| 09/28/1983 | EP0089783A1 Waste chlorosilane treatment |
| 09/06/1983 | US4402920 Anionic hydrolyzed polyacrylamide flocculant |
| 09/06/1983 | US4402837 Reacting with metal hydroxide |
| 09/06/1983 | US4402836 Ultraviolet radiation catalyzed chlorination |
| 09/06/1983 | US4402833 Precipi-tation as incoluble phosphates, filtration, treatment of filtrate with active carbon |
| 08/30/1983 | US4401573 Formation of chromium hydroxide from chromium oxide |
| 08/16/1983 | CA1152017A1 Treatment of brackish water |
| 07/27/1983 | EP0084285A2 Process for treating aromatic amines containing waste waters |
| 07/26/1983 | US4395337 Treatment of brackish water |
| 07/12/1983 | US4392959 Basification, precipitation, two-stage reverse osmosis |
| 07/12/1983 | CA1149582A1 Synthetic rhombohedrol magnetite pigment |
| 07/05/1983 | US4391715 Waste treatment process |
| 06/29/1983 | EP0082135A1 Apparatus for preventing bacterial passage |
| 06/21/1983 | CA1148674A1 Separation of terpenic compounds in industrial effluents from resinous wood treatment |
| 06/15/1983 | EP0081213A1 Process for the depollution of effluents from ammonium nitrate production and recuperation of the elements in these effluents |
| 06/08/1983 | EP0080867A1 Process for treating cyanic liquid containing copper (I) cyanide complex ion |
| 06/07/1983 | US4387029 Oxidation at above 60 and an alkaline ph; water treatment; reuse |
| 06/07/1983 | US4387025 Purifying contaminated water |
| 05/24/1983 | CA1146972A1 Waste water treatment in the production of methacrylic acid |
| 05/17/1983 | US4383920 Plurality of treatment tanks on trailer |
| 05/11/1983 | EP0078329A1 Process for the removal of cyanide from an aqueous solution |
| 05/10/1983 | US4382863 Sludge dewatering system |
| 05/10/1983 | US4382859 For a plating line |
| 05/10/1983 | US4382822 Synthetic rhombohedral magnetite pigment |
| 05/03/1983 | CA1145866A1 Sewage and waste water treatment |
| 04/26/1983 | US4381288 Mercury brine sludge treatment |
| 04/26/1983 | CA1145488A1 Water purification equipment |
| 04/26/1983 | CA1145487A1 Removal of radium from aqueous sulphate solutions |
| 04/05/1983 | CA1144082A1 Process for combined waste utilization and the clarification of waste water and a multi-stage filtration device for the performance of the process |
| 03/29/1983 | CA1143875A1 High efficiency filtration with impurity concentration and ultrafiltration rejection flow recirculation |
| 03/29/1983 | CA1143718A1 Lubricant composition |
| 02/16/1983 | EP0072012A2 Treatment of industrial wastewater |
| 02/15/1983 | US4374028 Process for waste water purification |
| 02/08/1983 | CA1141048A1 Treatment of metal plating wastes with an unexpanded vermiculite cation exchange column |
| 02/01/1983 | CA1140585A1 Treatment of byproduct steam from adipic acid manufacture |
| 02/01/1983 | CA1140491A1 Method of removing contaminants from water |
| 01/18/1983 | US4369194 Process for treating manures |
| 01/11/1983 | US4368070 Method for scrubbing the flues and for recovering _the salts in a process for the production of secondary aluminum |
| 01/05/1983 | EP0068582A2 Purification process of water containing organic pollutants |
| 01/04/1983 | US4367145 Portable water clarifier |
| 12/29/1982 | EP0067959A2 Transportable apparatus for treating used emulsions, solutions and waste waters |
| 12/23/1982 | WO1982004481A1 Apparatus for preventing bacterial passage |
| 12/21/1982 | US4364773 Demetallization of waste water to yield filler for asphalt paving |
| 12/09/1982 | WO1982004197A1 Mobile fluid purification system |
| 12/08/1982 | EP0066417A1 Method of clarifying proteinaceous waste water containing solid impurities |
| 12/07/1982 | US4362629 Method for processing solution including heavy metal |
| 11/23/1982 | US4359789 Sewerless disposal system |
| 11/09/1982 | US4358360 Dewaxing process |
| 11/02/1982 | CA1134965A1 Method and equipment for processing of organic materials containing nitrogen compounds |
| 10/27/1982 | EP0063560A1 Process for the simultaneous purification and detoxication of waste waters or solutions that contain Cr (VI) |
| 10/19/1982 | US4354936 Anaerobic digestion process |