| Patents for B03D 1 - Flotation (8,101) |
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| 07/04/1991 | DE3943339A1 Desulphurising exhaust gas plaster recovery - uses flotation of output from hydro cyclone to separate discoloured particles and leave bright plaster for recycling |
| 06/26/1991 | CN1052439A Floatation of iron ore with acidic medium in fill-type static floatation column |
| 06/26/1991 | CN1012945B Flotation machine for separating mineral |
| 06/11/1991 | US5023021 Cartridge venturi |
| 06/11/1991 | US5022983 Process for cleaning of coal and separation of mineral matter and pyrite therefrom, and composition useful in the process |
| 06/06/1991 | WO1991008038A1 Method and apparatus for effecting gas-liquid contact |
| 06/05/1991 | CN1012714B Flotation machine for mineral-dressing |
| 06/04/1991 | US5021165 Centrifuge used to precondition a mixture before admission to flotation device |
| 05/28/1991 | US5019245 Method for recovery of hydrocarbons form contaminated soil or refuse materials |
| 05/28/1991 | US5019244 Method of separating mineral particles by froth flotation |
| 05/28/1991 | CA1284471C Separation process |
| 05/22/1991 | EP0428257A2 Flotation machine for de-inking |
| 05/14/1991 | US5015368 Ore flotation process using carbamate compounds |
| 05/14/1991 | US5015367 Alkylated diaryl oxide monosulfonate collectors useful in the floatation of minerals |
| 05/07/1991 | US5013359 Oxidized with nitric acid, froth flotation |
| 05/01/1991 | CN1051062A Deinking and bleaching secondary fiber |
| 05/01/1991 | CN1012469B Mineral separating technology for separating fcce ore and monazite with floation |
| 04/30/1991 | US5011597 Single cell vertical static flow flotation unit |
| 04/30/1991 | US5011596 Method of depressing readily floatable silicate materials |
| 04/30/1991 | US5011595 Combination feedforward-feedback froth flotation cell control system |
| 04/24/1991 | CN1012420B Surfactant mixtures as collectors for flotation of non-sulfidic ores |
| 04/23/1991 | US5009792 Method for clarifying aqueous salt solutions |
| 04/20/1991 | WO1991005612A1 Method and apparatus for separation by flotation in a centrifugal field |
| 04/20/1991 | CA2069959A1 Method and apparatus for separation by flotation in a centrifugal field |
| 04/16/1991 | US5008006 Chemical conditioning of fine coal for improved flotation and pyrite rejection |
| 04/14/1991 | WO1991005760A1 Ion flotation with anionic reagents |
| 04/14/1991 | CA2069304A1 Ion flotation with anionic reagents |
| 04/10/1991 | EP0421555A1 Method and device for separating liquid and a second substance |
| 04/06/1991 | CA2026901A1 Method and device for separating liquid and a second substance |
| 03/27/1991 | CN1012138B Sepn. of lead from polymetallic based sulfide ore of lead and zinc |
| 03/21/1991 | WO1991003596A1 Use of compounds containing polyalkylene oxide chains and nitrogen for removing printing ink from recycled printed paper and/or paper processing water |
| 03/20/1991 | CN1049984A Collectingagent for selective flotation of lead and zinc ores and usage thereof |
| 03/20/1991 | CN1012040B Technology for decarbonizing wet clarifying dregs of f-bearing smoke |
| 03/13/1991 | EP0375739A4 Water clarification system adapted for removing particulate matter of greater than a predetermined size |
| 03/13/1991 | CN1011945B Method for froth flotation using collector composition |
| 03/12/1991 | US4998624 Method of separating carbonaceous components from particulate coal containing inorganic solids and apparatus therefor |
| 03/07/1991 | DE3928841A1 Deinken von altpapieren Deinking wastepaper |
| 03/07/1991 | DE3928599A1 Verfahren zur altpapieraufbereitung in gegenwart polyalkylenoxidketten- und stickstoffhaltiger verbindungen Polyalkylenoxidketten- method for waste paper in preparation of nitrogen-containing compounds present and |
| 03/06/1991 | EP0414711A1 Flotation apparatus |
| 03/05/1991 | US4997550 Slurrying with biocide to brighten |
| 03/05/1991 | US4997549 Air-sparged hydrocyclone separator |
| 03/01/1991 | WO1991003598A1 Use of at least partly water-soluble polymers for removing printing ink from printed waste paper and/or recycling water in the papermaking industry |
| 03/01/1991 | WO1991003597A1 Flotation process for removing fillers from waste paper in the presence of polymers and copolymers |
| 03/01/1991 | CA2066634A1 Flotation process for removing fillers from waste paper in the presence of polymers and copolymers |
| 03/01/1991 | CA2065256A1 Use of at least partly water-soluble polymers for removing printing ink from printed waste paper and or recycling water in the papermaking industry |
| 02/27/1991 | CN1011765B Process for foam flotation of s-contg. ore |
| 02/26/1991 | US4995998 Surfactant mixtures as collectors for the flotation of non-sulfidic ores |
| 02/26/1991 | US4995965 Calcium carbonate beneficiation |
| 02/19/1991 | US4994182 Apparatus for the thickening by floatation of slurries produced during the treatment of waters |
| 02/19/1991 | CA1280520C Method of separating non-sulfidic minerals by flotation |
| 02/06/1991 | EP0410971A1 Process for treating contaminated soil |
| 02/06/1991 | CN1011490B Improved flotation mechanism |
| 02/05/1991 | US4990656 Polyamine substituted dithiocarbamate and process for producing the same |
| 02/05/1991 | US4990246 Separator for two non-miscible liquids |
| 01/30/1991 | CN2070203U Liquid level indicator for mine slurry |
| 01/27/1991 | WO1991001809A1 A method of operating a plurality of minerals separation flotation cells |
| 01/27/1991 | CA2044598A1 Method of operating a plurality of minerals separation flotation cells |
| 01/23/1991 | EP0372057A4 Depressant for flotation separation of polymetallic sulphidic ores |
| 01/23/1991 | CN1048665A Floatation machine for collophane ore |
| 01/23/1991 | CN1011296B Process for flotating non-sulfidic ores |
| 01/23/1991 | CN1011295B Process for flotation of non-sulfidic ores |
| 01/23/1991 | CN1011294B Process for dressing copper oxide ore |
| 01/22/1991 | US4986903 Induced static single flotation cell |
| 01/10/1991 | WO1991000250A1 Device for flotation treatment of sewage |
| 01/09/1991 | CN2068864U 可调式位置控制器 Adjustable position controller |
| 01/02/1991 | EP0406048A1 Method and device for the injection of fluids into a flotation tank |
| 01/01/1991 | USH871 Separation of molybdenite from copper mining by-product |
| 01/01/1991 | US4981582 Process and apparatus for separating fine particles by microbubble flotation together with a process and apparatus for generation of microbubbles |
| 12/26/1990 | CA2019790A1 Method and apparatus for generating microbubbles in froth flotation mineral concentration systems |
| 12/19/1990 | EP0402737A2 Process and apparatus for the treatment of sludges containing heavy metals |
| 12/18/1990 | CA1278111C Neutral hydrocarboxycarbonyl thionocarbamate sulfide collectors |
| 12/18/1990 | CA1278110C Neutral hydrocarboxycarbonyl thiourea sulfide collectors |
| 12/18/1990 | CA1278109C Silica depressant in froth flotation of sulfide ores |
| 12/13/1990 | WO1990014892A1 Method of recovery of hydrocarbons from contaminated soil or refuse materials |
| 12/09/1990 | CA2060508A1 Removal of contaminants |
| 12/06/1990 | DE3918213A1 Sepn. of solid particles suspended in liq. - involves tank with inlet pipe with curved guide vanes |
| 12/06/1990 | DE3918025A1 Flotationsapparat Flotation apparatus |
| 12/05/1990 | EP0401089A1 Device for clarifying liquids, particularly: water, fruit juice, grape mash and similar |
| 12/05/1990 | CN1047462A Differential flotation for zircon in seashore placer deposit |
| 11/27/1990 | US4972956 Method of removing carbonaceous particles, essentially free of pyritic sulphur, from an aqueous coal slurry |
| 11/22/1990 | DE3690783C2 Oxide copper mineral concn. by flotation - involving pre-sulphidation with molten sulphur |
| 11/20/1990 | US4971731 Method and apparatus for generating microbubbles in froth flotation mineral concentration systems |
| 11/20/1990 | US4971685 Bubble injected hydrocyclone flotation cell |
| 11/14/1990 | EP0116616B1 Process for the selective separation of base metal sulfides and oxides contained in an ore |
| 11/13/1990 | US4969775 Process of dressing contaminated soils |
| 11/13/1990 | CA1276322C Froth flotation method and apparatus |
| 11/06/1990 | US4968416 1,4-disubstituted-2,3,5,6-tetrahydroxy-1,4-diphosphorinanes and their oxides or sulfides and their use in froth flotation |
| 11/06/1990 | US4968415 Alkenylsuccinic acid monoester |
| 10/30/1990 | US4966712 Flotation collector and method for treatment of inorganic substance-containing water system by use thereof |
| 10/30/1990 | US4966688 Ore flotation employing amino mercaptothiadiazoles |
| 10/30/1990 | US4966687 Method and apparatus for column flotation of mineral matter |
| 10/23/1990 | US4964981 Screening, grinding, multistage flotation |
| 10/23/1990 | US4964576 Method and apparatus for mineral matter separation |
| 10/10/1990 | EP0391042A1 Method of controlling a flotation plant |
| 10/07/1990 | CA2014216A1 Process for controlling a flotation device |
| 10/04/1990 | CA2009936A1 Fossil resin flotation from coal by selective coagulation and depression of coal |
| 10/02/1990 | US4960509 Ore flotation device and process |
| 10/02/1990 | CA1274924A1 Ore flotation with combined collectors |
| 09/29/1990 | CA2010904A1 Flotation apparatus |
| 09/28/1990 | WO1990011133A1 Centrifugal flotation apparatus and method |