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| Number | Title | Issue Date |
| 4268380 | Froth flotation process An improvement in the froth flotation separation of metallic sulfide mineral ores, particularly those ores bearing copper and molybdenum, in which a mercaptan collector is used in an earlier primary flotation stage, the improvement comprising the addition... | 05/19/1981 |
| 4246096 | Flotation process A method for separating copper sulphides from lead sulphides contained in particulate copper lead sulphide concentrates by a flotation process in which an aqueous alkali metal silicate-alkali metal dichromate reagent solution is added in the flotation ste... | 01/20/1981 |
| 4231859 | Molybdenite flotation Molybdenite (MoS2) is recovered from copper sulfide flotation concentrates by froth flotation utilizing steam-air injection into the concentrate flotation pulp at a temperature of about 70° to 100° C. in the presence of activated carbon and s... | 11/04/1980 |
| 4229287 | Tin flotation Tin values in the form of cassiterite (SnO2) are recovered from aqueous pulps of finely divided cassiterite-bearing ore, preconcentrate or concentrate by froth flotation. The ore pulps are deslimed thoroughly, partially or not at all. Slimes, g... | 10/21/1980 |
| 4220525 | Beneficiation of metallic ores by froth flotation using polyhydroxy amine depressants Beneficiation of metallic ores by froth flotation using polyhydroxy amines depressants for gangue material, such as silica, silicates, carbonates, sulfates, phosphates to obtain pure concentrates of desired metal values with adequate collectors; comprises... | 09/02/1980 |
| 4211642 | Beneficiation of coal and metallic and non-metallic ores by froth flotation process using polyhydroxy alkyl xanthate depressants Beneficiation of coals, metallic, and non-metallic ores by froth flotation process using polyhydroxy alkyl xanthate depressants for pyrite in coals, or in metallic and non-metallic ores to obtain pyrite sulfur free coal, as well as pyrite free metallic or... | 07/08/1980 |
| 4208275 | Froth flotation using lanolin modifier Lanolin is employed as a modifier for froth flotation utilizing conventional collectors such as fatty acids, kerosene, and the like. Lanolin added to the system acts as a depressant which assists in the selectivity of the process for the desired mineral o... | 06/17/1980 |
| 4208487 | Novel frother composition for beneficiation of mineral ores A combination of conventional frothing agent and a particular amino-aldehyde resin provides better recovery of mineral values than can be obtained with either agent alone.... | 06/17/1980 |
| 4196073 | Hydrophilic thio compounds as selective depressants in the flotation separation of copper and molybdenum A process for separating molybdenite from copper sulphide and other metal sulphide minerals with which it is associated in a metallurgical concentrate through use of a copper sulphide depressant which is a compound having at least one nitrogen atom, at le... | 04/01/1980 |
| 4157296 | Flotation process for fluoride minerals Flotation processes are provided, wherein a vinyl sulfonic acid polymer or an allyl sulfonic acid polymer is added to the pulp in a minor amount as a depressant for constituents which preferably should be floated to a minimum degree. Thus the polymers are... | 06/05/1979 |
| 4139455 | Materials and processes for flotation of mineral substances This invention provides a method of concentrating a metaliferous ore containing also substantial quantities of pyrites and/or pyrrhotite and/or sphalerite and comprises subjecting an aqueous pulp of the ore to a froth flotation process in the presence of ... | 02/13/1979 |
| 4136019 | Production of high purity fluorspar and barite concentrates from a complex fluorspar ore Beneficiation of complex non-sulfide ores such as fluorspar is effected by flotation using organic compounds containing the CF3 group as selectivity agents.... | 01/23/1979 |
| 4132633 | Method for separating mixture of plastics A method for separating a mixture of plastics of at least two components selected from the group consisting of polyethylene, polypropylene and a polystyrene, which comprises placing the mixture of plastics in a separation cell containing an aqueous liquid... | 01/02/1979 |
| 4113106 | Process of tin flotation An improved tin flotation process is disclosed. Tin ores are subjected to flotation using sulfurous acid and/or sulfite in the flotation pulp to produce improved tin concentrates.... | 09/12/1978 |
| 4078993 | Processes for flotation of mineral substances A method of concentrating a metalliferous ore containing also substantial quantities of pyrites and/or pyrrhotite and/or sphalerite and comprises subjecting an aqueous pulp of the ore to a froth flotation process in the presence of a depressant and in whi... | 03/14/1978 |
| 4055485 | Method for improving clay brightness utilizing magnetic separation A method for brightening a kaolin clay wherein an aqueous dispersion is initially formed of said clay, which dispersion is blunged and conditioned and the resultant slurry thereupon subjected to a froth flotation treatment to remove titaniferous impuritie... | 10/25/1977 |
| 4054516 | Method for selectively capturing metal ions A method for selectively capturing metal ions by treating a solution conting ions of heavy metals, such as cupric ions, zinc ions, etc., at an adjusted pH value with a metal capturing agent comprising a condensation product of a higher fatty acid or deri... | 10/18/1977 |
| 4043455 | Beneficiation of fluorspar ore A method is disclosed for beneficiating a fluorspar concentrate containing apatite as a gangue mineral, which includes further concentrating the fluorspar by a froth flotation process wherein the apatite is collected and floated with a cationic reagent in... | 08/23/1977 |
| 4014474 | Method for treating particulate masses from complex ores or ore products by froth flotation A flotation concentrate in the form of a water suspension is treated with a reagent that nullifies the effect of previously used collectors. The suspension is filtered, and subjected to a mechanochemical treatment that includes chemical conditioning of th... | 03/29/1977 |
| 4008151 | Process for enrichment, by flotation, of phosphate ores with gangues containing carbonates A process for dressing phosphate ores with gangues containing carbonates, by flotation, wherein the phosphates and carbonates contained in the ore to be treated are separated by subjecting the ore to a reverse flotation treatment utilizing a combination o... | 02/15/1977 |
| 3977835 | Cooling process for selective salt crystallization Salable salt values in a complex brine are recovered by cooling to crystallize mirabilite, then using solar evaporations to recover readily processable groupings of sodium salts and potassium salts.... | 08/31/1976 |
| 3968032 | Process for concentrating lead and silver by flotation in products which contain oxidized lead A flotation process for recovering lead and silver values from electrolytic zinc residues is disclosed. BACKGROUND OF THE INVENTION The present invention relates to a process for reclaiming silver and lead by flotation in products containing oxidized lead such... | 07/06/1976 |
| 3933625 | Electrical preconditioning in a selective flotation of sulfide ores A flotation method for sulfide ores in which, prior to sulfide ore flotation for effecting a mutual separation of the ore constituents, there is carried out a pre-treatment or conditioning step by applying d-c current to the sulfide ore slurry by means of... | 01/20/1976 |
| 3932271 | Electric preconditioning in selective flotation of oxidic type ores In the flotation of oxide ores, a method of flotation characterized by applying d-c current to the oxide ore slurry as a pre-treatment prior to flotation.... | 01/13/1976 |
