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5000389 Kerogen agglomeration process for oil shale beneficiation
0892-6875/92 $5.00 + 0.00 Pergamon Press Ltd
Minerals Engineering, Vol. 5, Nos 10-12, pp. 1469-1474, 1992 Printed in Great Britain
NEW PATENTS
This section contains abstracts and, where appropriate, illustrations of recently issued United States patents and published patent application filed from over 30 countries under the Patent Cooperation Treaty. This information was obtained from recent additions to the PATSEARCHs’ online database in accordance with interest profiles developed by the Editors. Further information about online patent searching can be obtained from Research on Demand, Inc., 2421 Fourth Street, Ste. C., Berkeley, CA 94710, U.S.A. [Tel. 510-841 1145; Fax 510-841 63111.
4997550
5000783
METHOD FOR IMPROVED FLOTATION OF DISCOLORING IMPURITIES FROM KAOLINITE
MODIFIED NATIVE STARCH BASE BINDER FOR PELLETIZING MINERAL MATERIAL
Gary Cobb, Dursun E Ince assigned to ECC America Inc
David L Dingeman, William Skagerberg signed to Oriox Technologies Inc
as-
Flotation of a kaolin clay slurry to remove titanium-based impurities is improved by adding a biocide to the slurry prior to the flotation and effecting the flotation in the presence of the biotide. The addition of the biocide improves the efficacy of flotation and thereby increases the brightness of the clay. Preferred biocides are tetrahydrothiadiazine thiones, especially tetrahydro-3,5-dimethyl-2H-1 3,5thiadiazine2-thione.
A binder for pelletizing particulate mineral material. The binder including about 50-99.5x modified native starch, and about 0.5-50% of water-dispersible polymer material selected from the group consisting of water-dispersible nature water-dispersible pectins, watergums, dispersible starch derivatives, water-dispersible cellulose derivatives, water-dispersible vinyl polymers, water-dispersible acrylic polymers and mixtures thereof. An iron ore concentrate is also disclosed as are mineral ore and iron ore pellets. In addition, methods of binding particulate mineral material and of making mineral ore pellets are also disclosed.
5006226
5000389
FLUIDIZED, DRY BED, ORE CONCENTRATOR
KEROGEN AGGLOMERATION PROCESS FOR OIL SHALE BENEFICIATION
Leo 0 Burt A fluidized, dry bed, ore concentrator in which a uniform air stream is utilized to fluidize ore particles within a region defined in part by two, moving, riffled surfaces. The particles are statically charged to enhance separation of particles within the fluidized mass. The less massive of the like-charged, fluidized particles are drawn off by a first riffled surface and denoted tailings . The more massive, and valuable, of the particles are drawn off by the second of the two riffled surfaces and denoted as fines .
Bernard Y C So, Terry L Marker assigned to Amoco Corporation In a kerogen agglomeration process, a substantial amount of the oil shale is comminuted to a top size greater than about 0.4 to 8 in. prior to kerogen agglomeration. Kerogen agglomeration includes comminuting the oil shale in the presence of an added organic liquid and water to form kerogen-rich agglomerates and mineralrich particles. 1469
Minerals Engineering, Vol. 5, Nos 10-12, pp. 1469-1474, 1992 Printed in Great Britain
NEW PATENTS
This section contains abstracts and, where appropriate, illustrations of recently issued United States patents and published patent application filed from over 30 countries under the Patent Cooperation Treaty. This information was obtained from recent additions to the PATSEARCHs’ online database in accordance with interest profiles developed by the Editors. Further information about online patent searching can be obtained from Research on Demand, Inc., 2421 Fourth Street, Ste. C., Berkeley, CA 94710, U.S.A. [Tel. 510-841 1145; Fax 510-841 63111.
4997550
5000783
METHOD FOR IMPROVED FLOTATION OF DISCOLORING IMPURITIES FROM KAOLINITE
MODIFIED NATIVE STARCH BASE BINDER FOR PELLETIZING MINERAL MATERIAL
Gary Cobb, Dursun E Ince assigned to ECC America Inc
David L Dingeman, William Skagerberg signed to Oriox Technologies Inc
as-
Flotation of a kaolin clay slurry to remove titanium-based impurities is improved by adding a biocide to the slurry prior to the flotation and effecting the flotation in the presence of the biotide. The addition of the biocide improves the efficacy of flotation and thereby increases the brightness of the clay. Preferred biocides are tetrahydrothiadiazine thiones, especially tetrahydro-3,5-dimethyl-2H-1 3,5thiadiazine2-thione.
A binder for pelletizing particulate mineral material. The binder including about 50-99.5x modified native starch, and about 0.5-50% of water-dispersible polymer material selected from the group consisting of water-dispersible nature water-dispersible pectins, watergums, dispersible starch derivatives, water-dispersible cellulose derivatives, water-dispersible vinyl polymers, water-dispersible acrylic polymers and mixtures thereof. An iron ore concentrate is also disclosed as are mineral ore and iron ore pellets. In addition, methods of binding particulate mineral material and of making mineral ore pellets are also disclosed.
5006226
5000389
FLUIDIZED, DRY BED, ORE CONCENTRATOR
KEROGEN AGGLOMERATION PROCESS FOR OIL SHALE BENEFICIATION
Leo 0 Burt A fluidized, dry bed, ore concentrator in which a uniform air stream is utilized to fluidize ore particles within a region defined in part by two, moving, riffled surfaces. The particles are statically charged to enhance separation of particles within the fluidized mass. The less massive of the like-charged, fluidized particles are drawn off by a first riffled surface and denoted tailings . The more massive, and valuable, of the particles are drawn off by the second of the two riffled surfaces and denoted as fines .
Bernard Y C So, Terry L Marker assigned to Amoco Corporation In a kerogen agglomeration process, a substantial amount of the oil shale is comminuted to a top size greater than about 0.4 to 8 in. prior to kerogen agglomeration. Kerogen agglomeration includes comminuting the oil shale in the presence of an added organic liquid and water to form kerogen-rich agglomerates and mineralrich particles. 1469