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41. 发明公开

US20240174540A1 METHODS FOR RECOVERING FLY ASH USING A SELECTIVE FLOCCULANT 审中-公开
公开(公告)号：US20240174540A1
公开(公告)日：2024-05-30
申请号：US18522985
申请日：2023-11-29
申请人： CHEMTREAT, INC.
发明人： Alfonso SALINAS
IPC分类号： C02F11/147
CPC分类号： C02F11/147 , C02F2103/34 , C02F2305/04
摘要： Methods are described for treating fly ash sludge that includes calcium sulfate and/or calcium sulfite to selectively capture fly ash. The methods include treating the slurry with a first flocculant that selectively captures fly ash in the slurry relative to the calcium sulfate and/or calcium sulfite in the slurry, or alternatively selectively captures the calcium sulfate and/or calcium sulfite in the slurry relative to the fly ash, and clarifying the treated slurry to provide (i) a stream that includes relatively higher amounts of the calcium sulfate and/or calcium sulfate as compared to the slurry, and (ii) a stream that includes relatively higher amounts of the fly ash as compared to the slurry. Further processing of the stream that is enriched in fly ash can provide a high-purity fly ash product.

42. 发明公开

US20230391652A1 SLUDGE TREATMENT AND DEWATERING SYSTEMS 审中-公开
公开(公告)号：US20230391652A1
公开(公告)日：2023-12-07
申请号：US18032696
申请日：2021-10-20
申请人： Biovac Solutions Inc.
发明人： Terry SULPHUR
IPC分类号： C02F11/147
CPC分类号： C02F11/147 , C02F2201/005
摘要： An apparatus for dewatering sludge comprising: a tank having an internal space divided by a dividing wall into an intake chamber and an extract chamber; an intake pipe connected to the intake chamber and comprising an intake valve for selectively opening and closing the intake pipe; a discharge pipe connected to the extract chamber and comprising a discharge valve for selectively opening and closing the discharge pipe; a transfer pipe providing fluid communication between a bottom portion of the intake chamber and a top portion of the extract chamber, the transfer pipe extending upwardly out of the tank from the intake chamber and downwardly into the tank into the extract chamber and comprising a transfer valve external to the tank for selectively opening and closing the transfer pipe; a pump for selectively creating positive and negative pressure within the intake chamber; and, a screen within the extract chamber positioned between the second opening of the transfer pipe and the discharge pipe.

43. 发明公开

US20230373838A1 METHODS AND SYSTEMS OF DEWATERING TAILINGS 审中-公开
公开(公告)号：US20230373838A1
公开(公告)日：2023-11-23
申请号：US18044338
申请日：2021-09-07
申请人： Somerset International Finance Designated Activity Company
发明人： David Osborne , James Graham , Geoff Orr , James C. Fisher, II
IPC分类号： C02F11/127 , C02F11/147
CPC分类号： C02F11/127 , C02F11/147 , C02F2103/10
摘要： Methods of dewatering tailings, including tailings streams that may include a clay, ultra-fine particles, or both. The methods may include providing a tailings stream, dewatering the tailings stream with a dewatering apparatus to produce a first cake and a first residual effluent stream, contacting the first residual effluent stream with one or more additives, and dewatering the first residual effluent stream with a solid bowl centrifuge to produce a second cake and a second residual effluent stream. The methods may include providing a tailings stream, contacting the tailings stream with one or more additives, and dewatering the tailings stream with a solid bowl centrifuge to produce a first cake and a first residual effluent stream.

44. 发明授权

US11708287B2 Method for treatment of oil-based sludge using thermal desorption 有权
公开(公告)号：US11708287B2
公开(公告)日：2023-07-25
申请号：US17125385
申请日：2020-12-17
申请人： TECECOR S.A.S
发明人： William Ariza Fontecha
IPC分类号： C02F11/13 , C10G1/04 , C02F11/147 , C02F103/36
CPC分类号： C02F11/13 , C02F11/147 , C10G1/045 , C02F2103/365 , C10G2300/1003
摘要： A method for the treatment of oil-based sludge by thermal desorption, characterized in that it comprises a step of conditioning of the sludge to be treated which includes the conditioning of the oil-based sludge with rice husk in a 1:2 ratio, before entering the TDU, increasing the technical and economic viability and cost relation of the thermal desorption for oil-based sludge treatment, showing better performance, and making possible the treatment of sludge on an industrial scale with effective rates of 28.6 m3/day, oil recovery of 54%, with a volumetric increase of 19%, compared to the original volume, and a fuel consumption adjusted to the historical data of the TDU from the economic point of view, which allows to have a high amount of rice husk, reducing the costs associated with the elimination of this agro-industrial waste.

45. 发明授权

US11560323B2 Compositions of dry acid polymers and uses thereof 有权
公开(公告)号：US11560323B2
公开(公告)日：2023-01-24
申请号：US17230494
申请日：2021-04-14
申请人： KEMIRA OYJ
发明人： Duane C. Wilson , Thomas Fenderson , Igal Maasen , Sukhjit Aujla
IPC分类号： C02F1/56 , C02F11/147 , C02F11/14 , C08F220/56 , C08L33/26 , C02F103/10
摘要： The present embodiments generally relate to the use of one or more polymers, e.g., one or more dry acid polymers and/or one or more dry acid polymers with salt, as flocculants, generally for treating tailings, e.g., oil sands tailings, in need of solid-liquid separation, e.g., in order to efficiently recycle water and/or to reduce the volume of tailings which may be transferred to a tailings pond and/or a dedicated disposal area.

46. 发明授权

US11535587B2 Hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid 有权
公开(公告)号：US11535587B2
公开(公告)日：2022-12-27
申请号：US17664208
申请日：2022-05-19
申请人： SPCM SA
发明人： Cédrick Favero , Johann Kieffer
IPC分类号： C07C309/15 , C08F20/58 , C02F11/147 , C09K8/68 , C09K8/80 , E21B43/26 , C09K8/588 , E21B43/16 , C02F1/56 , C02F103/10
摘要： The present invention relates to a hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid having a 2-theta powder X-ray diffraction diagram comprising peaks at 10.58°, 11.2°, 12.65°, 13.66°, 16.28°, 18.45°, 20°, 20.4°, 22.5°, 25.5°, 25.88°, 26.47°, 28.52°, 30.28°, 30.8°, 34.09°, 38.19°, 40.69°, 41.82°, 43.74°, 46.04° degrees (+/−0.1°).
The present invention also relates to a production method for this form of 2-acrylamido-2-methylpropane sulfonic acid and a preparation method for an aqueous solution A of a salt of this form of 2-acrylamido-2-methylpropane sulfonic acid, and the (co)polymer of this form of -acrylamido-2-methylpropane sulfonic acid.

47. 发明申请

US20220332642A1 METHOD OF INERTING EXCAVATION SLUDGE 有权
公开(公告)号：US20220332642A1
公开(公告)日：2022-10-20
申请号：US17722557
申请日：2022-04-18
申请人： EIFFAGE GC INFRA LINEAIRES
发明人： Laurence BOULANGÉ , Florian DOOM , Marina DA CRUZ GOMES
IPC分类号： C04B18/12 , C04B26/26 , C02F11/147 , B01D11/04
摘要： A process for rendering excavation material inert for the purpose of their analysis, of their storage and/or of their valorisation. The process for inerting the excavation material includes adding an organic acid, of a complexing agent or of a diaminotetracarboxylic acid to the excavation material, the complexing agent being chosen from a sugar alcohol, a cationic surface-active agent and their mixtures. Also, a method of determining the concentration by weight of a polluting inorganic element included in an excavated material, a method of storage of the inert excavation material, and a method of valorising the inerted material.

48. 发明申请

US20220315500A1 Double Drum Systems and Processes for Converting Biosolids to Fertilizer 有权
公开(公告)号：US20220315500A1
公开(公告)日：2022-10-06
申请号：US17220994
申请日：2021-04-02
申请人： Merrell Bros, Inc.
发明人： Terry Merrell
IPC分类号： C05F3/04 , C02F11/127 , C02F11/13 , C02F11/147 , C02F11/123
摘要： A system for converting biosolids to fertilizer comprising: a storage tank for holding biosolids; a conveyor operably connected to the storage tank for conveying the biosolids from the storage tank to a pressurized screener, wherein the pressurized screener selectively eliminates unwanted debris from the biosolids; a second conveyor operably connected to the pressurized screener to convey the biosolids to a centrifuge, the centrifuge operatively configured to remove water from the biosolids; a third conveyor operably connected to the centrifuge to convey the biosolids to a feeding chamber, a self-leveling conveyer position in the feeding chamber configured to deliver the biosolids to a nip feeder operatively positioned in the feeding chamber to selectively biosolids from the feeding chamber to a nip, wherein the nip is a gap between a first and second dryer drums; the first and second dryer drums operatively positioned to rotate and draw biosolids from the nip feeder into the nip, wherein a first and second scrapers are operably positioned to remove biosolids from the first and second dryer drums as they rotate, wherein the first and second dryer drums are selectively heated with steam provided by a boiler; a fourth conveyor positioned underneath the dryer drums to collect the biosolids after they pass through the nip and to convey the biosolids to a pelletizer configured to form the biosolids into pellets; a fifth conveyor operably connected to the pelletizer to convey the pellets to a cooling chamber.

49. 发明申请

US20210371316A1 PROCESS FOR DEWATERING AN AQUEOUS PROCESS STREAM 有权
公开(公告)号：US20210371316A1
公开(公告)日：2021-12-02
申请号：US16319062
申请日：2017-09-14
申请人： Dow Global Technologies LLC
发明人： Paul A. Gillis , Jason S. Moore , Michael K. Poindexter , Jason A. Tubbs
IPC分类号： C02F11/147 , B01D21/01 , B01D21/26 , C02F11/127 , C02F11/16
摘要： The present invention relates to an in-line blending apparatus and use therein for flocculating and dewatering an aqueous mineral suspension. Said method comprises blending an aqueous mineral suspension and a poly(ethylene oxide) (co)polymer using a progressive cavity pump. Said method is particularly useful for the treatment of suspensions of particulate material, especially waste mineral slurries, especially for the treatment of tailings and other waste material resulting from mineral processing, in particular, the processing of oil sands tailings.

50. 发明授权

US11174185B2 Methods and systems for multi-stage encapsulation of wastes and production thereof into aggregate products 有权
公开(公告)号：US11174185B2
公开(公告)日：2021-11-16
申请号：US17054480
申请日：2019-05-10
申请人： Ash Management Engineering, Inc.
发明人： Alan E. Bland
IPC分类号： C04B18/02 , C04B18/04 , C04B28/04 , C04B20/12 , C02F11/00 , C04B20/10 , C04B111/60 , C02F103/10 , C04B111/00 , C04B111/52 , C02F11/122 , C02F11/147
摘要： Embodiments of the present invention may provide encapsulation of waste (2) materials in a first (1), double (5), triple (7), or even quadruple (44) encapsulation. Encapsulation may include waste (2), ash (4), Portland cement (3), water, chemicals, or the like. Agglomerates formed perhaps with high energy mixing may be processed, cured, or the like.

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