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公开(公告)号：US10766782B2
公开(公告)日：2020-09-08
申请号：US15761896
申请日：2016-09-22
Applicant: Solvay SA
Inventor： James C. Kisielewski , David M. Hansen , Keith O. Hayes , Mayra Muci-Castaneda , Alain Vandendoren
Abstract: A process for producing crystalline sodium bicarbonate, comprising: providing an aqueous sodium-bicarbonate containing liquor originating from a reactive crystallization step in which first sodium bicarbonate crystals are produced and recovered; feeding at least a portion of said aqueous sodium-bicarbonate containing liquor to a cooling crystallization unit to form second sodium bicarbonate crystals and produce a crystals slurry comprising the second sodium bicarbonate crystals; and withdrawing a portion of the crystals slurry from the cooling crystallization unit for the withdrawn second sodium bicarbonate crystals to be further processed. A portion of the second sodium bicarbonate crystals withdrawn from the cooling crystallization unit may be fed to a sodium bicarbonate reactive crystallization unit, to a caustic unit, or may be separated and dried. The reactive crystallization, separation and/or drying units where the second sodium bicarbonate crystals are further processed may be the same units where the first sodium bicarbonate crystals are processed.
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公开(公告)号：US09638017B2
公开(公告)日：2017-05-02
申请号：US14062877
申请日：2013-10-24
Applicant: SOLVAY SA
Inventor： Jean-Paul Detournay , Ronald O. Hughes , Herve Cuche , Matteo Paperini , Joseph A. Vendetti , Larry C. Refsdal , David M. Hansen , Todd Brichacek , Justin T. Patterson , John Kolesar , Ryan Schmidt , Beatrice C. Ortego
IPC: E21B43/28
CPC classification number: E21B43/28 , E21B43/283
Abstract: Batch initiation and/or exploitation phases of in situ solution mining of a mineral from an underground evaporite mineral stratum. The initiation phase may comprise a lifting step which employs a lithological displacement (lifting) of this stratum from an underlying non-evaporite stratum with application at the strata interface of a lifting hydraulic pressure greater than overburden pressure by a solvent suitable to dissolve the mineral; a soaking step for dissolution of mineral upon contact with stationary solvent, and a brine extraction step. The method may further comprise one or more exploitation phases carried out after the initiation phase. The exploitation phase may comprise a partial filing or filling step with the same solvent or different solvent than during lifting, another soaking step, and another brine extraction step. The lifting, cavity partial filing/filling, and brine extraction steps are being discontinuous. The evaporite mineral stratum preferably comprises trona.
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公开(公告)号：US10508528B2
公开(公告)日：2019-12-17
申请号：US15880581
申请日：2018-01-26
Applicant: SOLVAY SA
Inventor： Ronald O. Hughes , Matteo Paperini , Herve Cuche , Joseph A. Vendetti , Larry C. Refsdal , Jean-Paul Detournay , David M. Hansen , Todd Brichacek , Justin T. Patterson , John Kolesar , Ryan Schmidt , Beatrice C. Ortego
Abstract: A method for in situ solution mining of a mineral from an underground evaporite stratum using a set of wells in fluid communication with at least one mineral cavity with some wells operated in solvent injection mode and other wells operated in brine production mode and optionally with some inactive wells, comprising switching the operation mode of one or more wells. The evaporite mineral preferably comprises trona. The at least one cavity may be formed by directionally drilled uncased boreholes or by lithological displacement of the evaporite stratum at a weak interface with an underlying insoluble stratum by application of a lifting hydraulic pressure to create an interfacial gap. The extracted brine can be processed to make valuable products such as soda ash and/or any derivatives thereof. This method can provide more uniform dissolution of mineral in the cavity, minimize flow channeling, minimize sodium bicarbonate blinding for solution mining of incongruent trona ore, and/or may avoid uneven deposit of insolubles.
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公开(公告)号：US09879516B2
公开(公告)日：2018-01-30
申请号：US14657448
申请日：2015-03-13
Applicant: SOLVAY SA
Inventor： Ronald O. Hughes , Matteo Paperini , Herve Cuche , Joseph A. Vendetti , Larry C. Refsdal , Jean-Paul Detournay , David M. Hansen , Todd Brichacek , Justin T. Patterson , John Kolesar , Ryan Schmidt , Beatrice C. Ortego
CPC classification number: E21B43/28 , C22B3/46 , C22B26/10 , E21B43/283 , E21B43/30 , E21B43/305
Abstract: A method for in situ solution mining of a mineral from an underground evaporite stratum using a set of wells in fluid communication with at least one mineral cavity with some wells operated in solvent injection mode and other wells operated in brine production mode and optionally with some inactive wells, comprising switching the operation mode of one or more wells. The evaporite mineral preferably comprises trona. The at least one cavity may be formed by directionally drilled uncased boreholes or by lithological displacement of the evaporite stratum at a weak interface with an underlying insoluble stratum by application of a lifting hydraulic pressure to create an interfacial gap. The extracted brine can be processed to make valuable products such as soda ash and/or any derivatives thereof. This method can provide more uniform dissolution of mineral in the cavity, minimize flow channeling, minimize sodium bicarbonate blinding for solution mining of incongruent trona ore, and/or may avoid uneven deposit of insolubles.
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