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公开(公告)号：US10941046B2
公开(公告)日：2021-03-09
申请号：US16333255
申请日：2017-09-13
发明人： Bernard Roy Mack , Kashi Banerjee
摘要： The present invention relates to a process for producing sodium bicarbonate crystals. Sodium carbonate derived from TRONA ore is mixed with a treated mother liquor produced in a downstream process to form a sodium carbonate solution. The sodium carbonate solution is subjected to a crystallization process that produces sodium bicarbonate crystals. The sodium bicarbonate crystals are separated from the sodium carbonate solution to form a mother liquor that includes silica. To remove the silica in the mother liquor, the mother liquor is directed to a reactor where an aluminum salt is mixed with the mother liquor to precipitate hydrous aluminum oxide which adsorbs silica thereon. The hydrous aluminum oxide with adsorbed silica is removed from the mother liquor. This produces the treated mother liquor that is mixed with the sodium carbonate and which forms the sodium carbonate solutions.
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公开(公告)号：US20220144655A1
公开(公告)日：2022-05-12
申请号：US17438495
申请日：2020-03-09
发明人： Bernard Roy Mack
摘要： A method is disclosed for concentrating and purifying an eluate brine and producing a purified lithium compound. An extraction eluate, rich in lithium, is directed to a nanofiltration unit or a softening process that removes sulfate and/or calcium and magnesium. Permeate from the nanofiltration unit or the effluent from the softening process is directed through an electrodialysis unit. As the lithium-rich solution moves through the electrodialysis unit, lithium, sodium and chloride ions pass from the solution through a cation-transfer membrane and an anion-transfer membrane to concentrate compartments. A dilute stream is directed through the concentrate compartments and collects the lithium, sodium and chloride ions. The electrodialysis unit also produces a product stream which contains non-ionized impurities, such as silica and/or boron. Concentrate from the electrodialysis unit is subject to a precipitation process that produces a lithium compound that is subsequently subjected to a purification process.
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公开(公告)号：US20190241439A1
公开(公告)日：2019-08-08
申请号：US16333255
申请日：2017-09-13
发明人： Bernard Roy Mack , Kashi Banerjee
CPC分类号： C01D7/10 , B01D9/0059 , B01D45/12 , B01D71/02 , B01D2251/60 , B01D2253/104 , C01D7/24 , C01F7/02
摘要： The present invention relates to a process for producing sodium bicarbonate crystals. Sodium carbonate derived from TRONA ore is mixed with a treated mother liquor produced in a downstream process to form a sodium carbonate solution. The sodium carbonate solution is subjected to a crystallization process that produces sodium bicarbonate crystals. The sodium bicarbonate crystals are separated from the sodium carbonate solution to form a mother liquor that includes silica. To remove the silica in the mother liquor, the mother liquor is directed to a reactor where an aluminum salt is mixed with the mother liquor to precipitate hydrous aluminum oxide which adsorbs silica thereon. The hydrous aluminum oxide with adsorbed silica is removed from the mother liquor. This produces the treated mother liquor that is mixed with the sodium carbonate and which forms the sodium carbonate solutions.
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公开(公告)号：US12005400B2
公开(公告)日：2024-06-11
申请号：US17271237
申请日：2019-08-13
发明人： Bernard Roy Mack , Kevin Rollings
CPC分类号： B01D65/08 , B01D61/025 , B01D61/06 , B01D61/08 , B01D61/10 , B01D61/12 , C02F1/441 , B01D2311/08 , B01D2311/2512 , B01D2311/2523 , B01D2313/083 , B01D2313/18 , B01D2313/243 , B01D2313/246 , B01D2313/30 , B01D2313/501 , C02F2301/08 , C02F2303/22
摘要： A high recovery variable volume reverse osmosis system where the volume of concentrate cycled through the RO system is reduced in response to recovery levels increasing. By reducing the volume of concentrate cycled through the RO system, this reduces the cycle time of highly saturated concentrate passing through the RO system. Reducing the cycle time of concentrate passing through the RO system tends to minimize or reduce membrane scaling.
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