A method and system for independently sequestering liquid calcium chloride and pure solid sodium chloride from a solid salt waste mixture including calcium chloride, sodium chloride and impurities. In practice, the method includes a calcium chloride sequestration step, wherein the waste mixture is combined with water, maintaining the calcium chloride within the mixture at least 30% w/w, and the resulting liquid calcium chloride is decanted from such mixture. The remaining salt particulates may be depured by a depuration process, which may include the recycling of salt brine through the depuration process. Particulate impurities in the solid salt waste mixture may also be removed in practice of the methods of the disclosed technology, by means of one or more clarifiers.

A side stream subsystem can be used to remove impurity species from the recirculating alkali metal chloride solution in certain electrolysis systems. Silicon and/or aluminum species can be removed via precipitation after introducing an alkali metal hydroxide and magnesium chloride in a side stream line in the subsystem. The invention can allow for a substantial reduction in raw material and capital costs.

A side stream subsystem can be used to remove impurity species from the recirculating alkali metal chloride solution in certain electrolysis systems. Silicon and/or aluminum species can be removed via precipitation after introducing an alkali metal hydroxide and magnesium chloride in a side stream line in the subsystem. The invention can allow for a substantial reduction in raw material and capital costs.

A method includes treating a first brine stream including a plurality of minerals with an anti-scalant to produce a treated brine. The first brine stream is provided by a wastewater treatment system. The method also includes directing the treated brine to a first nanofiltration (NF) system disposed downstream from and fluidly coupled to the wastewater treatment system, generating a first NF permeate stream and a first NF non-permeate stream from the treated brine in the first NF system, directing the first NF non-permeate stream to a mineral removal system disposed downstream from and fluidly coupled to the first NF system, and removing the plurality of minerals from the first NF non-permeate stream to generate a first overflow stream in the mineral removal system. The first overflow stream comprises at least a portion of the plurality of minerals. The method also includes routing a first portion of the first overflow stream to a hydrochloric acid (HCl) and sodium hydroxide (NaOH) production system disposed downstream from and fluidly coupled to the mineral removal system. The HCl and NaOH production system includes a second NF system that may receive the first portion of the first overflow stream and may generate a second brine stream from the first portion of the first overflow stream. The method further includes directing the second brine stream to a first electrodialysis (ED) system disposed within the HCl and NaOH production system and fluidly coupled to the second NF system. The first ED system may generate HCl and NaOH from the second brine stream.

A method includes treating a first brine stream including a plurality of minerals with an anti-scalant to produce a treated brine. The first brine stream is provided by a wastewater treatment system. The method also includes directing the treated brine to a first nanofiltration (NF) system disposed downstream from and fluidly coupled to the wastewater treatment system, generating a first NF permeate stream and a first NF non-permeate stream from the treated brine in the first NF system, directing the first NF non-permeate stream to a mineral removal system disposed downstream from and fluidly coupled to the first NF system, and removing the plurality of minerals from the first NF non-permeate stream to generate a first overflow stream in the mineral removal system. The first overflow stream comprises at least a portion of the plurality of minerals. The method also includes routing a first portion of the first overflow stream to a hydrochloric acid (HCl) and sodium hydroxide (NaOH) production system disposed downstream from and fluidly coupled to the mineral removal system. The HCl and NaOH production system includes a second NF system that may receive the first portion of the first overflow stream and may generate a second brine stream from the first portion of the first overflow stream. The method further includes directing the second brine stream to a first electrodialysis (ED) system disposed within the HCl and NaOH production system and fluidly coupled to the second NF system. The first ED system may generate HCl and NaOH from the second brine stream.

The present invention relates to sylvinite ore processing in the extraction industry and provides a resource-efficient method of separating potassium chloride and sodium chloride from polymineral sources comprising potassium chloride and sodium chloride and a vertical three-zone reactor for separating potassium chloride and sodium chloride from polymineral sources comprising potassium chloride and sodium chloride.

The present invention relates to sylvinite ore processing in the extraction industry and provides a resource-efficient method of separating potassium chloride and sodium chloride from polymineral sources comprising potassium chloride and sodium chloride and a vertical three-zone reactor for separating potassium chloride and sodium chloride from polymineral sources comprising potassium chloride and sodium chloride.

A process for the extraction of lithium from a brine, wherein a solution of the brine is contacted with a titanate adsorbent such that lithium ions are adsorbed thereon whilst rejecting substantially all other cations. The adsorbent is provided in the form of either a hydrated titanium dioxide or a sodium titanate. The process in turn produces a substantially pure lithium chloride solution

A side stream subsystem can be used to remove impurity species from the recirculating alkali metal chloride solution in certain electrolysis systems. Silicon and/or aluminum species can be removed via precipitation after introducing an alkali metal hydroxide and magnesium chloride in a side stream line in the subsystem. The invention can allow for a substantial reduction in raw material and capital costs.

A side stream subsystem can be used to remove impurity species from the recirculating alkali metal chloride solution in certain electrolysis systems. Silicon and/or aluminum species can be removed via precipitation after introducing an alkali metal hydroxide and magnesium chloride in a side stream line in the subsystem. The invention can allow for a substantial reduction in raw material and capital costs.