Disclosed is a method for treating water, including the extraction of at least two ionic species, the ionic species including an anionic species and a cationic species and being present in the water to be treated, the method especially including a step of mixing a liquid hydrophobic organic phase and the water to be treated, the water to be treated being in the liquid state, in order to subsequently obtain liquid treated water and a hydrophobic liquid organic phase loaded with the ionic species, and a step of thermal regeneration of the organic phase loaded with chemical species. Also disclosed are compounds and compositions that can be used in the method.

The invention relates to an anti-blocking seawater desalination device based on graphene filtering, comprising heating device, solar heat-collecting device, fresh water condensation heat-exchange device and thermal-expansion and cold-shrinkage control valve mechanism; the heating device can fully heat and distill seawater, the sprayed seawater is distilled by graphene heat-conduction layers to improve the distillation efficiency and avoiding blocking; the distilled water vapor enters into fresh water condensation heat-exchange device to exchange heat with seawater, increasing the seawater temperature, making full use of the heat in water vapor, and increasing water vapor condensation speed; the distilled concentrated seawater enters into the thermal-expansion and cold-shrinkage control valve mechanism, the flow of seawater entering into the heating device is controlled by the concentrated seawater temperature, when the temperature is too high, the flow of the seawater entering into the heating device increases, and when the temperature is too low, the flow decreases.

According to some embodiments, a system for desalination of a liquid comprises at least one primary treatment process, at least one secondary treatment process, wherein the at least one secondary treatment process comprises at least one reactor, and at least one tertiary treatment process, wherein the at least one primary treatment process is configured to adjust a pH of the liquid to target pH level and to add at least one chemical additive to the liquid, wherein the at least one reactor is configured to heat the liquid to a temperature of at least 350° F. and to supply a pressure to the liquid to maintain the liquid in a liquid state, and wherein the dissolved salt of the liquid is configured to react with at least a portion of the at least one chemical additive to form an insoluble product within the at least one reactor.

The present invention relates to a salt recovery solution and to a process for separating a salt from an aqueous solution. The present disclosure also relates to a salt recovery solution and to its use to concentrate a salt or brine solution by recovering water therefrom. The salt recovery solution comprising at least two or more components independently selected from any combination of integers a), b), c) and d): where a) is a straight, branched or optionally substituted cyclic C.sub.4-C.sub.9 ether containing compound; b) is a straight chain or branched C.sub.3-C.sub.9 alkyl substituted by —OH; c) is a straight chain, branched or cyclic C.sub.4-C.sub.9 ketone or C.sub.4-C.sub.9 diketone; and d) is a straight chain or branched C.sub.3-C.sub.9 ester containing compound.

A seawater mineral extract derived from seawater having a salinity of from 3.4% Brix to 3.6% Brix, wherein the seawater mineral extract comprises a mineral salt content of at least 20% of the overall seawater extract.

A solar-powered distillation process converts saline water into potable water and useful solid residues. A solid material is heated by solar energy, and the solid material is brought into direct contact with saline water. Some of the water becomes steam and vapor, which can be condensed to produce potable water. The water-soluble salts within the saline water are precipitated separately, and collected for commercial use. Scale formed on the solid material can be removed, and the solid material reheated by solar energy, and the reheated solid material can again be used to heat incoming saline water in a continuous process.

A method includes: (1) using a chelating agent, extracting divalent ions from a brine solution as complexes of the chelating agent and the divalent ions; (2) using a weak acid, regenerating the chelating agent and producing a divalent ion salt solution; and (3) introducing carbon dioxide to the divalent ion salt solution to induce precipitation of the divalent ions as a carbonate salt. Another method includes: (1) combining water with carbon dioxide to produce a carbon dioxide solution; (2) introducing an ion exchanger to the carbon dioxide solution to induce exchange of alkali metal cations included in the ion exchanger with protons included in the carbon dioxide solution and to produce a bicarbonate salt solution of the alkali metal cations; and (3) introducing a brine solution to the bicarbonate salt solution to induce precipitation of divalent ions from the brine solution as a carbonate salt.

According to some embodiments, a system for desalination of a liquid comprises at least one primary treatment process, at least one secondary treatment process, wherein the at least one secondary treatment process comprises at least one reactor, and at least one tertiary treatment process, wherein the at least one primary treatment process is configured to adjust a pH of the liquid to target pH level and to add at least one chemical additive to the liquid, wherein the at least one reactor is configured to heat the liquid to a temperature of at least 350° F. and to supply a pressure to the liquid to maintain the liquid in a liquid state, and wherein the dissolved salt of the liquid is configured to react with at least a portion of the at least one chemical additive to form an insoluble product within the at least one reactor.

Provided is a desalination device using a solvent extraction method, comprising: a first mixing tank composed of a feed water inlet into which feed water comprising salt ions and water molecules flows, a first solvent inlet into which a first solvent selectively reacting more with the water molecules than with the salt ions flows, a first mixing tank body in which the feed water and the first solvent are mixed so as to form a mixed water, and a mixed water outlet through which the mixed water is discharged; a first separation tank composed of a mixed water inlet which communicates with the mixed water outlet so that the mixed water flows therein, a first separation tank body in which brine containing salt ions of the feed water and first treatment water formed from mixing the water molecules of the feed water and the first solvent of the mixed water are separated by layer, and a first treatment water outlet through which the first treatment water is discharged; a second mixing tank composed of a first treatment water inlet which communicates with the first treatment water outlet so that the first treatment water flows therein, a second solvent inlet into which a second solvent selectively reacting more with the first solvent than with the water molecules of the treatment water flows, a second mixing tank body in which the first treatment water and the second solvent are mixed so as to form second treatment water, and a second treatment water outlet through which the second treatment water is discharged; and a second separation tank composed of a second treatment water inlet which communicates with the second treatment water outlet so that the second treatment water flows therein, a second separation tank body in which the water molecules of the first treatment water and a composite solvent formed from mixing the first solvent of the first treatment water and the second solvent of the second treatment water are separated by layer, and a fresh water outlet through which fresh water composed of the water molecules is discharged.

The invention relates to an anti-blocking seawater desalination device based on graphene filtering, comprising heating device, solar heat-collecting device, fresh water condensation heat-exchange device and thermal-expansion and cold-shrinkage control valve mechanism; the heating device can fully heat and distill seawater, the sprayed seawater is distilled by graphene heat-conduction layers to improve the distillation efficiency and avoiding blocking; the distilled water vapor enters into fresh water condensation heat-exchange device to exchange heat with seawater, increasing the seawater temperature, making full use of the heat in water vapor, and increasing water vapor condensation speed; the distilled concentrated seawater enters into the thermal-expansion and cold-shrinkage control valve mechanism, the flow of seawater entering into the heating device is controlled by the concentrated seawater temperature, when the temperature is too high, the flow of the seawater entering into the heating device increases, and when the temperature is too low, the flow decreases.