A system and method for generating water concentrated in calcium bromide from produced water, to provide for drilling fluid having the calcium bromide. The technique includes flowing the produced water through a bed of ion-exchange resin to sorb bromide ions from the produced water onto the ion-exchange resin, and then regenerating the ion-exchange resin to desorb the bromide ions for combination with calcium ions to acquire an aqueous solution with calcium and bromide.

The present invention relates to methods of regenerating ion exchange resins in systems using anhydrous organic solvents, such as systems for alkaliating or lithiating materials, such as anodes, in gamma-butyrolactone.

The present invention relates to methods of regenerating ion exchange resins in systems using anhydrous organic solvents, such as systems for alkaliating or lithiating materials, such as anodes, in gamma-butyrolactone.

The invention relates to a purification method, comprising the following steps: —supplying a stream (6) comprising a non-ionised species, monovalent cations and divalent cations; bringing the stream (6) into contact with a first cation exchange resin (1) in sodium and/or potassium form; —collecting a first fraction (7) which contains the non-ionised species and is enriched in monovalent cations and depleted of divalent cations with respect to the stream (6); —bringing the first fraction (7) into contact with a second cation exchange resin (2) in hydronium form; —collecting a second fraction (8) which contains the non-ionised species and is depleted of monovalent cations with respect to the first fraction (7); —regenerating the second cation exchange resin (2) with a sulphuric acid solution (10); —collecting a first regeneration effluent comprising at least one fraction A, the fraction A comprising sodium and/or potassium ions; and —recycling the fraction A to regenerate the first cation exchange resin (1).

The invention relates to a purification method, comprising the following steps: —supplying a stream (6) comprising a non-ionised species, monovalent cations and divalent cations; bringing the stream (6) into contact with a first cation exchange resin (1) in sodium and/or potassium form; —collecting a first fraction (7) which contains the non-ionised species and is enriched in monovalent cations and depleted of divalent cations with respect to the stream (6); —bringing the first fraction (7) into contact with a second cation exchange resin (2) in hydronium form; —collecting a second fraction (8) which contains the non-ionised species and is depleted of monovalent cations with respect to the first fraction (7); —regenerating the second cation exchange resin (2) with a sulphuric acid solution (10); —collecting a first regeneration effluent comprising at least one fraction A, the fraction A comprising sodium and/or potassium ions; and —recycling the fraction A to regenerate the first cation exchange resin (1).

A dual-membrane on-line generator for an acid or alkali solution is provided, including an upper electrolytic cell body (3), a middle electrolytic cell body (4) and a lower electrolytic cell body (5) which are clamped by an upper fastening steel plate (1) and a lower fastening steel plate (2), an upper regeneration liquid channel (A), a middle eluent channel (B) and a lower regeneration liquid channel (C) being provided on the middle electrolytic cell body (4).

A dual-membrane on-line generator for an acid or alkali solution is provided, including an upper electrolytic cell body (3), a middle electrolytic cell body (4) and a lower electrolytic cell body (5) which are clamped by an upper fastening steel plate (1) and a lower fastening steel plate (2), an upper regeneration liquid channel (A), a middle eluent channel (B) and a lower regeneration liquid channel (C) being provided on the middle electrolytic cell body (4).

A method for removing impurities from a taurine mother liquor and recovering the taurine mother liquor. The method is used in an ethylene oxide production process for taurine. The last mother liquor of taurine is ion-exchanged through an anion exchange resin; then the anion exchange resin is eluted and regenerated with alkaline solution, and the eluate is collected. The eluate is subjected to ammonia mixing treatment, and the treated mother liquor is generated after the impunity is removed from the eluate by solid-liquid separation. The treated mother liquor can then be returned to the ammonolysis step of taurine production.

A system and method configured to restore ion exchange kinetic properties and purify resin is described. Degraded ion exchange kinetic properties of anion resin will eventually result in impurity slippage through resin charges. This system and method employs an acid catalyst in combination with sulfite cleaning solution to remove organic material and to protonate iron oxides for deconstruction and removal from anion resins. The cleaning solution, when applied via a cleaning vessel utilizing an eductor(s)/plenum and wedge-wire screen draw chamber, while controlling all phases of cleaning by electronic monitoring, yields complete restoration of ion exchange kinetics on usable resin. As such, the system and method provides a safe, effective, and vastly improved method for restoring anion resin kinetics and improving regeneration quality, for improved resin performance and minimizing resin replacement costs.

A system and method configured to restore ion exchange kinetic properties and purify resin is described. Degraded ion exchange kinetic properties of anion resin will eventually result in impurity slippage through resin charges. This system and method employs an acid catalyst in combination with sulfite cleaning solution to remove organic material and to protonate iron oxides for deconstruction and removal from anion resins. The cleaning solution, when applied via a cleaning vessel utilizing an eductor(s)/plenum and wedge-wire screen draw chamber, while controlling all phases of cleaning by electronic monitoring, yields complete restoration of ion exchange kinetics on usable resin. As such, the system and method provides a safe, effective, and vastly improved method for restoring anion resin kinetics and improving regeneration quality, for improved resin performance and minimizing resin replacement costs.