Abstract:
The invention relates to a process for preparing a crystalline solid material of formula LiCl.2Al(OH) 3 .nH 2 O with n being between 0.01 and 10, said process comprising at least the following steps: a) a step of mixing, in an aqueous medium, at least one source of alumina and at least one source of lithium in order to obtain a suspension, b) a step of filtering the suspension obtained in step a) in order to obtain a paste, c) a step of drying the paste obtained at the end of step b), d) a step of shaping said dried paste, directly after the drying step c) in order to obtain a shaped solid material, said shaping step d) being carried out in the absence of binder, and e) the drying of the shaped solid material obtained, f) a step of hydrothermal treatment in order to obtain the shaped crystalline solid material of formula LiCl.2Al(OH) 3 .nH 2 O. The invention also relates to a solid material obtained according to this process and to a process for extracting lithium from saline solutions using the material thus prepared.
Abstract:
The invention concerns a particle for recovering an anion from an aqueous solution comprising a magnetic material associated with a silica based layer forming a magnetic microparticle with a silica based surface, and a layered double hydroxide deposited on the surface of the microparticle. The invention further concerns a method for manufacturing a magnetic particle comprising mixing a magnetic microparticle with a silica based surface in an aqueous solution at about pH 7 with a dispersion of layered double hydroxide at about pH 7 to obtain a mixture, and ultrasonicating the mixture for depositing the layered double hydroxide on the surface of the microparticle. In addition, the invention concerns various uses of the particle.
Abstract:
A hydrotalcite-like granular material having a grain size of 0.24 mm or larger is produced by drying a material that contains at least a hydrotalcite-like substance and that has a water content of 70% or lower at equal to or lower than a temperature at which the hydrotalcite-like substance is dehydrated of crystal water contained therein, preferably at 90°C or higher and 110°C or lower, such that the resulting hydrotalcite-like granular material has a water content of 10% or higher. In this manner, a hydrotalcite-like granular material that has a stable morphology and a high anion exchange performance and that can be produced at a low cost can be produced.
Abstract:
The invention provides a microporous material which comprises a positively charged framework and has potential application as an anion exchange material, typically in the treatment of waste materials in effluent streams, for example in the nuclear power industry. The microporous material facilitates the removal of undesirable anion species from solutions. A preferred structure comprises a silicophosphate comprising tetrahedra of P04+ and Si04, and the invention also provides a method for the synthesis of a silicophosphate using a two-phase system which includes an organic phase comprising an organosilicon compound and an aqueous phase comprising a phosphoric acid.
Abstract:
Adsorbents for high mobility group proteins (HMG proteins) whereby HMG proteins in a body fluid can be eliminated. These adsorbents are composed of a water-insoluble support on which a substance having a functional group capable of forming a hydrogen bond and/or a hydrophobic functional group is immobilized.
Abstract:
An ion-exchanger is provided which comprises zirconium hydroxide supported on active carbon. A process for producing the ion-exchanger, and a process for removing a multiply charged anion by using the ion-exchanger are also provided. The ion-exchanger of the present invention has high chemical resistance, high heat resistance, high mechanical strength, and excellent ion exchange characteristics.
Abstract:
A water-insoluble pigment which comprises a complex of (1) an anion exchange material with a layered crystal structure and (2) a water-soluble dye is disclosed.
Abstract:
A water-insoluble pigment comprising a complex of (1) a water-insoluble inorganic anion exchange material with a layered structure and (2) a water-soluble dye is disclosed.