Proposed is an apparatus for continuous wasteless production of a spherically granulated sorbent with a polymeric binder. The apparatus contains a first reactor for preparing a polymer solution in a water-miscible organic solvent and a second reactor that receives the polymer solution from the first reactor and is loaded with a ground inorganic sorbent together with solid, wetting, dispersing additives and a surfactant, whereby a suspension is formed. The suspension is dispersed into a bath filled with water, where drops of the suspension transform into spherical granules of a composite sorbent, the polymer solidifies, and the granules are sent to a water-filled tank to soak the granules and extract the remaining solvent, whereby a spherically granulated sorbent is obtained. The granules are then dried and unloaded into a receiving container. The apparatus is equipped with a system to recover byproducts and return them to the production process.
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
B01J 20/30 - Processes for preparing, regenerating or reactivating
2.
METHOD OF MANUFACTURING INORGANIC ION EXCHANGER FOR SELECTIVE EXTRACTION OF LITHIUM FROM LITHIUM-CONTAINING NATURAL AND TECHNOLOGICAL BRINES
A method of manufacturing an inorganic ion exchanger for the selective extraction of lithium from lithium-containing natural and technological brines is performed by interacting at least one soluble niobium(V) compound with an acid that contains at least one iron(III) compound, thus forming an electrolyte that contains a hydrated niobium(V) oxide and a hydrated iron(III) oxide, which co-precipitate and form a precipitate of a mixed hydrated niobium(V) and iron(III) oxide. The precipitate is washed, an excess of the electrolyte is removed, and the product is granulated with subsequent conversion into a lithium form, which is calcined and is converted to an H-form of the inorganic ion exchanger by treating thereof with an acid solution. the addition of Fe3+ ions contained in the iron(III) compound to the sorbent composition allows obtaining inorganic ion-exchange sorbents with a specific structure, which provides high selectivity, especially for lithium ions.
The proposed method relates to producing inorganic sorbents for extracting lithium from lithium-containing natural and industrial brines. The method consists of a plurality of sequential steps, which include contacting a mixture of a soluble manganese (II) salt and aluminum (III) salt with an alkali solution in the presence of an alkali metal permanganate to obtain a precipitate of a mixed hydrated manganese (III), manganese (IV), and aluminum (III) oxide. After multiple reactions and conversions of intermediate products of the mixed hydrated manganese (III), manganese (IV), and aluminum (III) oxide, the final product is obtained as an ion exchanger in the H-form of high selectivity to lithium.
2O, wherein “a” is a number ranging from 0.5 to 2.0, “b” is a number ranging from 0.01 to 0.5, “c” is a number ranging from 0.01 to 0.2, and “d” is a number ranging from 0.1 to 2.0. The method consists of: interacting a soluble niobate (V) with an acid to form a hydrated niobium (V) oxide and a hydrated tungsten (VI) oxide, which co-precipitate and form a mixed hydrated niobium (V) and tungsten (VI) oxide; granulating the obtained product; converting the granulated product into a lithium form; calcining the lithium form to obtain a mixed granulated tripled lithium, niobium (V) and tungsten (VI) oxide, and converting the lithium-form into an H-form of the inorganic ion-exchanger by treating it with an acid solution.
B01J 45/00 - Ion-exchange in which a complex or a chelate is formedUse of material as complex or chelate forming ion-exchangersTreatment of material for improving the complex or chelate forming ion-exchange properties
C22B 3/42 - Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
The invention provides a method of obtaining inorganic sorbents for extraction of lithium from lithium-containing natural and technological brines. The method consists of steps of obtaining six consecutive non-stoichiometric compound, wherein at the final step the sixth non-stoichiometric compound is obtained by converting the fifth non-stoichiometric compound into a hydrogen-form of inorganic ion-exchanger by treating the fifth non-stoichiometric compound with an acid solution. The method improves selectivity and exchangeability of sorbents to lithium based on manganese oxides, as well as chemical stability of the sorbents in cyclic operations.
B01J 20/30 - Processes for preparing, regenerating or reactivating
B01J 20/08 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group comprising aluminium oxide or hydroxideSolid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group comprising bauxite
7.
Inorganic ion-exchanger for selective extraction of lithium from lithium-containing natural and industrial brines
2O, wherein: “a” is a number ranging from 0.5 to 1.5, “c” is a number ranging from 0.01 to 1.0, and “d” is a number ranging from 0.1 to 2.0. The complex has a total ion exchange capacity of at least 3.5 meq/g and an ion-exchange capacity specifically to lithium of at least 2.5 meq/g. This ion-exchanger is intended for selective extraction of lithium from lithium-containing natural and industrial brines.
Disclosed is a method of producing inorganic sorbents for extracting lithium from lithium-containing natural and technological brines. The method is carried by contacting a soluble niobate (V) with an acid in the presence of at least one zirconium (IV) salt to obtain a precipitate of a mixed hydrated niobium and zirconium oxide. Subsequent steps include granulating the precipitate by freezing, converting the product of granulation into a Li-form, calcining the Li-form, and converting the obtained granulated mixed lithium, niobium, and zirconium oxide into an ion-exchanger in an H-form. In the obtained H-form the inorganic sorbent is ready for use in lithium extraction processes.
B01J 20/02 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material
B01J 20/04 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
B01J 20/06 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group
B01J 20/30 - Processes for preparing, regenerating or reactivating
C02F 1/42 - Treatment of water, waste water, or sewage by ion-exchange
patents