Abstract

A preparation method for a titanium-based lithium ion exchanger includes the following steps: step 1, preparation of lithium metatitanate precursor, namely, uniformly mixing titanium source, lithium source and water in proportion by ball milling, adding an adjuvant, and allowing reaction by ultrasonic heating and stirring, so as to obtain the lithium metatitanate precursor powder; step 2, preparation of lithium metatitanate powder, including spray drying and microwave calcination with the lithium metatitanate precursor to obtain the lithium metatitanate powder; and step 3, elution and replacement, namely, leaching out Li with an eluent to obtain lithium ion exchanger. The preparation method is a solid-liquid phase contact reaction so that the ratio of raw materials can be accurately controlled. The synthesis reaction is strengthened by ultrasound. Titanium is controlled at a relatively excessive proportion to prepare the lithium metatitanate powder with high porosity and good filterability.

IPC Classes  ?

• B01J 39/08 - Use of material as cation exchangersTreatment of material for improving the cation exchange properties

Abstract

The invention relates to a mesoporous aluminum-based lithium adsorbent, and a preparation method therefor and a use thereof. The preparation method comprises: step 1) preparing a mesoporous aluminum-based lithium adsorbent precursor; step 2) molding and granulating; and 3) washing with water and drying to obtain a mesoporous lithium adsorbent. The mesoporous aluminum-based lithium adsorbent is a spherical porous material, precursor pores thereof before molding and granulating are in the shape of an irregular polygon, and the most probable pore size is 3-20 nm. The mesoporous aluminum-based lithium adsorbent has high lithium adsorption capacity, a high lithium extraction rate, good cycle stability, and a lithium elution rate and a lithium recovery rate which are both greater than 95%. The mesoporous aluminum-based lithium adsorbent can be highly selectively used for extracting lithium from salt lake brine having a high magnesium-to-lithium ratio and salt lake brine having high sodium and potassium content.

IPC Classes  ?

• 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 20/30 - Processes for preparing, regenerating or reactivating

Abstract

The present invention relates to a preparation method for a high-adsorption-capacity granular aluminum salt lithium extraction adsorbent. The method comprises: Step 1, preparation of lithium-intercalated aluminum salt precursor slurry: uniformly mixing an aluminum source, a lithium source, and water, and then adding an alkali liquor to adjust the pH value so as to obtain the lithium-intercalated aluminum salt precursor slurry; Step 2, integrated granulation: 1) preparing a VC composite adhesive, (2) blending and homogenizing, and (3) granulating; and Step 3, drying and activation: drying, washing, and activating a granulated adsorbent to obtain a granular aluminum salt lithium extraction adsorbent. The environmentally friendly aluminum salt lithium extraction adsorbent prepared by the method has the advantages of high porosity, high lithium adsorption capacity, high lithium extraction rate, long cycle service life, etc.; the adsorbent can be effectively used for lithium extraction of salt lakes having a high magnesium-lithium ratio and a low lithium grade, comprising lithium chloride type salt lakes, lithium sulfate type salt lakes, and mixed salt lakes of the lithium chloride type salt lakes and the lithium sulfate type salt lakes; and the adsorbent shows good adsorption activity and selectivity. The preparation method has short technological process, can be simply operated, is green and clean, and has good industrial application value.

IPC Classes  ?

• B01J 20/24 - Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
• 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
• C02F 1/28 - Treatment of water, waste water, or sewage by sorption

Abstract

The present invention relates to a method for preparing an aluminum salt functional material for lithium extraction. The method comprises: step 1, preparation of a precursor slurry of an aluminum salt functional material, involving: mixing polyaluminum, a lithium source and water in proportion, adding an additive thereto, carrying out ultrasonic stirring to obtain a mixed salt solution, adding an alkali liquor or a basic salt solution to the mixed salt solution at a certain flow rate, adjusting the pH value, and then stirring same at a constant temperature for a reaction to obtain a precursor slurry of a lithium-intercalated aluminum salt functional material; and step 2, preparation of an aluminum salt functional material for lithium extraction, namely, subjecting the precursor slurry obtained in step 1 to solid-liquid separation, washing and drying to obtain an aluminum salt functional material for lithium extraction. In the present invention, inexpensive polyaluminum is used as an aluminum source, and polyaluminum has good water solubility and is used for synthesizing, together with an alkali, an aluminum salt functional material for lithium extraction in one step; and the reaction rate is high, the process is short, and the cost is low. The method can prepare an aluminum salt functional material for lithium extraction with a high specific surface area, a high porosity and a high lithium adsorption capacity by means of strengthening via a freeze-drying technique, and the prepared material can be used well for extracting lithium from salt lake brine with a high content of impurities, and has a high lithium extraction speed, high selectivity and potential application value.

IPC Classes  ?

• 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
• 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
• C02F 1/28 - Treatment of water, waste water, or sewage by sorption

Abstract

The present invention relates to a preparation method for a high-adsorption-capacity granular aluminum salt lithium extraction adsorbent. The method includes the following steps: step 1, preparation of lithium-intercalated aluminum salt precursor slurry: uniformly mixing an aluminum source, a lithium source and water, and then adding alkali liquor to adjust the pH value so as to obtain the wet lithium-intercalated aluminum salt precursor; step 2, integrated granulation: 1) preparing a VC composite adhesive; 2) blending and homogenizing; 3) granulating; and step 3, drying and activating: drying, washing and activating the granulated adsorbent to obtain the granular aluminum salt lithium extraction adsorbent. The environment-friendly aluminum salt lithium extraction adsorbent prepared by the method has the advantages of high porosity, high lithium adsorption capacity, high lithium extraction rate, long cycle service life and the like, is effectively used for lithium extraction of salt lakes with high magnesium-lithium ratio and low lithium grade, including lithium chloride type salt lakes, lithium sulfate type salt lakes and salt lakes combining the two types; and good adsorption activity and selectivity are shown. The preparation method is short in technological process, simple to operate, green and clean, and has good industrial application value.

IPC Classes  ?

• B01J 20/30 - Processes for preparing, regenerating or reactivating
• C08K 3/01 - Use of inorganic substances as compounding ingredients characterised by their specific function
• C01D 15/00 - Lithium compounds
• C02F 1/28 - Treatment of water, waste water, or sewage by sorption
• C08L 5/04 - Alginic acidDerivatives thereof
• C08L 5/08 - ChitinChondroitin sulfateHyaluronic acidDerivatives thereof
• C08L 5/12 - Agar-agarDerivatives thereof
• C08L 29/04 - Polyvinyl alcoholPartially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
• C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
• C22B 26/12 - Obtaining lithium

Abstract

The present invention relates to a preparation method for a functional material for extracting lithium from an aluminum salt. The method includes the following steps: step 1, preparation of an aluminum salt functional material precursor slurry: mixing polyaluminum, a lithium source and water in proportion, adding an additive, performing ultrasonic stirring to obtain a mixed salt solution, adding an alkali liquor or a basic salt solution into the mixed salt solution at a certain flow rate, adjusting the pH value, and then performing constant-temperature stirring reaction to obtain a lithium-intercalated aluminum salt functional precursor slurry; and step 2, preparing a functional material for extracting lithium from an aluminum salt, namely performing solid-liquid separation, washing and drying on the precursor slurry obtained in the step 1 to obtain the functional material for extracting lithium from an aluminum salt. According to the present invention, cheap polyaluminum is adopted as an aluminum source, and the water solubility is good; the functional material for extracting lithium from an aluminum salt is synthesized with alkali in one step, with high reaction rate, short process and low cos. According to the method, the functional material for extracting lithium from an aluminum salt with high specific surface area, high porosity and high lithium adsorption capacity can be prepared by virtue of strengthening of a freeze-drying technology, and the method can be well used for extracting lithium from high-impurity salt lake brine, with high lithium extraction speed, high selectivity, and potential application value.

IPC Classes  ?

• B01J 20/30 - Processes for preparing, regenerating or reactivating
• C01F 7/57 - Basic aluminium chlorides, e.g. polyaluminium chlorides
• C01D 15/00 - Lithium compounds
• C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
• C22B 26/12 - Obtaining lithium

Abstract

The present invention relates to a preparation method for a titanium-based lithium ion exchanger. The method includes the following steps: step 1, preparation of lithium metatitanate precursor, namely, uniformly mixing titanium source, lithium source and water in proportion by ball milling, adding an adjuvant, and allowing reaction by ultrasonic heating and stirring, so as to obtain the lithium metatitanate precursor powder; step 2, preparation of lithium metatitanate powder, including spray drying and microwave calcination with the lithium metatitanate precursor to obtain the lithium metatitanate powder; and step 3, elution and replacement, namely, leaching out Li with an eluent to obtain lithium ion exchanger. The preparation method is a solid-liquid phase contact reaction, the ratio of raw materials is easy to be accurately controlled. The synthesis reaction is strengthened by ultrasound, so as to accelerate the reaction, and the energy consumption is effectively reduced by microwave calcination. Titanium is controlled at a relatively excessive proportion, so as to prepare the lithium metatitanate powder with high porosity and good filterability. The prepared lithium ion exchanger has good lithium extraction performance and low solution loss of titanium, which satisfy the requirements for practical use.

IPC Classes  ?

• B01J 20/02 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material
• H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
• B01J 20/30 - Processes for preparing, regenerating or reactivating
• C01G 23/00 - Compounds of titanium

Abstract

The present invention relates to a preparation method for a high-adsorption-capacity granular titanium-based lithium ion sieve adsorbent. The method includes the following steps: step 1, preparing titanium-based lithium ion sieve precursor powder; step 2, preparing high-adsorption-capacity granular titanium-based lithium ion sieve adsorbent: 1) pretreatment of precursor powder; 2) preparing a composite adhesive; 3) doping, blending and homogenizing; 4) molding and granulating; and 5) eluting and replacing. The granular adsorbent prepared according to the present invention has relatively high porosity, shows good suspension property when being used for extracting lithium from salt lake brine or simulated brine, and is high in adsorption-desorption rate and high in lithium extraction activity; the lithium ion selectivity and the elution rate can reach 95% or above; the granular adsorbent is stable in structure, low in solution loss and long in cycle service life; the molding and granulating process of the granular adsorbent is simple and easy to control, and industrialization is easy to realize.

IPC Classes  ?

• B01J 20/32 - Impregnating or coating
• B01J 20/02 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material
• C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
• C22B 26/12 - Obtaining lithium

Abstract

The present invention relates to a method for preparing a titanium-based lithium ion exchanger. The method comprises: step 1, preparation of a lithium metatitanate precursor, involving ball-milling a titanium source and then uniformly mixing same with a lithium source and water in proportion, adding an auxiliary agent, subjecting same to an ultrasonic treatment, and heating and stirring same for a reaction to obtain a lithium metatitanate precursor powder; step 2, preparation of a lithium metatitanate powder, involving spray drying and microwave calcination of the lithium metatitanate precursor to obtain a lithium metatitanate powder; and step 3, elution and replacement, involving leaching Li by means of an eluent so as to obtain a lithium ion exchanger. The preparation method involves a solid-liquid phase contact reaction, the ratio of raw materials is easy to accurately control, the synthesis reaction is enhanced by ultrasound, so that the reaction rate is accelerated, and the energy consumption is effectively reduced by means of microwave calcination; the lithium metatitanate powder with high porosity and good filtration performance can be prepared by controlling the titanium proportion to be relatively excessive, and the prepared lithium ion exchanger has good lithium extraction performance and a low titanium solution loss, which can better meet actual usage requirements.

IPC Classes  ?

• B01J 20/02 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material
• B01J 20/30 - Processes for preparing, regenerating or reactivating
• C01G 23/00 - Compounds of titanium
• H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy

Abstract

The present invention is a method for preparing a granular titanium-based lithium ion sieve adsorbent having a high adsorption capacity. The method comprises: step 1, preparing a titanium-based lithium-ion sieve precursor powder; step 2, preparation of a granular titanium-based lithium ion sieve adsorbent having a high adsorption capacity: 1) precursor powder pretreatment, 2) composite glue preparation, 3) doping, blending, and homogenizing, 4) forming and granulating, and 5) elution and substitution. The granular adsorbent prepared in the present invention has a relatively high porosity, and during lithium extraction from salt lake brine or simulated brine, shows good suspension, rapid absorption and desorption rates, and high lithium extraction activity, with both lithium ion selectivity and elution rates reaching 95% or higher; the present granular adsorbent has a stable structure, low dissolution loss, and a long cycle life; and the forming and granulating process of the present granular adsorbent is simple and easy to control, so that industrialization is easy to achieve.

IPC Classes  ?

• C22B 26/12 - Obtaining lithium
• B01J 20/32 - Impregnating or coating
• 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 20/28 - 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
• C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins

Abstract

Provided is a method for preparing battery-grade, high-purity-grade lithium hydroxide and lithium carbonate from high-impurity lithium source and a system therefor. The method comprises the following steps: A. preparation of a lithium salt refined liquid: removing impurities by means of a physicochemical method and deeply removing impurities using an ion exchange chelating resin; B. preparation of battery-grade lithium hydroxide: comprising composite electrodialysis treatment, evaporative concentration crystallization, cooling crystallization, and solid-liquid separation; C. preparation of a high-purity-grade lithium hydroxide: subjecting the battery-grade lithium hydroxide obtained from step B to dissolution, filtration, cooling crystallization, solid-liquid separation, and a post-treatment; D. preparation of high-purity-grade lithium carbonate: subjecting the high-purity-grade lithium hydroxide obtained from step C to dissolution and filtration, introducing carbon dioxide into the filtrate, performing solid-liquid separation, and subjecting same to a post-treatment; and E. preparation of battery-grade lithium carbonate: adding a battery-grade lithium carbonate seed crystal into a substrate, introducing carbon dioxide and a lithium hydroxide solution resulting from the mother liquors obtained in steps B and D for reaction, followed by aging, solid-liquid separation and a post-treatment. Also provided is a system for implementing the method. The method proposes a differentiated physicochemical treatment method according to the difference of impurities in different lithium sources, is adapted to the needs of lithium source quality changes, has a wide adaptability, and has recycled by-products, thus being economical and environmentally friendly.

IPC Classes  ?

• C01D 15/08 - CarbonatesBicarbonates
• C01D 15/02 - OxidesHydroxides

Abstract

Disclosed is a method and a system for preparing battery grade and high purity grade lithium hydroxide and lithium carbonate from high-impurity lithium sources. The method comprises steps for preparation of a refined lithium salt solution, preparation of battery grade lithium hydroxide, preparation of high purity grade lithium hydroxide, preparation of high purity grade lithium carbonate and preparation of battery grade lithium carbonate. The system comprises various subsystems arranged in turn according to production sequence. To treat the high-impurity lithium sources varying in lithium contents, impurity categories and impurity contents, selected emnbodiments provide differentiated combinations of physical and chemical treatment methods to adapt to quality variations of the high-impurity lithium sources and meet quality requirements for production of the battery grade and high purity grade lithium hydroxide and lithium carbonate products.

IPC Classes  ?

• C01D 15/08 - CarbonatesBicarbonates
• B01D 9/00 - Crystallisation
• B01D 15/04 - Separating processes involving the treatment of liquids with solid sorbentsApparatus therefor with ion-exchange materials as adsorbents
• C01D 15/00 - Lithium compounds
• C01D 15/02 - OxidesHydroxides
• C22B 3/22 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means
• C22B 3/42 - Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
• C22B 3/46 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
• C22B 26/12 - Obtaining lithium