PREPARATION METHOD FOR HIGH-ADSORPTION-CAPACITY GRANULAR ALUMINUM SALT LITHIUM EXTRACTION ADSORBENT

• Main Authors: BAN, WENJUN, DENG, LONGFEI, DAI, YIHUA, GAO, FENG, CAI, RONGFU, YANG, JINFENG
• Format: Patent
• Language: English; French
• Published: 04.02.2024
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM; FERROUS OR NON-FERROUS ALLOYS; INORGANIC CHEMISTRY; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

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.