Preparation method of bauxite-based aluminum lithium ion adsorbent and method for extracting lithium from brine

• Main Authors: ZHANG YONGSHENG, GUI BAOLING, ZHENG MIANPING, XING ENYUAN, SU KUI, QIAN CHENG
• Format: Patent
• Language: Chinese; English
• Published: 09.01.2024
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a preparation method of a bauxite-based aluminum lithium ion adsorbent and a method for extracting lithium from brine, belongs to the technical field of lithium ion enrichment and extraction in lithium-containing energy mineral products, and aims to solve the problems of high consumption of chemical reagents and poor economical efficiency of raw materials for synthesizing an aluminum adsorbent by adopting an AlCl3, NaOH and LiCl co-precipitation mode in the prior art. The method comprises the following steps: mixing bauxite particles and sodium hydroxide powder, and heating to obtain first particles; mixing the first particles with tetraethoxysilane, filtering to obtain a first solid phase, and heating to react to obtain second particles; and mixing and stirring the mixed liquid and the second particles, carrying out a stirring reaction to obtain a second solid phase, and drying the second solid phase to obtain the bauxite-based aluminum lithium ion adsorbent. The method can be used fo