Method for preparing manganese series lithium-ion sieve adsorbent H4Mn5O12 and precursor thereof

• Main Authors: XU HUI, CHEN BAIZHEN, YANG XIYUN, SHI XICHANG, MA LIWEN, CHEN YA
• Format: Patent
• Language: Chinese; English
• Published: 16.03.2011
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; INORGANIC CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention provides a method for preparing a manganese series lithium-ion sieve adsorbent H4Mn5O12 and a precursor thereof, relating to a preparation method of an inorganic adsorbent for absorbing lithium from liquid lithium resources such as salt brine, seawater, geothermal water and the like. In the preparation method, manganese salts and lithium salts with low melting points are taken as raw materials, organic carboxylic acid is used as an ingredient, the precursor Li4Mn5O12 is obtained through soft chemical synthesis and low-temperature roasting; acid treatment is carried out on the precursor, and Li in the precursor is extracted to be converted to an H-type ion sieve represented by H4Mn5O12 or MnO2.0.31H2O; and the H-type ion sieve H4Mn5O12 is filtered, washed and dried to obtain the adsorbent capable of sieving lithium ions. The method of the invention has simple process, and the obtained ion sieve has the advantages of small dissolving loss, fast adsorption rate and high adsorption capacity.