【Ten Years of Rapid Development in Chemical Technology】Investments in salt lakes from 2007 to 2023 exceeded 7 billion yuan; a lithium salt production project with an annual capacity of 40,000 tons was put into operation using adsorption technology

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Ten years of rapid development in chemical technology – praise for China’s prosperity and strength. This is just a starting point; more participation will make things even more lively. HaiChuan becomes even better with your involvement; we welcome everyone to take part in discussions on the forum. Everyone should pay attention to safety and know how to handle emergencies. ********************************************* On June 6, 2023, Qinghai Salt Lake Industry Co., Ltd. began construction of a 40,000-ton-per-year integrated lithium salt production facility at the Qarhan Salt Lake. The project will be built over two years to achieve an annual production capacity of 20,000 tons of battery-grade lithium carbonate and 20,000 tons of lithium chloride. The project uses adsorption to extract lithium chloride from aged brine, and it consists of five process units: salt pans and storage tanks, adsorption for lithium extraction, membrane purification and concentration, reaction for lithium precipitation, and lithium chloride production. The process first uses a lithium-selective adsorbent to absorb the lithium ions from brine containing old brine or from lithium-rich solutions obtained through solar evaporation in salt pans. The lithium ions are then eluted, yielding a solution that meets the required standards; the residual adsorption liquid is returned to the large-scale circulation system of the potash fertilizer salt pans ； The adsorbed qualified solution is refined into a high-lithium qualified solution through membrane separation coupled with electrodialysis concentration technology, continuous ion exchange technology, and MVR evaporation concentration technology ； The high-lithium qualified liquid is divided into two streams: one stream is used to produce battery-grade lithium carbonate through a lithium precipitation reaction, while the other stream is used to produce lithium chloride through evaporation and desalination.