Essential Raw Material Research Articles

CO2 free production of ethylene oxide via liquid phase epoxidation of ethylene using niobium oxide incorporated mesoporous silica material as the catalyst.

Ethylene Oxide (EO) is an essential raw material used in various consumer products like different glycol derivatives, ethoxylates, and polymers. We hydrothermally synthesize niobium oxide incorporated with mesoporous silica material (Nb/MSM), an efficient catalyst for CO2 free-ethylene oxide (EO) production via partial oxidation of ethylene. The structural properties of Nb/MSM catalysts were characterized using XRD, TEM, and N2 adsorption-desorption. The catalytic activity of synthesized materials in liquid phase epoxidation (LPE) of ethylene was evaluated in the presence of peracetic acid (PAA) as an oxidant to avoid the production of CO2 and also minimize metal leaching. GC chromatography was used to investigate the successful production of EO, and a peak with a retention time (RT) of 9.01 min served as confirmation. Various reaction parameters viz. temperature, catalyst concentration, ethylene to PAA molar ratio, and solvent effect were investigated in order to optimize the reaction conditions for enhancing the ethylene conversion and selectivity for EO production. By this approach, the challenges of greenhouse gas production and metal leaching were addressed which were associated with previously reported catalysts.

Do Geopolitical Tensions and Economic Policy Uncertainties Reorient Mineral Imports in the USA? A Fat-Tailed Data Analysis Using Novel Quantile Approaches

Mineral resources are essential raw materials to generate electricity, fuel vehicles, and heat homes and workplaces. Besides, the global agenda of clean energy deployment, including solar photovoltaics (PV), wind turbines, electric vehicles (EV), and storage facilities, calls for a considerable volume of critical minerals, which elevates their respective import demands. This highly concentrated source of those minerals poses a significant concern triggered by the augmented geopolitical tensions and economic policy uncertainties. In light of this context, our objective is to estimate the response of mineral import demand to global geopolitical risk events and economic policy uncertainty covering monthly data from January 1996 to December 2020. In doing so, we apply the cross-quantilogram (CQ) and the quantile-on-quantile (QQ) regression approaches due to the fat-tailed nature of the data property. Besides, these quantile-based data analysis procedures are appropriate for non-normal data sets and show the co-movement of the variables of interest under a bi-variate modelling approach. More importantly, these two techniques also exhibit the quantile connectedness among the variables in the bearish and bullish conditions. Moreover, our findings show that mineral import demand responds negatively to the USA’s (own) and global geopolitical risk events at the high quantiles under long memory. In addition, this demand reacts positively to the USA’s (own) and global economic policy uncertainty in entire quantiles under long memory. Therefore, our policy suggestions are concerned with tackling geopolitical tensions and economic policy uncertainty by adopting pre-emptive measures within a viable institutional mechanism to continue impressive mineral trade flows.

Technology Focus: Water Management (December 2022)

2022 has presented many challenges—not just inflation. Lowering water levels at Lake Mead and Lake Powell resulted in water crises in many states. Globally, many rivers dried, and that brought to surface over-5,000-year-old archeological artifacts that had been buried. An United Nations report says that nearly 4 billion people (approximately 60% of the world population) face water crises at least for a month every year. Despite all these admonishments, water—an essential raw material in industrial sector and a vital resource for human living—could be handled with more value and respect. The dollar value of water usage is much lower in the US compared with other regions, where it is more than twice its purchased value. The last 30 years or so have seen scientists and environmentalists apply conscientious use of technologies that focused on making water resources sustainable—chemistries that help us treat water, and intuitive and intelligent technologies that minimize need and maximize its purpose and benefit, remove contaminants, and ready it for repurposing. We can agree that awareness is universal, but when it comes to enforcing the actions needed to protect the resource as sustainable, questions about scalability and economic feasibility of many of the novel technologies arise. The three papers chosen for publication share different approaches to chemically managing high-salinity produced water through commercially viable approaches. The identification of processes to treat high salinity levels and the approaches to alter and control the process make the papers not only good for discussion but also practical for all players, big and small. The introduction of chemistries that are tagged and measurable positively influence discharge restrictions in different regions and could be exploited to stretch water reuse and the dollar value of water. The advent of smart sensors, probes, handhelds such as portable X-ray fluorescence and X-ray diffraction sensors, and machine learning make the treatment and reuse of high-saline water feasible to alleviate the water crisis. Technologies have advanced to lower the energy consumption and usage cost of membrane separation most commonly used in the water-reuse sector. The use of fresh water by the industry could be reduced significantly with the adaptation of some or all the smart technologies available today. The industry and the public are at a crossroads today, fighting for the right to use water. Governments are struggling to keep the balance and make the scarcest resource available to both sides. Let there not be another Akkadian empire that becomes extinct because of water. Recommended additional reading at OnePetro: www.onepetro.org. SPE 200171 Optimizing Waterflood Performance in Mature Fields Using Autonomous Inflow Control Valve Technology by Sufyan Shihab, Petroleum Development Oman, et al. SPE 209256 Improved Reverse-Osmosis Membranes for Treating Produced Water by Rich Franks, Nitto-Hydranautics, et al. SPE 204840 A Nano Method for a Big Challenge: Nanosilica-Based Sealing System for Water Shutoff by Ayman Almohsin, Saudi Aramco, et al.

Designing eucalyptus replanting model using hybrid simulation method : a review

The main objective of this paper is to find out the concept of designing the eucalyptus plant replanting model using a hybrid simulation method. Logically, single simulation is much easier to apply than hybrid simulation because its procedure is simpler and easier to do. However, it is possible for hybrid simulation to be the best solution in solving problems. Based on previous studies, hybrid simulation which combines agent based model and dynamics system is the right solution in answering this research study object. The eucalyptus plant replanting model is computerized and uses a causal loop diagram. Furthermore, this model will be simulated in two ways, namely (1) a state chart area and (2) stock and flow. This systematic review identified twelve articles and one book related to the topic discussed. In addition, with this hybrid simulation system, it is hoped that the availability of eucalyptus plant as an essential raw material in the pulp and paper mill can be maintained, and it can increase the company's profitability. Here we provide details of Hybrid Simulation using the Agent-Based Modeling and System Dynamics Modeling that underlines our research study.

A Review on the Effect of the Mechanism of Organic Polymers on Pellet Properties for Iron Ore Beneficiation.

Iron ore pellets not only have excellent metallurgical and mechanical properties but are also essential raw materials for improving iron and steel smelting in the context of the increasing global depletion of high-grade iron ore resources. Organic polymers, as important additive components for the production of high-quality pellets, have a significant impact on the formation as well as the properties of pellets. In this review, the mechanisms of organic polymers on the pelletizing properties, bursting temperature, and pellet strength at low and high temperatures, as well as the existing measures and mechanisms to improve the high-temperature strength of the organic binder pellets are systematically summarized. Compared with traditional bentonite additives, the organic polymers greatly improve the pelletizing rate and pellet strength at low temperatures, and significantly reduces metallurgical pollution. However, organic binders often lead to a decrease in pellet bursting temperature and pellet strength at high temperatures, which can be significantly improved by compounding with a small amount of low-cost inorganic minerals, such as bentonite, boron-containing compounds, sodium salts, and copper slag. At the same time, some industrial solid wastes can be rationally used to reduce the cost of pellet binders.

Production, Properties and Applications of Xylooligosaccharides (XOS): A Review

Xylooligosaccharides derived from Xylan, significant component of hemicellulose in lignocellulosic plant biomass, are essential raw materials used in the food, pharmaceutical and agricultural industries. They find application in these industries due to their unique physicochemical properties such as pH stability, growth regulatory ability, and anti-allergic property. In addition, they have been shown to exhibit promising antimicrobial, anti-cancer, antioxidant and anti-inflammatory activities. Xylooligosaccharides convert waste into valuable foods, pharmaceuticals, and agricultural products, promoting health, the economy, and the environment.

Analysis of Substance Flow and the Transition of Industrial Structure of Indium in Japan

Indium is a rare metal that is an essential raw material for indium tin oxide (ITO) essential for transparent electrodes for displays. However, its supply is unstable as it is a by-product of zinc. In this research, we investigated the domestic substance flow of indium used for liquid crystal applications in Japan. Accordingly, we quantitatively evaluated the amount of indium contained in the process loss and the content of indium in end-of-life products. Through this quantification, we examined the visualization of loss in the entire flow and the usability of end-of-life products as secondary production. Consequently, it was found that the amount of indium used in the production of end-use-products in Japan has increased significantly due to the growth of liquid crystal display TVs, particularly in preparation for the transition to terrestrial digital broadcasting in 2011, and has drastically decreased after 2012. Meanwhile, some manufacturing bases have been relocated from Japan to other countries, and a certain proportion of end-use-products are imported, by which we infer the domestic input amount of end-use-products in recent years is estimated to have remained at approximately 4 t. Based on the result, after having continued to increase to the maximum value of approximately 70 t in 2014, the in-use stock has exhibited a gradually decreasing trend. Moreover, the indium content in end-of-life products has continued to increase, and in 2015, it exceeded the amount of the end-use-products input into society. Furthermore, compared with the process loss at the time of processing from ITO to a display, the gap has been narrowed from 100 times or more, and the indium content in end-of-life products in 2008 to about 15 times in 2017. These results suggest that the recycling potential of end-of-life products has increased with the spread of indium-based products.

Electrochemistry Isolates Elemental Phosphorus from Mg3(PO4)2

Phosphorus (P) is an essential raw material for many value-added chemicals in modern industry, yet the natural minerals to extract P are depleting. As an alternative, municipal wastewater is a promising secondary source of P. Recovery of P from wastewater by chemically induced precipitation as insoluble metal phosphates is a typical practice. Mg3(PO4)2 is a commonly found phosphate in sewage sludge or incinerated sewage sludge ash. Here we try to extract elemental P from Mg3(PO4)2 by electrochemistry. By using molten CaCl2 as the solvent, PO4 3− in the Mg3(PO4)2 crystal can be quickly leached into the melt as free ions. The presence of Mg2+ in the melt boosts the solubility and dissolution rate of PO4 3− significantly. High-purity elemental P can be isolated from free PO4 3− in the melt by electrolysis. This work demonstrates that Mg3(PO4)2 is a possible precursor to prepare elemental P by electrochemistry, though the negative influence of Mg2+ of forming solid MgO on the electrode surface during electrolysis needs to be addressed.

Conductometric acetic anhydride gas sensors based on S-doped porous ZnO microspheres with enhanced Lewis base interaction

Acetic anhydride is an essential raw material for manufacturing the drug heroin. Its rapid detection using semiconductor sensors has great significance to curb the spread of drugs. However, there are few reports on the design of semiconductor sensors for acetic anhydride, and the sensing mechanism remains unclear. For this reason, the strategy enhancing the Lewis base sites on the ZnO surface via S-doped is proposed in view of the Lewis acid properties of acetic anhydride combined with Lewis acid base theory. The synthesized S-doped porous spherical ZnO (S-ZnO-600) sensor response (312.4) to 100 ppm acetic anhydride is 4.9 times than ZnO-600 (64.1) with a detection limit of 200 ppb. X-ray photoelectron spectroscopy (XPS), Electron paramagnetic resonance (EPR) and the electron localization function (ELF) indicate that S-doped greatly modulates the electronic structure of ZnO through lattice defects. Meanwhile, the increase of Lewis basicity on the ZnO surface through S doping is further confirmed using CO2 temperature programmed desorption (CO2-TPD), the frontier molecular orbital and the charge density difference (CDD). Gas-phase mass spectrometry (GP-MS) combined with DFT further reveals the catalytic degradation of acetic anhydride sensing process.

In situ measurement and management of soil, air, noise and water pollution in and around the Limestone mining area of Yerraguntla, YSR kadapa, Andhra Pradesh, India for the sustainable development

For emerging countries, mining has been a vital factor in employment, economic development, infrastructure, and supply of essential raw materials for Nation’s Gross domestic product (GDP) growth. The Limestone mine industry is serving as a viable route for economic transformation in India. Limestone exploration causes major damage to the environment at Yerraguntla industrial zone, YSR Kadapa district, Andhra Pradesh, India. The main objective of this study is to evaluate the environmental Pollution parameter that causes Air, Water, Noise, and Soil pollution in and around limestone quarries started in the early 1984. The present study estimated Air Quality Index (AQI) as 76 based on the air quality sub-index approach using four pollutants (PM10, PM2.5, SO2, NOx) for a period of 24 hrs by taking one sample per hour during the post monsoon. Water Quality Index (WQI) obtained as 303.91 from fourteen physicochemical parameters (pH, EC, fluoride, Total alkalinity etc.) measured from water samples. Soil quality was determined using four physicochemical parameters (pH, EC, WHC, Calcium and Magnesium) from the soil samples collected from ten sampling stations. The obtained pH range was (7.6 to 9.4), EC of the soil was determined as 4,140 µs/cm, the water retention capacity of the soil, ranges from (17.68 to 97.68) %, and the Calcium (Ca2+) and Magnesium (Mg2+) ranged from 74.5 to 272.75 mEq/L. Noise levels were determined as 76.64 dB in the mine’s, 58.16 dB in the cement industry, and 52.285 dB in the mine surrounding villages. This study can help mining sector management’s in developing a sustainable Environmental Management frame work to meet the world sustainable development goals (SDGs).

Characterization of Bioactive Compounds from Patchouli Extracted via Supercritical Carbon Dioxide (SC-CO2) Extraction.

Patchouli extracts and oils extracted from Pogostemon cablin are essential raw material for the perfume and cosmetics industries, in addition to being used as a natural additive for food flavoring. Steam distillation is a standard method used for plant extraction. However, this method causes thermal degradation of some essential components of the oil. In this study, patchouli was extracted with supercritical carbon dioxide (SC-CO2) under different conditions of pressure (10–30 MPa) and temperature (40–80 °C). The chemical components of the crude extracted oil and the functional group were characterized using gas chromatography-mass spectrometry (GC-MS) and Fourier Transform Infrared Spectroscopy (FT-IR). The extraction with supercritical carbon dioxide was shown to provide a higher yield (12.41%) at a pressure of 20 MPa and a temperature of 80 °C. Patchouli alcohol, Azulene, δ-Guaiene, and Seychellene are the main bioactive compounds that GC-MS results have identified. FTIR spectra showed alcohol, aldehyde, and aromatic ring bond stretching peaks. Extraction of patchouli with supercritical carbon dioxide provided a higher yield and a better quality of the crude patchouli oil.

Assessment of Opinion and Awareness of the Construction Industry on Suitability of M Sand as a Replacement to River Sand

Fine aggregates are an essential raw material required for concrete production. Majority of the fine aggregate demand is supplied through natural river sand. However, river sand mining is not sustainable in the long run and impacts the environment severely. A more sustainable and cost-effective replacement to river sand should be adopted quickly. Manufactured sand or M sand is a promising alternative to river sand. The suitability of M sand as a replacement to river sand and the opinions and perspective of the construction industry were assessed by doing a comprehensive literature review and collecting data from industry professionals through a questionnaire. The questionnaire was assessed under their categories such as performance, economy, environmental and general. Respondents were also asked to grade their presumed knowledge on each category being assessed, in order to evaluate the validity of individual opinions. The results indicated that the opinion of construction industry professional’s regarding M sand on economic and environmental aspects are similar to the findings of the literature. However, the professionals opinions regarding performance aspects of M sand was mostly mixed and contradicts with literature findings. Professionals who rated their knowledge highest had different opinions about M sand indicating the presence of severe misconceptions and inadequate knowledge within the industry. To overcome this, industry professional’s knowledge on M sand should be raised by providing accurate information about M sand and its benefits. Furthermore, the industry professional’s opinions acknowledged that M sand is being currently underused within the industry. They were confident that in future, M sand use would increase drastically.

Evaluation of Genetic Potential of Cotton Lines against Whitefly Tolerance

Cotton (Gossypium hirsutism L.) is a primary source of natural fiber, fuel, wood, and oil worldwide and an essential raw material source for the textile industry. Whitefly (Bemisia tabaci) is one of the major pests distributed worldwide and has broad genetic diversity. In this research, the genetic diversity in the cotton germplasm was explored against the whitefly infestation. Broad sense heritability is a common approach used to detect the association and inheritance of the target trait. Maximum (PIC 0.96) and minimum (PIC 0.36) polymorphism was explored by the SSR primer NAU 988 and NAU 5121, respectively, with an average value of 0.73. Pair-wise genetic estimation ranged from 0.500 to 1.00. Neighbor-joining (NJ) tree, based on UPGMA (Unweighted pair group method with arithmetic), grouped the genotypes into six main clusters, i.e., A, B, C, D, E, and F. Maximum accessions fall into a single cluster showing low genetic diversity among them. The upland cotton accessions FH 326, SLH 07, FH18, and Cris 541, showed divergence from the rest of the genotypes and might have resistance against the whitefly attack. Our results also explain the utilization of the SSR markers to explore genetic diversity and its utilization in a cotton breeding program.

The Changpa and Ladakh Pashmina: Craft Revivalism, Skill Development and Ecology in Ladakh, India

Abstract Pashmina is one of the most expensive natural fabrics in the world, and yet the lives of those who produce this rare fibre in India is very tough. The Changpa of eastern Ladakh and western Tibet have for centuries supplied the fabled Kashmiri shawl industry with its essential raw material - pashm. However, many nomadic and semi-nomadic herder families seem disillusioned with their traditional lifestyles and are migrating to settlements near Leh town to become masons, contractors or tour guides. This migration will have significant socio-cultural, economic, strategic and ecological ramifications. Efforts are being made to give them reasons to continue with their age-old practices. How do we ensure that ecological concerns are addressed so as to arrive at sustainable growth for all concerned? In this article we discuss these general issues in the particular context of Ladakh and put forward some solutions.

Mechanism of HCA and CEPPA in flotation separation of cassiterite and fluorite

As an essential raw material for the tin industry, cassiterite ore needs to be effectively separated and purified, and the removal of impurities such as fluorite becomes the key to cassiterite flotation. In this study, the flotation separation of cassiterite (SnO2) and fluorite (CaF2) was enhanced by using hydroxylcitric acid (HCA) as fluorite inhibitor and 2-carboxyphenyl phosphonic acid (CEPPA) as collector. With a reagent scheme of 120 mg/L CEPPA and 4.5 mg/L HCA at pH 10.0, the flotation recovery of cassiterite and fluorite was 92.80% and 13.57%, respectively. Under the same experimental conditions of artificially mixed mineral flotation, the flotation index of cassiterite concentrate grade 78.19% and recovery 90.29% was obtained. The selective adsorption mechanism of CEPPA and HCA on minerals was investigated by Zeta potential, Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The results showed that CEPPA anions had chemically adsorbed on cassiterite and fluorite, and the adsorption of HCA on fluorite surface was stronger than that on cassiterite surface. XPS analyses further confirmed that Ca sites exposed on fluorite had a stronger affinity for HCA than cassiterite. Furthermore, the addition of HCA had little effect on the adsorption of CEPPA on cassiterite, while the strong chemisorption of HCA on fluorite surface prevented the adsorption of CEPPA on fluorite. These results provide a theoretical basis and promising new strategy for the flotation separation of cassiterite and fluorite.

Effects of subsidy and regulation policy on soil and water resources of cotton planted lands in Harran Plain, Turkey

Cotton (Gossypium hirsutum L.) provides essential raw material used in the textile, feed, and vegetable oil sectors. Therefore, it is a strategic crop for agricultural, economic, and political strategies around the world. Accurate monitoring of the changes in the cotton production patterns is crucial for decision-makers. Turkey is among the top ten cotton producers and ranks fourth in the world for cotton imports. One third of the total cotton production in Turkey comes from the southeastern Anatolia region of the country. This study analyzed the impact of subsidy and regulation policies on fluctuations in cotton production areas and soil and water quality in Harran Plains, southeastern Anatolia region Turkey. Time-series (between 2016 and 2021) satellite images were utilized to determine actual crop rotation in the study area. Turkish Government implemented a new rule for crop subsidies in 2020 which stated that a farmer will be eligible for subsidy for two consecutive years; however the subsidy will not be paid if the same crop is planted in the third year. Cotton was cultivated in 83 % of the Harran plains prior to new subsidy regulation, which decreased to 26 % after the new regulation. Sudden decrease in cotton cultivation area clearly indicated that farmers need public support to cover the costs in agricultural production. The Gross Production Value (BPV) for each crop was calculated to determine the impact of subsidy regulation on economic value of crops in the rotation.The GPV in 2020 was 2.903,7 $ ha−1 that was 33.6 % and 20.5 % lower than 2019 and 2021, respectively. The results indicated that crop subsidies significantly altered the crop selection behavior of farmers. Water requirement of crops in rotation between 2016 and 2021 was calculated to assess the effects of subsidy changes on water consumption. Cotton cultivation over a large part of the plains during the same season caused excessive water consumption, rise in groundwater level over time, soil salinity and severe water erosion. However, cotton cultivation area as well as water consumption in Harran plain new significantly decreased with the new subsidy regulation; therefore, water consumption in 2020 was the lowest among the time frame evaluated. Total sediment losses through surface runoff from the Harran Plain was estimated as 0.83 tons ha−1 per year. The results revealed that subsidies exert significant impacts on the gross production value in the region, amount of irrigation water consumed, and quality of soil and water resources in addition to the impact on the decision of farmers for crop selection.

Double-Cavity Nor-Seco-Cucurbit[10]uril Enables Efficient and Rapid Separation of Pyridine from Mixtures of Toluene, Benzene, and Pyridine.

Benzene, toluene and pyridine are widely used as essential raw materials in industry and laboratory research, with stringent purity requirements. Herein, we show that solid double-cavity host nor-seco-cucurbit[10]uril (ns-Q[10]) functions as an efficient adsorption separator for pyridine; benzene and toluene can be obtained in >99.9 % purity by this method. Thermal removal of pyridine from ns-Q[10]⋅Py2 allows 10 separation cycles without erosion of performance. The geometry of the ns-Q[10]⋅Py2 ternary complex was established by single-crystal X-ray diffraction methods. The ns-Q[10] cage facilitates the removal of pyridine from toluene and benzene, with >99.9 % purity for the separated compounds.

Double‐Cavity Nor‐Seco‐Cucurbit[10]uril Enables Efficient and Rapid Separation of Pyridine from Mixtures of Toluene, Benzene, and Pyridine

AbstractBenzene, toluene and pyridine are widely used as essential raw materials in industry and laboratory research, with stringent purity requirements. Herein, we show that solid double‐cavity host nor‐seco‐cucurbit[10]uril (ns‐Q[10]) functions as an efficient adsorption separator for pyridine; benzene and toluene can be obtained in >99.9 % purity by this method. Thermal removal of pyridine from ns‐Q[10]⋅Py2 allows 10 separation cycles without erosion of performance. The geometry of the ns‐Q[10]⋅Py2 ternary complex was established by single‐crystal X‐ray diffraction methods. The ns‐Q[10] cage facilitates the removal of pyridine from toluene and benzene, with >99.9 % purity for the separated compounds.

Leren van je bazen. De totstandkoming van de metaal-cluster van Tegelen, 1855-1914

Contemporary understanding of the industrial history of Tegelen is largely confined to its former ceramic industry. The local metal industry, however, also deserves appraisal. This article is a first attempt to bring together the fragmented body of literature on this topic and, by adding additional sources and theories, to arrive at new insights into the emergence of the metal cluster in Tegelen. The empirical findings testify to a development trajectory that is quite remarkable as entrepreneurs were confronted with a set of challenges unfavourable to economic growth throughout the formative years of the industry. These challenges included: the absence of essential raw materials; a lack of specialised knowledge available in close proximity; and limited accessibility due to a variety of issues related to the (extra)regional infrastructure. In view of these bottlenecks, the article sets out to answer the following three research questions: Why did the pioneering entrepreneurs choose Tegelen as their place of business? How did they manage to overcome the challenges on their path? And which factors and dynamics ultimately led to cluster formation? In answering these questions, close attention is paid to the Kamp & Soeten firm - the first and for a long time the only metal company in Tegelen. During its monopoly position, which lasted no less than 33 years, Kamp & Soeten helped create the conditions for a new branch of industry to flourish in the Tegelen region.

Improving China’s Global Lithium Resource Development Capacity

Flourishing sales of new electric vehicles have led to a considerable surge in demand for the vital, upstream raw material, lithium (Li). As an essential energy metal and raw material for the production of batteries, lithium has become indispensable to the electric vehicle industry. It has been identified as a strategic, emerging industrial mineral in China. Based on a literature review and qualitative analysis of the imbalance between the supply and demand of lithium raw materials in China, this paper analyzes the current challenges of China’s lithium supply chain, especially mining, pricing and recycling, that are obstructing the realization of China’s carbon neutrality. On this basis, relevant policy suggestions are proposed from three perspectives: strengthening lithium resource development and reserve capacity, promoting international cooperation for lithium supply, and properly regulating the circular economy of domestic lithium resources.