{"title":"优化甲磺酸浸出法，从尼日利亚富含锑的白云石矿中高效提取氧化镁","authors":"Ayo F. Balogun, Alafara A. Baba","doi":"10.1007/s11144-024-02693-z","DOIUrl":null,"url":null,"abstract":"<p>Dissolution of a Nigerian antigorite-rich dolomite ore in methanesulfonic acid (MSA) solution for its optimal industrial application was investigated. The impact of the acid concentration, reaction temperature, particle diameter as well as reaction time on the rate of the ore dissolution was examined. The magnesium recovery was 97.2% at the optimal conditions: 2.5 mol/L MSA, solid/liquid 10 g/L, 56 µm in 2 h, and reaction temperature of 75 ºC<b>.</b> According to the shrinking core model, test results indicated that mass diffusion was the controlling step of the overall reaction kinetics. The activation energy of 11.26 kJ mol<sup>−1</sup> gives support to this assertion. The correlation coefficient value of (⁓0.98) indicates that the workability of the proposed kinetic model is highly effective or functional. At optimal conditions, a high-purity MgO product was obtained.</p>","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Optimizing methanesulfonic acid leaching for efficient extraction of magnesia from a Nigerian antigorite-rich dolomite ore\",\"authors\":\"Ayo F. Balogun, Alafara A. Baba\",\"doi\":\"10.1007/s11144-024-02693-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Dissolution of a Nigerian antigorite-rich dolomite ore in methanesulfonic acid (MSA) solution for its optimal industrial application was investigated. The impact of the acid concentration, reaction temperature, particle diameter as well as reaction time on the rate of the ore dissolution was examined. The magnesium recovery was 97.2% at the optimal conditions: 2.5 mol/L MSA, solid/liquid 10 g/L, 56 µm in 2 h, and reaction temperature of 75 ºC<b>.</b> According to the shrinking core model, test results indicated that mass diffusion was the controlling step of the overall reaction kinetics. The activation energy of 11.26 kJ mol<sup>−1</sup> gives support to this assertion. The correlation coefficient value of (⁓0.98) indicates that the workability of the proposed kinetic model is highly effective or functional. At optimal conditions, a high-purity MgO product was obtained.</p>\",\"PeriodicalId\":1,\"journal\":{\"name\":\"Accounts of Chemical Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":16.4000,\"publicationDate\":\"2024-07-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Accounts of Chemical Research\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.1007/s11144-024-02693-z\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1007/s11144-024-02693-z","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Optimizing methanesulfonic acid leaching for efficient extraction of magnesia from a Nigerian antigorite-rich dolomite ore
Dissolution of a Nigerian antigorite-rich dolomite ore in methanesulfonic acid (MSA) solution for its optimal industrial application was investigated. The impact of the acid concentration, reaction temperature, particle diameter as well as reaction time on the rate of the ore dissolution was examined. The magnesium recovery was 97.2% at the optimal conditions: 2.5 mol/L MSA, solid/liquid 10 g/L, 56 µm in 2 h, and reaction temperature of 75 ºC. According to the shrinking core model, test results indicated that mass diffusion was the controlling step of the overall reaction kinetics. The activation energy of 11.26 kJ mol−1 gives support to this assertion. The correlation coefficient value of (⁓0.98) indicates that the workability of the proposed kinetic model is highly effective or functional. At optimal conditions, a high-purity MgO product was obtained.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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