A. G. Artemenkov, L. G. Gerasimova, A. I. Nikolaev, Yu. G. Bychenya, E. S. Shchukina, E. V. Kuznetsova
{"title":"Nitric Acid Processing of Perovskite Concentrate under Atmospheric and Autoclave Conditions","authors":"A. G. Artemenkov, L. G. Gerasimova, A. I. Nikolaev, Yu. G. Bychenya, E. S. Shchukina, E. V. Kuznetsova","doi":"10.1134/S0040579524700623","DOIUrl":null,"url":null,"abstract":"<div><p>The interaction of perovskite concentrate with nitric acid under atmospheric conditions and at an excess pressure was studied. High efficiency was achieved in the separation of components in the form of a solid phase (hydrated precipitate of titanium and rare metals) and a liquid phase containing calcium, rare-earth metals, and thorium. It was shown that the conditions of the acid treatment of the resulting precursors determine their structure and composition, which, in turn, determine the directions of their further processing to obtain final products. In particular, it was established that an increased pressure in the reaction zone causes rutilization of the hydrated precipitate, and therefore its further processing to produce titanium dioxide and rare metals should be carried out by chlorination.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"379 - 385"},"PeriodicalIF":0.7000,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Theoretical Foundations of Chemical Engineering","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S0040579524700623","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The interaction of perovskite concentrate with nitric acid under atmospheric conditions and at an excess pressure was studied. High efficiency was achieved in the separation of components in the form of a solid phase (hydrated precipitate of titanium and rare metals) and a liquid phase containing calcium, rare-earth metals, and thorium. It was shown that the conditions of the acid treatment of the resulting precursors determine their structure and composition, which, in turn, determine the directions of their further processing to obtain final products. In particular, it was established that an increased pressure in the reaction zone causes rutilization of the hydrated precipitate, and therefore its further processing to produce titanium dioxide and rare metals should be carried out by chlorination.
期刊介绍：
Theoretical Foundations of Chemical Engineering is a comprehensive journal covering all aspects of theoretical and applied research in chemical engineering, including transport phenomena; surface phenomena; processes of mixture separation; theory and methods of chemical reactor design; combined processes and multifunctional reactors; hydromechanic, thermal, diffusion, and chemical processes and apparatus, membrane processes and reactors; biotechnology; dispersed systems; nanotechnologies; process intensification; information modeling and analysis; energy- and resource-saving processes; environmentally clean processes and technologies.
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