Cargando…

Alkali fusion using sodium carbonate for extraction of vanadium and tungsten for the preparation of synthetic sodium titanate from spent SCR catalyst

Alkali fusion method to extract vanadium and tungsten from spent SCR catalyst and to simultaneously prepare synthetic sodium titanate for the purpose of preparation of feedstock for TiO(2) manufacturing by hydrometallurgical processing was investigated. Based on the Na(2)O-TiO(2) phase diagram and e...

Descripción completa

Detalles Bibliográficos
Autores principales: Choi, In-Hyeok, Moon, Gyeonghye, Lee, Jin-Young, Jyothi, Rajesh Kumar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6707245/
https://www.ncbi.nlm.nih.gov/pubmed/31444396
http://dx.doi.org/10.1038/s41598-019-48767-0
_version_ 1783445830023249920
author Choi, In-Hyeok
Moon, Gyeonghye
Lee, Jin-Young
Jyothi, Rajesh Kumar
author_facet Choi, In-Hyeok
Moon, Gyeonghye
Lee, Jin-Young
Jyothi, Rajesh Kumar
author_sort Choi, In-Hyeok
collection PubMed
description Alkali fusion method to extract vanadium and tungsten from spent SCR catalyst and to simultaneously prepare synthetic sodium titanate for the purpose of preparation of feedstock for TiO(2) manufacturing by hydrometallurgical processing was investigated. Based on the Na(2)O-TiO(2) phase diagram and experimentally obtained results, appropriate alkali-fusion temperature and molar ratio (MO(x)/Na(2)O + MO(x)) were determined to prepare soluble vanadium, tungsten salts, and sodium titanate. As results, the extraction efficiency of vanadium and tungsten was >99% and sodium titanate as feedstock for making TiO(2) was obtained under the following alkali fusion conditions: Temperature, 950 °C; reaction time, 20 min; molar ratio, 0.5. When the molar ratio (MO(x)/Na(2)O + MO(x)) was less than 0.5, complete liquidized product (eutectic melt of the feedstock and Na(2)CO(3)) was obtained at the given conditions. This method, compared to conventional alkali roasting, is advantageous for rapid synthesis of water-soluble compounds for leaching of vanadium and tungsten, and for use as feedstock for the preparation of TiO(2) by hydrometallurgical route.
format Online
Article
Text
id pubmed-6707245
institution National Center for Biotechnology Information
language English
publishDate 2019
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-67072452019-09-08 Alkali fusion using sodium carbonate for extraction of vanadium and tungsten for the preparation of synthetic sodium titanate from spent SCR catalyst Choi, In-Hyeok Moon, Gyeonghye Lee, Jin-Young Jyothi, Rajesh Kumar Sci Rep Article Alkali fusion method to extract vanadium and tungsten from spent SCR catalyst and to simultaneously prepare synthetic sodium titanate for the purpose of preparation of feedstock for TiO(2) manufacturing by hydrometallurgical processing was investigated. Based on the Na(2)O-TiO(2) phase diagram and experimentally obtained results, appropriate alkali-fusion temperature and molar ratio (MO(x)/Na(2)O + MO(x)) were determined to prepare soluble vanadium, tungsten salts, and sodium titanate. As results, the extraction efficiency of vanadium and tungsten was >99% and sodium titanate as feedstock for making TiO(2) was obtained under the following alkali fusion conditions: Temperature, 950 °C; reaction time, 20 min; molar ratio, 0.5. When the molar ratio (MO(x)/Na(2)O + MO(x)) was less than 0.5, complete liquidized product (eutectic melt of the feedstock and Na(2)CO(3)) was obtained at the given conditions. This method, compared to conventional alkali roasting, is advantageous for rapid synthesis of water-soluble compounds for leaching of vanadium and tungsten, and for use as feedstock for the preparation of TiO(2) by hydrometallurgical route. Nature Publishing Group UK 2019-08-23 /pmc/articles/PMC6707245/ /pubmed/31444396 http://dx.doi.org/10.1038/s41598-019-48767-0 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Choi, In-Hyeok
Moon, Gyeonghye
Lee, Jin-Young
Jyothi, Rajesh Kumar
Alkali fusion using sodium carbonate for extraction of vanadium and tungsten for the preparation of synthetic sodium titanate from spent SCR catalyst
title Alkali fusion using sodium carbonate for extraction of vanadium and tungsten for the preparation of synthetic sodium titanate from spent SCR catalyst
title_full Alkali fusion using sodium carbonate for extraction of vanadium and tungsten for the preparation of synthetic sodium titanate from spent SCR catalyst
title_fullStr Alkali fusion using sodium carbonate for extraction of vanadium and tungsten for the preparation of synthetic sodium titanate from spent SCR catalyst
title_full_unstemmed Alkali fusion using sodium carbonate for extraction of vanadium and tungsten for the preparation of synthetic sodium titanate from spent SCR catalyst
title_short Alkali fusion using sodium carbonate for extraction of vanadium and tungsten for the preparation of synthetic sodium titanate from spent SCR catalyst
title_sort alkali fusion using sodium carbonate for extraction of vanadium and tungsten for the preparation of synthetic sodium titanate from spent scr catalyst
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6707245/
https://www.ncbi.nlm.nih.gov/pubmed/31444396
http://dx.doi.org/10.1038/s41598-019-48767-0
work_keys_str_mv AT choiinhyeok alkalifusionusingsodiumcarbonateforextractionofvanadiumandtungstenforthepreparationofsyntheticsodiumtitanatefromspentscrcatalyst
AT moongyeonghye alkalifusionusingsodiumcarbonateforextractionofvanadiumandtungstenforthepreparationofsyntheticsodiumtitanatefromspentscrcatalyst
AT leejinyoung alkalifusionusingsodiumcarbonateforextractionofvanadiumandtungstenforthepreparationofsyntheticsodiumtitanatefromspentscrcatalyst
AT jyothirajeshkumar alkalifusionusingsodiumcarbonateforextractionofvanadiumandtungstenforthepreparationofsyntheticsodiumtitanatefromspentscrcatalyst