Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Lithium extraction from Zimbabwean petalite using ammonium bifluoride
Dissertation (MSc)--University of Pretoria, 2020.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
University of Pretoria
2020
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613478902038528 |
|---|---|
| access_status_str | Open Access |
| author2 | Crouse, Philippus L. |
| author_browse | Crouse, Philippus L. |
| author_facet | Crouse, Philippus L. |
| collection | Thesis |
| dc_rights_str_mv | © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MSc)--University of Pretoria, 2020. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/73321 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:36:45.136Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/73321 Lithium extraction from Zimbabwean petalite using ammonium bifluoride Crouse, Philippus L. titemwepu@gmail.com Lubbe, Salmon Mwepu, Kalenga Tite UCTD Zimbabwean petalite Petalite Lithium Lithium extraction Digestion Leaching Lithium carbonate Bikita minerals Engineering, built environment and information technology theses SDG-07 Engineering, built environment and information technology theses SDG-08 Engineering, built environment and information technology theses SDG-09 Engineering, built environment and information technology theses SDG-12 Dissertation (MSc)--University of Pretoria, 2020. Extraction of Li2CO3 from Zimbabwean petalite, from the Bikita deposit, was studied using ammonium bifluoride (ABF) digestion at temperatures ranging from room temperature to 600 oC, and gram quantities of ore. ABF digestion bypasses the conventional high-temperature conversion of the mineral to β-spodumene before acid roasting. The process reaction takes place at surprisingly low temperatures—even at room temperature with slurry formation due to the release of water. Below the melting point of ABF, the main products are LiF, AlF3, K2NaAlF6, and (NH4)2SiF6. (NH4)2SiF6 decomposes readily to form ammonia and gaseous SiF4. At higher temperature the products are cryolithionite (Li3Na3Al2F12) and eucryptite (LiAlSiO4). The fluoride solids are not readily soluble in water, and may be roasted in sulfuric acid at relatively mild conditions for a few tens of minutes, then water leached, with 99 % pure lithium carbonate easily recovered from the aqueous phase. mi2026 Chemical Engineering MSc Unrestricted SDG-07: Affordable and clean energy SDG-08: Decent work and economic growth SDG-09: Industry, innovation and infrastructure SDG-12: Responsible consumption and production 2020-02-17T07:52:12Z 2020-02-17T07:52:12Z 2020-04-08 2020-02-14 Dissertation *Mwepu, KT 2020, Lithium extraction from Zimbabwean petalite, MSc thesis, University of Pretoria, at http://respiratory.up.ac.za/ A2020 http://hdl.handle.net/2263/73321 en © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Zimbabwean petalite Petalite Lithium Lithium extraction Digestion Leaching Lithium carbonate Bikita minerals Engineering, built environment and information technology theses SDG-07 Engineering, built environment and information technology theses SDG-08 Engineering, built environment and information technology theses SDG-09 Engineering, built environment and information technology theses SDG-12 Lithium extraction from Zimbabwean petalite using ammonium bifluoride |
| title | Lithium extraction from Zimbabwean petalite using ammonium bifluoride |
| title_full | Lithium extraction from Zimbabwean petalite using ammonium bifluoride |
| title_fullStr | Lithium extraction from Zimbabwean petalite using ammonium bifluoride |
| title_full_unstemmed | Lithium extraction from Zimbabwean petalite using ammonium bifluoride |
| title_short | Lithium extraction from Zimbabwean petalite using ammonium bifluoride |
| title_sort | lithium extraction from zimbabwean petalite using ammonium bifluoride |
| topic | UCTD Zimbabwean petalite Petalite Lithium Lithium extraction Digestion Leaching Lithium carbonate Bikita minerals Engineering, built environment and information technology theses SDG-07 Engineering, built environment and information technology theses SDG-08 Engineering, built environment and information technology theses SDG-09 Engineering, built environment and information technology theses SDG-12 |
| url | http://hdl.handle.net/2263/73321 |