Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Synthesis and characterisation of basic magnesium carbonate
Thesis (PhD (Chemistry))--University of Pretoria, 2006.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Published: |
University of Pretoria
2013
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613708832735232 |
|---|---|
| access_status_str | Open Access |
| author2 | Strydom, C.A. (Christiena Adriana) |
| author_browse | Strydom, C.A. (Christiena Adriana) |
| author_facet | Strydom, C.A. (Christiena Adriana) |
| collection | Thesis |
| dc_rights_str_mv | © 2002, 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 | Thesis (PhD (Chemistry))--University of Pretoria, 2006. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/28582 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:40:26.848Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| 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:2263/28582 Synthesis and characterisation of basic magnesium carbonate Strydom, C.A. (Christiena Adriana) upetd@ais.up.ac.za Botha, Adele Magnesium carbonate characterisation Magnesium carbonate synthesis UCTD Thesis (PhD (Chemistry))--University of Pretoria, 2006. Hydromagnesite, the most stable of the basic magnesium carbonates, can be obtained by mining or by synthesis. Existing synthetic procedures have certain drawbacks which include, undesirable environmental effluents or high pressure and/or temperature requirements. Due to the lack of information in the literature, the aim of this study was to develop a cost effective procedure for the synthesis of basic magnesium carbonate from Mg(OH)2, not hampered by the above mentioned drawbacks. Following an extensive investigation into various parameters that influenced the final product, a simple procedure, based on sparging CO2 through a slurry of magnesium hydroxide in water until the pH reached 7.5-8.5, was developed. The solid portion of the slurry is dried at 80 or 120°C to deliver an unidentified basic magnesium carbonate and hydromagnesite respectively. The products were characterised by XRD, TG-DTA, surface area determination, SEM and FT-IR. The rehydration characteristics of the products were also investigated. By combining the information obtained by each technique, valuable information could be obtained. The synthesised products were evaluated for flame retardant application, due to the demand of mineral flame retardants which could compete with Mg(OH)2 and AI(OH)3. Compared to the traditionally used halogenated flame retardants, the mineral flame retardants deliver non-toxic, non-corrosive decomposition products and contributes in suppressing the emission of smoke in a fire. Results indicated that the basic magnesium carbonates compared favourably to Mg(OH)2 and AI(OH)3 and presented several advantages in terms of flame retardant applications. Further tests will be necessary to accurately assess the flame retardant effect of the basic magnesium carbonates. The possibilities however seem promising. Chemistry unrestricted 2013-09-07T13:44:55Z 2005-10-11 2013-09-07T13:44:55Z 2002-09-01 2006-10-11 2005-10-10 Thesis Botha, A 2002, Synthesis and characterisation of basic magnesium carbonate, PhD thesis, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/28582 > http://hdl.handle.net/2263/28582 http://upetd.up.ac.za/thesis/available/etd-10102005-101030/ © 2002, 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 application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf University of Pretoria |
| spellingShingle | Magnesium carbonate characterisation Magnesium carbonate synthesis UCTD Synthesis and characterisation of basic magnesium carbonate |
| title | Synthesis and characterisation of basic magnesium carbonate |
| title_full | Synthesis and characterisation of basic magnesium carbonate |
| title_fullStr | Synthesis and characterisation of basic magnesium carbonate |
| title_full_unstemmed | Synthesis and characterisation of basic magnesium carbonate |
| title_short | Synthesis and characterisation of basic magnesium carbonate |
| title_sort | synthesis and characterisation of basic magnesium carbonate |
| topic | Magnesium carbonate characterisation Magnesium carbonate synthesis UCTD |
| url | http://hdl.handle.net/2263/28582 http://upetd.up.ac.za/thesis/available/etd-10102005-101030/ |