Membrane crystallization of magnesium hydroxide
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F18%3AN0000070" target="_blank" >RIV/28676092:_____/18:N0000070 - isvavai.cz</a>
Result on the web
<a href="http://www.czemp.cz/cs/protected-node?destination=node/1795&back=http%253A%252F%252Fwww.czemp.cz%252Fcs&protected_page=1795" target="_blank" >http://www.czemp.cz/cs/protected-node?destination=node/1795&back=http%253A%252F%252Fwww.czemp.cz%252Fcs&protected_page=1795</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Membrane crystallization of magnesium hydroxide
Original language description
Magnesium hydroxide is usually precipitated from brines. In most cases, brine is obtained from desalinating of seawater. However, conventional methods do not often provide high purity of desired product and there are problems with separation of Mg(OH)2. The solution for this problem can be membrane crystallization. There are only few articles published on this topic so far that indicates there are many challenges in investigation of this process. In this work, we focused on exploring the possibilities of membrane crystallization. We mostly used water solutions of MgCl2 and NaOH for experiments. We did several experiments in beaker in order to determine the best conditions for membrane separation (terminal pH 10, temperature 25 °C, concentrations of reactants 0.5 mol l-1 MgCl2 and 0.5 mol l-1 NaOH). Then we used membrane module with hollow fibres, made from heterogeneous anion exchange membrane. For membrane crystallization we used counter-current flow in batch set. When we compared results from beaker experiments and membrane crystallization, there were many differences. Yields of magnesium were higher for beaker reaction, however, in case of membrane crystallization, crystal particles were bigger and had higher purity but the filterability did not improve significantly. SEM pictures of crystals of Mg(OH)2 from beaker reaction showed presence of NaCl impurities.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10406 - Analytical chemistry
Result continuities
Project
<a href="/en/project/LO1418" target="_blank" >LO1418: Progressive development of the Membrane Innovation Centre</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Workshop of Students´ Presentations 2018
ISBN
978-80-906831-3-6
ISSN
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e-ISSN
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Number of pages
11
Pages from-to
41-41
Publisher name
Czech Membrane Platform
Place of publication
Česká Lípa
Event location
Česká Lípa
Event date
Oct 24, 2018
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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