%0 Journal Article
%T Dual-Purpose Solvay-Dow (Magnesium) Conceptual Process
%A Hussein Abdel-Aal
%A Maha Abdelkreem
%A Khaled Zohdy
%J Open Access Library Journal
%V 3
%N 11
%P 1-5
%@ 2333-9721
%D 2016
%I Open Access Library
%R 10.4236/oalib.1102998
%X <div style="text-align:justify;">
	<span style="line-height:1.5;">The proposed process
basically combines two decades old
processes (Solvay and Dow Magnesium) for the manufacture of soda ash and
magnesium, respectively into a single process that also produces ¡°partially-desalinated¡±
water. It does so by subjecting salt brines first, to ammonia causing two
simultaneous actions: 1) the absorption of ammonia forming what is called
¡°ammoniated brine¡±, and 2) the precipitation of magnesium ions, found in the
brine, as magnesium hydroxide, Mg(OH)</span><sub>2</sub><span style="line-height:1.5;">, which is filtered and separated.
Next, carbon dioxide is introduced through the bulk of ammoniated brine, brine
saturated with ammonia, causing the chemical conversion of both Na<sup> </sup></span><sup> </sup><span style="line-height:1.5;"> and Cl</span><sup>©�</sup><span style="line-height:1.5;"> into NaHCO</span><sub>3</sub><span style="line-height:1.5;"> and NH</span><sub>4</sub><span style="line-height:1.5;">Cl, respectively. Soda ash
(Na</span><sub>2</sub><span style="line-height:1.5;">CO</span><sub>3</sub><span style="line-height:1.5;">) and ammonium chloride (NH</span><sub>4</sub><span style="line-height:1.5;">Cl) come as
products, along with partially desalinated water. This process is identified as
¡°brine desalting¡±,
because of the drastic reduction of the salt content in brine. This part was
experimentally tested before by the author and coworkers. Magnesium</span><span style="line-height:1.5;"> chloride
(MgCl</span><sub>2</sub><span style="line-height:1.5;">) is obtained, next, by reacting ammonium chloride (NH</span><sub>4</sub><span style="line-height:1.5;">Cl) with
Mg(OH)</span><sub>2</sub><span style="line-height:1.5;">. In this double reaction, ammonia will be regenerated and
recycled back to the process: 2NH</span><sub>4</sub><span style="line-height:1.5;">Cl   Mg(OH)</span><sub>2</sub><span style="line-height:1.5;"> ¨¤ Mg(Cl)</span><sub>2</sub><span style="line-height:1.5;"> 2NH</span><sub>3</sub><span style="line-height:1.5;"> 2H</span><sub>2</sub><span style="line-height:1.5;">O. Magnesium chloride is the raw material for making magnesium metal. This
makes an additional economic value to the proposed process. The present
contribution offers this conceptual scheme as an
amalgamation of both Solvay/Dow (Magnesium)
processes.</span> 
</div>
%K Magnesium Chloride
%K Soda Ash
%K Magnesium Metal
%K Ammonium Chlorid
%U http://www.oalib.com/paper/5272773