Preparation of anhydrous magnesium chloride from ammonium magnesium chloride hexahydrate

Purification strategy and effect of impurities on corrosivity of dehydrated carnallite for thermal solar applications

“…Hydrolysis of anhydrous MgCl 2 or MgCl 2 ·2H 2 O to form MgOHCl can occur in the temperature range of 210–445 °C. 8,10 Our measured MgOHCl content indeed shows two increases at the isothermal temperature of 240 °C and 400 °C, which suggest that some MgCl 2 molecules in DC salt are in the form of MgCl 2 ·2H 2 O and MgCl 2 ·H 2 O because 240 °C and 400 °C are the corresponding dehydration temperatures, respectively. The variation among non-treated DC at 117 °C and 180 °C may be attributed to inherent inconsistency of salt samples considering the magnitude of the available error bars.…”

Indirect electrosynthesis of ammonia from nitrogen and water by a magnesium chloride cycle at atmospheric pressure

“…29 We are engaged in relieving this stress by distributing the tasks into separated N 2 fixation and hydrogenation, and Figure 1B displays the thermodynamic analysis of each step in the MCC process, including Reactions 1, 2, 3, 4, and 5, where the thermodynamic data were calculated using HSC version 6.0, It can be seen that among all of these steps, only Reaction 1 is nonspontaneous, which can be achieved by the mature industrial process-in other words, electrolysis of MgCl 2 in molten chlorides. 30,31 The cathodic Mg is then used to fixate N 2 into Mg 3 N 2 (Reaction 2), which is known to be kinetically feasible. Reaction 3 is the reverse Deacon reaction.…”

“…The electrolysis requires anhydrous MgCl 2 , but the natural MgCl 2 comes from seawater, whose dehydration is rather difficult and accounts for $50% of the total energy consumption for Mg production. 30,31 A huge amount of energy will be saved if anhydrous MgCl 2 can be directly regenerated. Therefore, the goal is to find a dry process, and to do so, we checked the gas-solid reaction between HCl and Mg 3 N 2 (Reaction 7).…”

Release characteristics of chloride during single droplet drying process of desulfurization wastewater

“…At the stage of crystallization chloride salt hydrolysis (43-300 s), since the release of HCl in the previous stage consumed most of the H + and the moisture was mostly evaporated, HCl during this stage was mainly generated by the dissolution of crystallization chloride salts in their own crystal water for hydrolysis. The reaction equations are depicted in Eqns ( 7)-( 11): [27][28][29] CaCl…”