Properties of MgOHCl

Abstract

From this result, it was concluded that crystalline MgOHCl was successfully produced by the described method.Further work was carried out to determine the purity of MgOHCl produced. The sample was dissolved in 0.1 N HCl (aq). The solution was then titrated against 0.1 N NaOH (aq) for determination of acid consumption. From the volume of acid consumed, the amount of MgOHCl in the sample was determined according to the following reaction:

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

“…The hygroscopic nature of MgCl 2 has been known for a long time in the literature. [1][2][3][4][5][6][7][8][9] Stepwise dehydration of MgCl 2 $6H 2 O to form lower hydrates can be achieved by heating MgCl 2 $6H 2 O to different temperatures as shown by eqn (1a)-(1d However, hydrolysis reactions during dehydration to form MgOHCl and HCl, as shown in eqn (2a) and (2b), occur simultaneously in a similar temperature range (of >240 C) as dehydration: [3][4][5]8,10,11 MgCl 2 $2H 2 O ¼ MgOHCl + HCl(g) + H 2 O (2a)…”

Roles of Additives in the Trihexyl(tetradecyl) Phosphonium Chloride Ionic Liquid Electrolyte for Primary Mg-Air Cells

“…15,16 Notable sharp, intense peaks appear from 3000 to 3400 cm −1 on the Mg surface discharged in the EG-IL system suggesting that the discharge products are more likely to be a complex involving magnesium and ethylene glycol rather than simple Mg(OH) 2 in which the OH group has an IR peak above 3700 cm −1 . 24 The existence of multiple peaks in this range also suggests different OH groups in this compound, which could reflect two different coordination environments for ethylene glycol with the Mg 2+ metal ions, as presented by Miyake. 25 Peaks from 800 to 900 cm −1 (885 cm −1 and 856 cm −1 ) in the surface spectrum are assigned to the CH 2 rocking vibration mode which are indicative of intact ethylene glycol molecules or retained fragments after reaction with Mg. 25,26 The position shift and the intensity change of these two peaks from the liquid electrolyte (883 cm −1 , 860 cm −1 ) compared with the surface spectrum indicate the difference in molecular states of ethylene glycol in the two samples.…”

Mechanically activated solid-state synthesis of hafnium carbide and hafnium nitride nanoparticles

“…For ground powders heated at T IR = 200 • C, the intensity of vibration bands of water has decreased and a peak at 3573 cm −1 , characteristic of OH vibration of hydroxy-type compounds, is observed. A hydrolysis reaction occurs, in our conditions, below 200 • C. The band at 3573 cm −1 cannot be attributed to Mg(OH) 2 as its characteristic OH band is located at 3698 cm −1 [38] and is instead attributed to MgOHCl whose major absorption is reported to take place at 3550 cm −1 [39]. The IR spectrum of poorly crystallized Mg 2 (OH) 3 Cl is reported to exhibit an absorption peak at 3720 cm −1 .…”