Ammonium carnallite was synthesized by hydrated magnesium chloride in salt lake and ammonium chloride solution. Dehydrated ammonium carnallite was dissolved in methanol under low temperature by feeding ammonia, to pre...Ammonium carnallite was synthesized by hydrated magnesium chloride in salt lake and ammonium chloride solution. Dehydrated ammonium carnallite was dissolved in methanol under low temperature by feeding ammonia, to prepare anhydrous magnesium chloride. The results show that anhydrous magnesium chloride contains magnesium oxide in an amount less than 0.1% by weight, the yield of magnesium chloride was above 99.5%. Ammonium carnallite, ammoniation magnesium chloride and anhydrous magnesium chloride were characterized by thermoanalysis, X-ray powder diffraction and scanning electron microscopy.展开更多
he concentrated MgCl2 -eutectic brine containing borate was stepw1se cooled in stir-ring to 0℃` - 10℃and - 20℃ respectively’ The Salts crystallized out at each temperatare were identified by chemical analysis,ther...he concentrated MgCl2 -eutectic brine containing borate was stepw1se cooled in stir-ring to 0℃` - 10℃and - 20℃ respectively’ The Salts crystallized out at each temperatare were identified by chemical analysis,thermal analysis and x-ray powder diffeaction. The re-sults showed that the highly hydrated Mg-chloride was cyrstallized out at - 20℃ and MgO . 3B2O3. 7H2O will be crystallinzed out when the brine is let from room temperture to -20. 5℃ for different times.展开更多
文摘Ammonium carnallite was synthesized by hydrated magnesium chloride in salt lake and ammonium chloride solution. Dehydrated ammonium carnallite was dissolved in methanol under low temperature by feeding ammonia, to prepare anhydrous magnesium chloride. The results show that anhydrous magnesium chloride contains magnesium oxide in an amount less than 0.1% by weight, the yield of magnesium chloride was above 99.5%. Ammonium carnallite, ammoniation magnesium chloride and anhydrous magnesium chloride were characterized by thermoanalysis, X-ray powder diffraction and scanning electron microscopy.
文摘he concentrated MgCl2 -eutectic brine containing borate was stepw1se cooled in stir-ring to 0℃` - 10℃and - 20℃ respectively’ The Salts crystallized out at each temperatare were identified by chemical analysis,thermal analysis and x-ray powder diffeaction. The re-sults showed that the highly hydrated Mg-chloride was cyrstallized out at - 20℃ and MgO . 3B2O3. 7H2O will be crystallinzed out when the brine is let from room temperture to -20. 5℃ for different times.
