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  Pure magnesium chloride is a colorless monoclinic crystal, industrial usually yellowish-brown, bitter salty, hygroscopic, loses 2 crystal water molecules when dissolved in water 100 ℃. At 110 ℃ began to lose part of the hydrogen chloride is decomposed into oxygen chloride intense heat, when rapidly heated to about 118 ℃ decomposition. Their solution is acidic Melting point 118 ° C (decomposition, six water), 712 ℃ (anhydrous).

  The system for metal magnesium, disinfectants, fire extinguishing agents, chilled brine, ceramics, and used to fill fabric, paper and other aspects; curing agent; Nutrition Enhancer; flavor agent (magnesium sulfate, sodium chloride, calcium hydrogen phosphate, calcium sulfate combined); sake yeast and other co-agent; water scavenger (for fish cake, the amount of 0.05% to 0.1%); texturizing agent (combined with poly phosphate, as the elastic surimi products enhancer). Because bitterness is strong, the usual dose is less than 0.1%.

  1. By-product of sea salt brine when, concentrated into carnallite (KCl.MgCI? 6H 2 O) solution, after cooling to remove the potassium chloride and concentrated, filtration, cooling and crystallization derived. Magnesium oxide or magnesium carbonate dissolution with hydrochloric acid, substituted derived. Anhydrous magnesium chloride and ammonium chloride is heated by a deaminase derived

  2. The mixture was dried over anhydrous magnesium chloride and ammonium chloride can be magnesium chloride hexahydrate, ammonium chloride, or by a - double salt of magnesium chloride hexahydrate dehydrated hydrogen chloride flow made. The equimolar MgCl2 • 6H2O and NH4Cl was dissolved in water at a temperature slightly higher than 50 ℃ in aqueous solution to form a double salt crystallizes out, to maintain the original temperature and separated from the mother liquor. Once again recrystallized. A little dried hot into a quartz boat and the boat in a quartz tube dehydration operation leads to a dry hydrogen chloride gas, the temperature was raised to 100 ℃ dehydration 3h, then heated to 250 ℃ 1h, then heated up to 400 ℃ 1h, and finally melted in a short time, and through the CO2 gas to expel HCl gas to give anhydrous magnesium chloride can be stored in a dessicator over phosphorus pentoxide. It can also be a double salt in NH4Cl • MgCl2 • 6H2O vacuum furnace, heated to 200 ℃ dehydrated under reduced pressure, and the amount of hydrogen chloride gas can be reduced. When byproduct salt from seawater brine, dried and concentrated to a carnallite (KCl • MgCl2 • 5H2O) solution, after cooling to remove potassium chloride, concentrated, filtered, cooled, crystallization derived. Magnesium oxide or magnesium carbonate dissolution with hydrochloric acid, substituted derived. Anhydrous magnesium chloride and ammonium chloride is heated by a deaminase derived

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