China Magnesium Chloride / 46% Min Flakes, Find details about China Magnesium Chloride, Magnesium from Magnesium Chloride / 46% Min Flakes
Magnesium chloride is the name for the chemical compound with the formula MgCl2 and its various hydrates MgCl2(H2O)x. Anhydrous MgCl2 contains 25.5% elemental magnesium by mass. These salts are typical ionic halides, being highly soluble in water. The hydrated magnesium chloride can be extracted from brine or sea water. In North America, magnesium chloride is produced primarily from Great Salt Lake brine. It is extracted in a similar process from the Dead Sea in the Jordan Valley. Magnesium chloride, as the natural mineral bischofite, is also extracted (by solution mining) out of ancient seabeds, for example, the Zechstein seabed in northwest Europe. Some magnesium chloride is made from solar evaporation of seawater. Anhydrous magnesium chloride is the principal precursor to magnesium metal, which is produced on a large scale. Hydrated magnesium chloride is the form most readily available.
Several hydrates are known with the formula MgCl2(H2O)x, and each loses water at higher temperatures: x = 12 (−16.4 °C), 8 (−3.4 °C), 6 (116.7 °C), 4 (181 °C), 2 (about 300 °C). In the hexahydrate, the Mg2+ is also octahedral, but is coordinated to six water ligands. The thermal dehydration of the hydrates MgCl2(H2O)x (x = 6, 12) does not occur straightforwardly. Anhydrous MgCl2 is produced industrially by heating the chloride salt of hexammine complex [Mg(NH3)6]2+.
As suggested by the existence of some hydrates, anhydrous MgCl2 is a Lewis acid, although a weak one.
In the Dow process, magnesium chloride is regenerated from magnesium hydroxideby acid:
Mg(OH)2(s) + 2 HCl(aq) → MgCl2(aq) + 2 H2O(l)It can also be prepared from magnesium carbonate by a similar reaction.
Derivatives with tetrahedral Mg2+ are less common. Examples include salts of (N(C2H5)4)2MgCl4 and adducts such as MgCl2(TMEDA).
Magnesium chloride is one of many substances used for dust control, soil stabilization, and wind erosion mitigation. When magnesium chloride is applied to roads and bare soil areas, both positive and negative performance issues occur which are related to many application factors.
Ziegler-Natta catalysts, used commercially to produce polyolefins, contain MgCl2 as a catalyst support. The introduction of MgCl2 supports increases the activity of traditional catalysts and allowed the development of highly stereospecific catalysts for the production of polypropylene.
Magnesium chloride is used for low-temperature de-icing of highways, sidewalks, and parking lots. When highways are treacherous due to icy conditions, magnesium chloride helps to prevent the ice bond to the pavement, allowing snow plows to clear the roads more efficiently.
Magnesium chloride is used in three ways for pavement ice control: Anti-icing, when maintenance professionals spread it onto roads before a snow storm to prevent snow from sticking and ice from forming; prewetting, which means a liquid formulation of magnesium chloride is sprayed directly onto salt as it is being spread onto roadway pavement, wetting the salt so that it sticks to the road; and pretreating, when magnesium chloride and salt are mixed together before they are loaded onto trucks and spread onto paved roads. Calcium chloride damages concrete twice as fast as magnesium chloride. It should be noticed that the amount of magnesium chloride is supposed to be controlled when it is used for de-icing as it may cause pollution to the environment.
Nutrition and medicine
Magnesium chloride is used in nutraceutical and pharmaceutical preparations.
Magnesium chloride (E511) is an important coagulant used in the preparation of tofu from soy milk.
In Japan it is sold as nigari ( derived from the Japanese word for "bitter"), a white powder produced from seawater after the sodium chloride has been removed, and the water evaporated. In China, it is called lushui .
Nigari or Iushui is, in fact, natural magnesium chloride, meaning that it is not completely refined (it contains up to 5% magnesium sulfate and various minerals). The crystals originate from lakes in the Chinese province of Qinghai, to be then reworked in Japan. Millions of years ago, this region was home to an ancient ocean that gradually dried up and of which only salty lakes with brackish water saturated with salt where magnesium chloride crystallizes remain today.
It is an inexpensive dietary supplement providing magnesium, hence its interest in view of a general deficit in our current consumption (to be in full health, the human body must in particular benefit from a balance between calcium and magnesium). It is also an ingredient in baby formula milk.
1. Q: Can I get some free samples?
A: Of course, we will send a sample to you.
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3. Q: What's the payment term?
A: Usually we accept T/T, we also can accept L/C, etc.
4. Q: Will you be responsible for the goods when shipping?
A: Generally the logistics company we cooperate with can send the cargo to where you want. Besides, we promise that goods will be arranged as soon as possible and delivered in the shortest time.