Basics
Epsom salt, sulfur bitter, bitter salt, epsomite; over MgSO4 the formula; m.p. 1124 deg.] C; density 2.66 g / mL
magnesium sulfate, or anhydrous magnesium sulfate, the magnesium is a compound of anhydrous magnesium sulfate is a A commonly used chemical reagent and desiccant, but magnesium sulfate often refers to magnesium sulfate heptahydrate, which is a white fine or oblique columnar crystal, odorless and bitter.
Chemical properties: white or colorless needle-like or oblique columnar crystal, odorless, cool and slightly bitter, molecular weight: 246.47, specific gravity 1.68, soluble in water, slightly soluble in ethanol and glycerin, soluble in 67.5 °C Crystal water. Decomposed by heat, 70, 80 °C is the loss of four molecules of crystal water. At 200 °C, all crystal water is lost to an anhydrate. It is easily weathered into powder in air (dry), and gradually removes crystal water into anhydrous magnesium sulfate when heated. This product does not contain any toxic impurities. Magnesium sulfate heptahydrate is easier to weigh than anhydrous magnesium sulfate because it is not easily dissolved, which facilitates quantitative control in the industry.
Classification :
Magnesium sulfate often refers to magnesium sulfate heptahydrate (because it is not easy to dissolve, it is easier to weigh than anhydrous magnesium sulfate, which is convenient for quantitative control in industry.) There are also water, dihydrate, trihydrate and pentahydrate. Anhydrous magnesium sulfate.
Magnesium sulfate heptahydrate has industrial grade and feed grade, granular, according to the size of 0.1-1mm, 1-3mm, 2-4mm three.
Others such as anhydrous, monohydrate, dihydrate, and magnesium sulfate trihydrate are in powder form.
GB: Magnesium sulfate (magnesium sulfate heptahydrate) CAS: 10034-99-8 GB HG/T 2680-2009
Common packaging : 25Kg / bag 50kg / bag
1, anhydrous magnesium sulfate
Anhydrous magnesium sulfate, chemical formula MgSO4, colorless orthorhombic fine crystals. Soluble in water, ethanol, glycerin, not used in acetone. For the pharmaceutical industry and printing, but also for the drying agent, a fertilizer, compound fertilizer, raw materials are magnesium oxide
content: 99%
particle size: particles
over anhydrous magnesium detection index
2, anhydrous magnesium sulfate
as a white powder flowability, density 2.66 /cm3. Soluble in water, slightly soluble in alcohol, insoluble in acetone, because magnesium is one of the main components of chlorophyll, people usually use magnesium sulfate monohydrate as a fertilizer and mineral water additive. The advantage of magnesium sulfate over other fertilizers is relatively high solubility
content: 99%
particle size: particle
uses: fertilizer
testing standards
3, magnesium sulfate dihydrate
index
4, magnesium sulfate trihydrate
use a fertilizer
indicator
5, magnesium sulfate heptahydrate,
magnesium sulfate heptahydrate (formula MgSO4.7H20) and Sulfur, bitter salt, diarrhea salt, Epsom salt, white or colorless needle-like or oblique columnar crystal, odorless, cool and slightly bitter, molecular weight: 246.47, specific gravity 1.68, soluble in water, slightly soluble Ethanol or glycerin is dissolved in its own crystal water at 67.5 °C. Decomposed by heat, 70/80 °C is the loss of four molecules of crystal water. All of the crystal water was lost to an anhydrate at about 200 °C. It is easily weathered into powder in air (dry). When heated, it gradually removes crystal water and turns into anhydrous magnesium sulfate. This product does not contain any toxic substances. Since soda sulfate is not easily decomposed, it is easier to weigh than anhydrous magnesium sulfate, which is convenient for quantitative control in the industry.
Classification: Industrial Grade
: Granular Crystal
Content: 99%
Particle Size: 20 mesh
Shape: 1-3, 2-4, 0.1-1
indicator
Main use of magnesium chloride : mainly used in light industry, chemical industry, printing and dyeing industry, pharmaceutical industry, electroplating industry, smelting industry. Used as fertilizer in agriculture; as a feed additive; used in the manufacture of porcelain, glass, pigments, ABS resin; as a flame retardant for plastics such as acrylate resin in fireproof materials; and as sewage treatment in environmental protection. Magnesium sulfate heptahydrate is used in the light industry for the production of fresh yeast, monosodium glutamate, beverages ; in the chemical industry, it is used in the manufacture of other magnesium salts such as magnesium stearate, magnesium hydrogen phosphate, magnesium oxide, and other sulfates such as potassium sulfate and sodium sulfate; Used as a filler in fireproof materials to enhance heat resistance; in addition, it is used in industrial sewage treatment to condense and set up waste water to meet discharge standards.
Feed grade magnesium
feed grade magnesium as magnesium machining feed supplements, animal body Magnesium is involved in osteoblast during muscle contraction and non-deleted Factor, a variety of enzymes is livestock activators of animal body The material metabolism and nerve function play a major role. If the body is magnesium, it will lead to material metabolism and neurological dysfunction in the livestock, supply disorders, affect growth and even death
.
1 Agricultural application: Magnesium is the core element of chlorophyll. It can strengthen the plant reduction process, improve the resistance, promote the activation of enzymes, make the soil loosened and powerful, promote the development of roots, fully absorb nutrients, and make plants more lush. Sulfur is the main component of proteins and enzymes in plants, promoting root growth. It enhances the metabolism and redox of plants, thereby promoting the growth of crops and increasing yield. Therefore, magnesium sulfate is an ideal raw material for making compound fertilizer. It can be mixed with NPK according to different needs to form compound fertilizer or mixed fertilizer. It can also be mixed with one or more kinds of raw materials into various fertilizers and photosynthetic fertilizers. Actual comparison experiment of nine crops such as rubber tree, tobacco, tea, vegetable, potato, etc. Magnesium-containing compound fertilizer can grow 15-20% of crops than magnesium-free compound fertilizer.
Industrial application: used in the manufacture of zinc antimony powder and other zinc The raw material of salt is also an important auxiliary material for viscose fiber and vinylon fiber. It is also used as wood and leather agent, bone glue clarification and protection agent, and for electroplating flotation.
3 Food application: In the food industry, Shanghai Magnesium Sulfate can be used as lactic acid MSG, etc.
4 Feed application: Magnesium sulphate is a main additive in feed
5 Printing and dyeing application: Magnesium sulphate can be used as dyeing agent for fabric dyeing on printing and dyeing Mordant
6 In industrial wastewater treatment: industrial production produces a lot of sewage, magnesium sulfate can condense and settle the waste liquid sewage.
Preparation process :
1. Sulfuric acid method This method uses dolomite, serpentine and rhododendron as raw materials.
2. Recrystallization The bitter brine obtained in the salt lake is naturally evaporated to a crude magnesium (crude magnesium sulfate). The crude magnesium is used as a raw material, and water is dissolved at 80 to 90 ° C, then clarified at 60 to 70 ° C, cooled at 20 to 25 ° C, centrifuged, and dried to obtain a finished product of industrial magnesium sulfate. The industrial magnesium sulfate was immersed in distilled water, the Ph value was adjusted with sulfuric acid, centrifuged, dried and dehydrated, and recrystallized to obtain magnesium sulfate for medical use.
3. Seawater salt and bitter brine method The seawater salt is bitter brine. After evaporation by halogen method, it produces high temperature salt. The composition is MgSO4 > 30%, NaCI < 35%, MgCl2 is about 7%, KCl is about 0.5. %. The bitter brine can be soaked in 200g/L MgCl2 solution at 48 °C, the NaCl dissolves less, and the MgSO4 dissolves more. After separation, the immersion liquid was cooled to 10 ° C to precipitate crude MgSO 4 · 7H 2 O, and the product was recrystallized twice to obtain a finished product .
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