Magnesium sulfite

In the dual or double alkaU process, an alkaU salt that is considerably more soluble ia water than limestone is used. The alkaU salt is then regenerated usiag a second alkaU, CaCO. There are several alkaUes used ia the absorber the most common are magnesium sulfite, sodium sulfite, and ammonium sulfite. A typical process usiag magnesium sulfite iSjAbsorption... 

At lower pH, sulfur dioxide is mostly present and, as the pH increases from 4 to 9, the proportion of sulfite ion increases and that of the bisulfite ion decreases. Usually either calcium or magnesium bases are used to control the pH within the acidic range. The pH is dependent upon the relative solubility of the calcium or magnesium sulfite, and upon the excess of sulfur dioxide which is used. Because of the greater solubility of magnesium sulfite, the magnesium-based... 

Several plants have been equipped with processes that use an aqueous slurry of magnesium sulfite and magnesium oxide as the scrubbing material. Sulfur dioxide is absorbed, and a mixture of magnesium sulfite and magnesium sulfate is precipitated. 

A bleed stream from the absorption part of the process is dewatered and dried. The crystals of magnesium sulfite and magnesium sulfate are then calcined solid magnesium oxide is returned to the scrubbing process, and sulfur dioxide which is released with the calcination is then converted into a salable product such as sulfuric acid. 

For the regenerative magnesium oxide scrubbing process, the dominant dissolved species are magnesium sulfite, bisulfite, and sulfate. For this process, chloride and fly ash are removed separately to avoid their accumulation in the main scrubbing loop. For this reason, chloride is not a significant... 

Sohnes, D. and Rieger. A. Solubilities of magnesium sulfite hydrates, J. Chem. Eng. Data, 39(1) 161-162,1994. 

Magnesium Sulfite. MgSOi 6IUO. while, crystalline powder. D 1.725. mp loses 6H20 al 200°C, bp (decomposes), slightly soluble in water, insoluble in alcohol, formed hy action of still urous acid on mugnesium hydroxide. Use Manufacture of paper pulp (as bisulfite). 

The goal of this research was to improve activity coefficient prediction, and hence, equilibrium calculations in flue gas desulfurization (FGD) processes of both low and high ionic strength. A data base and methods were developed to use the local composition model by Chen et al. (MIT/Aspen Technology). The model was used to predict solubilities in various multicomponent systems for gypsum, magnesium sulfite, calcium sulfite, calcium carbonate, and magnesium carbonate SCU vapor pressure over sulfite/ bisulfite solutions and, C02 vapor pressure over car-bonate/bicarbonate solutions. 

The solubility of magnesium sulfite hexahydrate in water with the addition of magnesium sulfate was accurately predicted by the LCM for 0-6 molal (29). The relative saturation of the magnesium sulfite hexhydrate was predicted within 10 percent error at 40 and 50 C, and within 20 percent error at 60 C. 

What is the percent by mass of water in magnesium sulfite hexahydrate, MgS03-6H20 ... 

K3As04 potassium arsenate 13464-36-3 25.00 2 8000 1 2409 MgH606S magnesium sulfite trihydrate 19086-20-5 25.00 2.1200 1... 

K3P04 potassium phosphate 7778-53-2 25.00 2.5640 1 2417 MgH1209S magnesium sulfite hexahydrate 13446-29-2 25.00 1.7200 1... 

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