Magnesium sulfate hydrate

Table 24. Physical Properties of Magnesium Sulfates and Magnesium Sulfate Hydrates ...

Copper magnesium sulfate hydrate Diaryls from diazonium salts s. 29, 279... 

The medium for the production of variotin, contained 3.0% sucrose, 0.2% dipotassium phosphate, 0.05% potassium chloride, 0.05% magnesium sulfate (hydrated), 0.001 % ferrous sulfate (hydrated), and 0.3 % sodium nitrate. Inorganic nitrogen sources were found to be more suitable for variotin production than organic nitrogen sources. Ammonium nitrate or ammonium sulfate could also be used. Of 11 sugars tested, sucrose was the most suitable carbon source for variotin formation (Takeuchi et al., 1959). The production of variotin reached a maximum by 4 or 5 days at 25 in shaken culture, or by 90 hours at 25 by aerated tank fermentation. 

Mineral hydrates, such as alumina trihydrate and magnesium sulfate heptahydrate, are used in highly filled thermoset resins. 

Magnesium sulfate [7487-88-9] MgSO, is found widely in nature as either a double salt or as a hydrate. The more important mineral forms are Hsted in Table 23. 

A mixture of 3.4 parts of 7-chloro-4-fluorobutyrophenone, 4 parts of 1-(4-piperidyl)-2-benzimidazolinone hydrochloride, 6 parts of sodium carbonate and 0.1 part of potassium iodide in 176 parts of 4-methyl-2-pentanone is stirred and refluxed for 48 hours. The reaction mixture is cooled and 120 parts of water is added. The separated organic layer is dried over magnesium sulfate and the solvent is evaporated to leave an oily residue which is dissolved in dilute hydrochloric acid and boiled. The acidic solution is filtered and cooled at room temperature whereupon there crystallizes from solution l-<1-[ y-(4-fluorobenzoyl)-propyl]-4-piperidvl>-2-benzimidazolinone hydrochloride hydrate melting at about 134°-142°C. 

Mngnesium Hydrate. Magnesium Nitrate.. Magnesiuni I hnaphata. Magnesium Sulfate. . ... 

Epsom salts are hydrates of magnesium sulfate. The formula for Epsom salts is MgS04 - 7H20. A 7.834-g sample is heated until a constant mass is obtained indicating that all foe water has been evaporated off. What is foe mass of foe anhydrous magnesium sulfate What percentage of foe hydrate is water ... 

The experiment often uses hydrates of copper(II) sulfate, magnesium sulfate, calcium sulfate, or barium chloride. 

Recently, the influence of the preparation method of various MgO samples on their catalytic activity in the MPV reaction of cyclohexanone with 2-propanol has been reported 202). The oxides were prepared by various synthetic procedures including calcination of commercially available magnesium hydroxide and magnesium carbonate calcination of magnesium hydroxides obtained from magnesium nitrate and magnesium sulfate sol-gel synthesis and precipitation by decomposition of urea. It was concluded that the efficiency of the catalytic hydrogen transfer process was directly related to the number of basic sites in the solid. Thus, the MgO (MgO-2 sample in Table IV) prepared by hydration and subsequent calcination of a MgO sample that had been obtained from commercially available Mg(OH)2 was the most basic and the most active for the MPV process, and the MgO samples with similar populations of basic sites exhibited similar activities (Table IV). 

Magnesium sulfate is found in nature in many salt deposits and mineral waters, occurring as hydrates or double salts. The heptahydrate or Epsom salt... 

Hydrated magnesium sulfate occurs in nature as the minerals kieserite and epsomite. The salt is mined in large scale from these and other naturally occurring minerals. The salt also is prepared in the laboratory by the action of sulfuric acid on magnesium oxide, hydroxide, or carbonate followed by evaporation and crystallization ... 

Magnesium sulfate forms several double salts having varying stoichiometric compositions. When gaseous ammonia is bubbled through magnesium sulfate solution, several hydrated double salts are obtained by crystallization. 

Before you start figuring from the equation above, check the chart on page 108, top right. Here you will discover that each molecule of magnesium sulfate has seven molecules of water of hydration(7H,0) attached to it. and each sodium carbonate molecule, (CONTINUED ON PAGE 108)... 

A mixture of 493 g. (2.00 moles) of magnesium sulfate hepta-hydrate and 700 ml. of tap water is stirred for 5 minutes and filtered into a 2-1. three-necked flask equipped with a mechanical stirrer and an alcohol thermometer that dips into the solution. The flask is immersed in a cooling bath (Note 1), the stirrer is started, and the solution is cooled to 10°. To the solution is added, in one portion, 143 g. (2.20 moles) of potassium cyanide Caution Toxic), and the stirring is continued for 45 minutes at 8-12° (Note 2). The solution is maintained at this temperature while 102 g. (1.10 moles) of epichlorohydrin (Note 3) is added dropwise with stirring over a period of 1 hour (Note 4). The mixture is allowed to come to room temperature and is stirred for an additional 24 hours at this temperature. 

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