Production of ‘Active’ Magnesium Oxide by heating in Vacuum

Nature ◽  
1961 ◽  
Vol 192 (4803) ◽  
pp. 653-654 ◽  
Author(s):  
R. VALVERDE ◽  
J. P. SÁENZ
Keyword(s):  
Magnesium Oxide ◽  
Active Magnesium Oxide

Optimization and mechanism in preparing active magnesium oxide from magnesite

2017 ◽  
Vol 129 (2) ◽  
pp. 1103-1109 ◽  
Author(s):  
Limei Bai ◽  
Yuxin Ma ◽  
Wenqing Zhao ◽  
Yufen Deng ◽  
Shaoying Li
Keyword(s):  
Magnesium Oxide ◽  
Active Magnesium Oxide

Preparation of active magnesium oxide with caustic calcined magnesia by ammonia circulation method

2016 ◽  
Vol 27 (4) ◽  
pp. 1109-1114 ◽  
Author(s):  
Xue Li ◽  
Ying Zhang ◽  
Yan Zhang ◽  
Ze Jin ◽  
Peng Chang ◽  
...  
Keyword(s):  
Magnesium Oxide ◽  
Circulation Method ◽  
Active Magnesium Oxide

scholarly journals The Interaction of Water Suspension Incarbonic Dolomite with Sulfuric Acid and Carbon Dioxide

2016 ◽  
Vol 17 (1) ◽  
pp. 76-80
Author(s):  
O.M. Duda ◽  
I.J. Kostiv
Keyword(s):  
Carbon Dioxide ◽  
Magnesium Oxide ◽  
Calcium Oxide ◽  
Aqueous Suspension ◽  
Inert Material ◽  
Calcium Compound ◽  
Different Temperatures ◽  
Active Calcium ◽  
Soluble Calcium ◽  
Active Magnesium Oxide

The interaction of aqueous suspension of calcium chloride has been studied at different temperatures and at the duration of natural dolomite and solutions of sulfate acid and also carbon dioxide. Studied composition of formed products. Established that the reaction rate of magnesium oxide with acid or carbon dioxide is lower than calcium oxide. The conditions of obtaining of active magnesium with content ballast calcium carbonate and sulfate, which is connected to soluble calcium. For 1023 K temperature forms the most active magnesium oxide, increasing it to 1123 K, magnesium oxide is passivated and increasing the number of active calcium oxide. Soluble calcium compound completely pass into insoluble sulfates or carbonates by passing through a suspension of carbon dioxide or solution of sulfate acid neutralization. Thermo activated dolomite which containing active magnesium oxide and various forms of inert material can be used for obtaining magnesia binders.

Compounding Bromobutyl for Heat Resistance

1979 ◽  
Vol 52 (2) ◽  
pp. 319-330 ◽  
Author(s):  
J. Timar ◽  
W. S. Edwards
Keyword(s):  
Zinc Oxide ◽  
Heat Resistance ◽  
Magnesium Oxide ◽  
Heat Resistant ◽  
Active Magnesium Oxide

Abstract Bromobutyl rubber is a good candidate for heat resistant applications, particularly when cured with zinc oxide in conjunction with sulphur donors or with dithiocarbamates plus active magnesium oxide. Several antioxidants provide added protection. When suitably compounded, bromobutyl compares well with resin-cured regular butyl in heat resistance and is much faster curing.

Sorption from solution by active magnesium oxide

1948 ◽  
Vol 3 (4) ◽  
pp. 303-311 ◽  
Author(s):  
James W McBain ◽  
Robert C Dunn
Keyword(s):  
Magnesium Oxide ◽  
Active Magnesium Oxide

Study on Active Magnesium Oxide Adsorption Properties of Sr (II) in Aqueous Solution

2017 ◽  
Author(s):  
Qin Qifeng ◽  
Li Xiaoyan
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Magnesium Oxide ◽  
Contact Time ◽  
Removal Rate ◽  
Precipitation Method ◽  
Solution Temperature ◽  
Isothermal Model ◽  
Active Magnesium Oxide ◽  
Solid Liquid

The active magnesium oxide (AMO) was synthesized by homogeneous precipitation method with microwave and characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and infrared spectroscopy (FTIR). Adsorption of Sr(II) by AMO was investigated under the effect of AMO dosages, pH of solution, temperature and contact time and analyzed the kinetics and thermodynamics characteristics. The results showed that AMO has very good adsorption capacity on Sr(II) in aqueous solution,When pH of solution is 8.0, the solid-liquid ratio is 0.25 g·L−1, initial Sr(II) concentration is 50mg·L−1, the contact time is 80 min at 298K, the removal rate and adsorption capacity reached 98.29% and 187.5 mg·g−1, respectively. Kinetic and thermodynamic results indicate that adsorption behavior of Sr(II) by AMO fitted well with pseudo-second-order model and the Freundlich isothermal model. Adsorption thermodynamic parameters showed that the process of adsorption is spontaneous and endothermic.

Observations of the Thermal Decomposition of Brucite

1968 ◽  
Vol 26 ◽  
pp. 446-447
Author(s):  
P. L. Burnett ◽  
W. R. Mitchell ◽  
C. L. Houck
Keyword(s):  
Thermal Decomposition ◽  
Magnesium Oxide ◽  
Basal Plane ◽  
Magnesium Ions ◽  
A Value ◽  
Reaction Proceeds

Natural Brucite (Mg(OH)2) decomposes on heating to form magnesium oxide (MgO) having its cubic ﹛110﹜ and ﹛111﹜ planes respectively parallel to the prism and basal planes of the hexagonal brucite lattice. Although the crystal-lographic relation between the parent brucite crystal and the resulting mag-nesium oxide crystallites is well known, the exact mechanism by which the reaction proceeds is still a matter of controversy. Goodman described the decomposition as an initial shrinkage in the brucite basal plane allowing magnesium ions to shift their original sites to the required magnesium oxide positions followed by a collapse of the planes along the original <0001> direction of the brucite crystal. He noted that the (110) diffraction spots of brucite immediately shifted to the positions required for the (220) reflections of magnesium oxide. Gordon observed separate diffraction spots for the (110) brucite and (220) magnesium oxide planes. The positions of the (110) and (100) brucite never changed but only diminished in intensity while the (220) planes of magnesium shifted from a value larger than the listed ASTM d spacing to the predicted value as the decomposition progressed.

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