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PURAL MG 70
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Producer: 
Sasol
Brand: 
PURAL
PURAL MG 70 is aluminum magensium hydroxy carbonate. It has a 70:30 MgO:Al2O3 ratio. Hydrotalcites have a double-layered metal hydroxide structure consisting of magnesium and aluminium hydroxide octahedrons interconnected via the edges. Additional interstitial anions between the layers compensate the charge of the crystal and determine the size of the interlayer distance (basal spacing).

PURAL MG 70

Producer: 
Sasol
Brand: 
PURAL
PURAL MG 70 is aluminum magensium hydroxy carbonate. It has a 70:30 MgO:Al2O3 ratio. Hydrotalcites have a double-layered metal hydroxide structure consisting of magnesium and aluminium hydroxide octahedrons interconnected via the edges. Additional interstitial anions between the layers compensate the charge of the crystal and determine the size of the interlayer distance (basal spacing).
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Identification & Functionality

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Product Background

The collected and refined know-how to produce alumina hydrates via the sol-gel technique is used by Sasol to prepare other inorganic oxides or mixed oxides. The properties of these inorganic specialty materials are leading Sasol into new, interesting fields of research and application. One of these specialties is the hydrotalcite family (aluminium-magnesium compounds) which is obtained by hydrolysis of mixed alcoholates. Compared to alumina hydrates, hydrotalcites are even more alkaline in nature. Basicity is adjustable by increasing the Mg/Al ratio and/or incorporating anions other than OH-. Hydrotalcites have a double-layered metal hydroxide structure. The layers consist of magnesium and aluminium hydroxide octahedra sharing edges. Additional interstitial anions between the layers compensate the charge of the crystal and determine the size of the interlayer distance (basal spacing). While hydrotalcites are accessible through the corresponding metal salts, the metal alcoholate route, patented by Sasol, has advantages over other synthesis routes. Most important is that the Al/Mg ratio can be varied over a wide range. In addition, it is now possible to obtain hydrotalcites with a purity and a controlled anion content that have to date been unavailable.

Properties

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Chemical Properties
ValueUnitsTest Method / Conditions
Magnesium Oxide : Aluminium Oxide Content70 : 30%
L.O.I.max. 45%
Carbon Content0.5 - 3%
Silicon Dioxide Contentmax. 350ppm
Ferric Oxide Contentmax. 200ppm
Na, Ca, Ti eachmax. 50ppm
Physical Properties
ValueUnitsTest Method / Conditions
Surface Areamin. 180m2/g
Pore Volumemin. 0.2ml/g
Loose Bulk Density350 - 550g/l
Particle Size Distribution (< 25 μm)min. 30%
Particle Size Distribution (< 45 μm)min. 50%
Particle Size Distribution (< 90 μm)min. 90%

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Regional Availability

Documents (1)

Name
Type
PURAL MG Series Technical Data Sheet
Technical Data Sheet