Physical Properties of Alumina Prepared from Machtesh Ramon Ores | Zendy

Wolberg A. | Zendy; Eger I. | Zendy

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Physical Properties of Alumina Prepared from Machtesh Ramon Ores

Author(s) -

Wolberg A.,

Eger I.

Publication year - 1973

Publication title -

israel journal of chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.908

H-Index - 54

eISSN - 1869-5868

pISSN - 0021-2148

DOI - 10.1002/ijch.197300061

Subject(s) - chemistry , corundum , amorphous solid , impurity , catalysis , pyrolysis , chemical engineering , solvent , extraction (chemistry) , metallurgy , mineralogy , organic chemistry , engineering , materials science

High purity alumina is prepared from local ores, containing about 35% alumina, and from low‐grade, 20%, HCl solution. Iron impurities are removed by solvent extraction, and upon pyrolysis, high grade 60% HCl gas is collected. The amorphous alumina obtained at 350°C is transformed to “transition alumina” at 600°C with an increase in surface area; subsequently at 1000–1100°C, high purity crystalline corundum is obtained. The transition‐ and amorphous alumina seem to have promising qualities for desiccant and catalytic use.

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