Process for production of transition alumina
AssigneeSumitomo Chemical Company, Limited
InventorsOsamu Yamanishi, Seiichi Hamano
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Abstract
There is provided a process for the production of a transition alumina by thermally decomposing an aluminum sulfate wherein the thermal decomposition is carried out under an atmosphere comprising a reducing substance, and the transition alumina produced by the process has a specific BET surface are of not smaller than 400 m.sup.2 /g.
Claims2
A process for the production of a transition alumina having a BET specific surface area of greater than 400 m.sup.2 /gram, comprising thermally decomposing an aluminum sulfate under an atmosphere comprising a reducing substance selected from the group consisting of hydrogen, ammonia, propane and a propane mixture, in an amount sufficient to reduce the aluminum sulfate to said transition alumina at a temperature of about 500.degree. C. to about 700.degree. C. and for a period of 0.5 seconds to about 15 hours.
A process for the production of a transition alumina having a BET specific surface area of greater than 400 m.sup.2 /gram, comprising thermally decomposing an aluminum sulfate wherein the aluminum sulfate is thermally decomposed under an atmosphere comprising a reducing substance selected from the group consisting of hydrogen, ammonia, propane and a propane mixture, in an amount sufficient to reduce the aluminum sulfate to said transition alumina at a temperature of about 200.degree. C. to about 700.degree. C. and for a period of 0.1 seconds to 24 hours.
Dependencies are inferred from the claim text.