B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
252/37
B01J 21/04 (2006.01) C01F 7/02 (2006.01)
Patent
CA 1097313
ABSTRACT This invention relates to a method of converting certain aluminas to purer more desirable forms of alumina. More particularly it relates to a method of upgrading the alumina by-product of the Ziegler higher alcohol process. The novel process of this invention for treating a charge alpha alumina monohydrate characterized by high purity, by substantial absence of alkali metal ions, and by presence of titanium as a principal impurity, includes the steps of: (i) calcining said charge alpha alumina monohydrate at temperature of about 800°F-900°F for 1-3 hours thereby forming a calcined charge alumina containing gamma alumina; (ii) mixing said calcined charge alumina containing gamma alumina with about 2-10 times its weight of water thereby forming a wetted alumina; and (iii) heating said wetted alumina at pH of about 6-12.5 to about 190°F-250°F for 8-24 hours thereby forming a heated alumina containing beta alumina trihydrate.
287843
Estes John H.
Koniz Leon F.
Smart & Biggar
Texaco Development Corporation
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