公开(公告)号：US3859427A

公开(公告)日：1975-01-07

申请号：US19562271

申请日：1971-11-04

Applicant: ALUMINUM CO OF AMERICA

Inventor： FRANCIS THOMAS L ,  MACZURA GEORGE

IPC: C01F7/02 ,  C04B35/113 ,  C01F7/04 ,  C01F7/16

CPC classification number: C04B35/113 ,  C01F7/028 ,  C01P2004/61 ,  C01P2004/62

Abstract: Production of high-purity beta alumina by reacting a critical combination of alumina hydrate or calcined alumina or a mixture of these two, a source of oxide other than aluminum oxide, and a source of fluoride.