公开(公告)号：US3653937A

公开(公告)日：1972-04-04

申请号：US3653937D

申请日：1969-08-11

Applicant: ALUMINUM CO OF AMERICA

Inventor： KOENIG JAMES J ,  HART LEROY D

IPC: C01F7/02 ,  C09C1/40

CPC classification number: C01F7/02 ,  C01P2004/62 ,  C01P2006/22 ,  C09C1/407

Abstract: Alumina trihydrate of an average particle size of less than about 0.7 micron and a dispersibility in water of at least about 70 percent by weight. The trihydrate is prepared by heating a slurry containing a mix of alumina hydrate of a particle size of less than 0.7 micron and an alkaline solution at 150*-220* F for from 5 to 45 minutes, separating the resulting alumina trihydrate from the slurry, dispersing it with the aid of a dispersing agent, and then drying it.

Abstract translation: 平均粒度小于约0.7微米的氧化铝三水合物和在水中的分散性为至少约70重量％。 通过将含有粒径小于0.7微米的氧化铝水合物和150-220°F的碱性溶液的混合物的浆料加热5至45分钟来制备三水合物，将所得的三水合氧化铝与浆料分离， 在分散剂的帮助下分散，然后干燥。