公开(公告)号：US20030064019A1

公开(公告)日：2003-04-03

申请号：US10264455

申请日：2002-10-04

Applicant: Curtain University of Technology

Inventor： Dermot Michael O'Hare ,  Andrew Michael Fogg ,  Gordon Michael Parkinson

IPC: C01F007/02

CPC classification number: C01F7/473 ,  C01F7/0606 ,  C01F7/47

Abstract: A process for producing alumina from bauxite is described in which bauxite is treated with an alkali to form a mixture comprising a solution of aluminum-containing ions and alumina trihydrate is precipitated from the solution. The process comprises treatment of the solution before or after the precipitation step with a layered double hydroxide in order to remove impurities from the solution by intercalation into the layers in the double hydroxide. The double hydroxide may contain layers of the formula: nullLiAl2(OH)6nullnull.

Abstract translation: 描述了从铝土矿生产氧化铝的方法，其中铝土矿用碱处理以形成包含含铝离子溶液和三水合氧化铝的混合物从溶液中沉淀出来。 该方法包括用层状双氢氧化物处理沉淀步骤之前或之后的溶液，以便通过嵌入双氢氧化物中的层中从溶液中除去杂质。 双氢氧化物可以含有下式的层：[LiAl 2（OH）6] +。