公开(公告)号：WO2015137823A1

公开(公告)日：2015-09-17

申请号：PCT/NO2015/050049

申请日：2015-03-11

Applicant: NORDIC MINING ASA ,  INSTITUTT FOR ENERGITEKNIKK

Inventor： ARANDA, Asunción ,  MASTIN, Johann

IPC: C01F7/22 ,  C01D7/00 ,  C22B3/10 ,  C22B3/28

CPC classification number: C01F7/22 ,  C01B32/60 ,  C01D7/16 ,  C01D7/26 ,  C01F5/24 ,  C01F7/306 ,  C01F7/56 ,  C01F11/18 ,  C01G49/0009 ,  C01G49/06 ,  Y02P20/142 ,  Y02P20/152

Abstract: A process for alumina and carbonate production from aluminium rich materials with integrated CO 2 utilization, comprising: comminuting and leaching Al-rich materials in concentrated HCI; separating unreacted material from metal chloride solution; separating Al 3+ from solution by crystallization of AlCl 3 ·6H 2 O; calcination of AlCl 3 ·6H 2 O with HCl recovery; precipitation of metal carbonates from CO 2 ; regeneration of HCl and extractive amines; the Al 3+ separation the facilitated by increasing HCl concentration; the calcination being performed in two steps, one in the range 400 and 600°C to generate a HCl-rich gas and one above 600°C to produce Al 2 O 3 ; for precipitating metal carbonates, mixing the metal chloride solution with an organic solution containing a selected amine and contacting the mixture with a CO 2 -containing gas, thereby also extracting HCl by formation of an ammonium chloride salt complex; processing thermally or chemically the organic solution to regenerate the amine for recirculation.

Abstract translation: 一种具有一体化二氧化碳利用的富铝材料生产氧化铝和碳酸盐的方法，包括：将浓缩HCl中的富Al材料粉碎和浸出; 从金属氯化物溶液中分离出未反应的物质; 通过AlCl3·6H2O的结晶从溶液中分离出Al3 +; 用HCl回收煅烧AlCl3·6H2O; 二氧化碳沉淀金属碳酸盐; HCl和萃取胺的再生; 通过增加HCl浓度促进Al3 +分离; 煅烧分两步进行，一个在400和600℃范围内，产生富含HCl的气体，一个高于600℃，生成Al2O3; 用于沉淀金属碳酸盐，将金属氯化物溶液与含有选择的胺的有机溶液混合并将该混合物与含CO 2的气体接触，从而也通过形成氯化铵盐络合物来提取HCl; 加热或化学处理有机溶液以再生胺用于再循环。