公开(公告)号：US20150252449A1

公开(公告)日：2015-09-10

申请号：US14430268

申请日：2013-09-29

Applicant: Grirem Advanced Materials Co., Ltd.

Inventor： Liangshi Wang ,  Zhiqi Long ,  Dali Cui ,  Xiaowei Huang ,  Ying Yu ,  Yang Xu ,  Xingliang Feng

IPC: C22B59/00 ,  C22B3/10 ,  C22B1/02

CPC classification number: C22B59/00 ,  C22B1/02 ,  C22B3/10 ,  Y02P10/234

Abstract: A method for comprehensively recovering rare earth elements and fluorine element in a bastnaesite treatment process. The method comprises: oxidation roasting a bastnaesite, and leaching a roasted mixture using a hydrochloric acid, adding a roasting promoter to the bastnaesite during the roasting process; and/or during the leaching process using the hydrochloric acid, adding a catalytic leaching promoter into the mixture, obtaining a rare earth chloride solution containing little cerium element and a cerium-rich residue containing the fluorine element; and separating and recovering rare earth fluorides from the cerium-rich residue.

Abstract translation: 稀土元素和氟元素的综合回收方法。 该方法包括：将焙烧方法进行氧化焙烧，并用盐酸浸出焙烧混合物，并在焙烧过程中向焙烧炉中加入焙烧促进剂; 和/或在使用盐酸的浸出过程中，在混合物中加入催化浸出促进剂，得到含有少量铈元素的稀土氯化物溶液和含有氟元素的富铈残渣; 并从富铈残渣中分离回收稀土氟化物。

公开(公告)号：US20150184027A1

公开(公告)日：2015-07-02

申请号：US14412366

申请日：2013-11-07

Applicant: GRIREM ADVANCED MATERIALS CO., LTD.

Inventor： Xiaowei Huang ,  Ying Yu ,  Zhiqi Long ,  Liangshi Wang ,  Dali Cui ,  Yongke Hou ,  Meisheng Cui

IPC: C09G1/02

CPC classification number: C09G1/02

Abstract: The present invention provides a cerium oxide based composite polishing powder and a preparation method thereof. The polishing powder contains the element magnesium in an amount of 0.005 wt %-5 wt % to magnesium oxide meter. The preparation method includes: (1) uniformly mixing a salt solution containing cerium serving as the main component of the polishing powder; (2) uniformly mixing a precipitating agent of an aqueous magnesium bicarbonate solution with the mixed solution prepared in step (1) to obtain a slurry; (3) aging the slurry prepared in step (2) for 0-48 h while the temperature of the slurry is kept at 30-90 degrees centigrade, and filtering the aged slurry to obtain the precursor powder of the polishing powder; (4) calcinating the precursor powder at 600-1000 degrees centigrade, then dispersing and separating the calcinated precursor powder to obtain the polishing powder. The present invention improves the polishing performance and the suspension performance of polishing powder.

Abstract translation: 本发明提供了一种氧化铈基复合抛光粉及其制备方法。 抛光粉末含有与氧化镁计0.005重量％-5重量％的量的元素镁。 制备方法包括：（1）均匀混合含有作为抛光粉主要成分的铈的盐溶液; （2）将碳酸氢钠水溶液的沉淀剂与步骤（1）中制备的混合溶液均匀混合，得到浆料; （3）将浆料的温度保持在30〜90℃，将步骤（2）中制备的浆料老化0-48小时，过滤老化浆料得到抛光粉末的前体粉末; （4）在600-1000℃煅烧前体粉末，然后分散和分离煅烧的前体粉末以获得抛光粉末。 本发明提高了抛光粉的抛光性能和悬浮性能。