公开(公告)号：US20140112860A1

公开(公告)日：2014-04-24

申请号：US13922380

申请日：2013-06-20

Applicant: Recytec. Inc. ,  Korea Institute of Science and Technology

Inventor： Hwa Young LEE ,  Joong Kee LEE ,  Jae Gyu JEE ,  Joon Chul CHOI

IPC: C01B19/00

CPC classification number: C01B19/001 ,  C01B19/00 ,  Y02P20/129

Abstract: A method for separating tellurium includes separating and recovering tellurium (Te) from a dissolved solution containing the tellurium using a solvent extraction by an extractant, which contains one selected from a group consisting of tributyl phosphate (TBP), tris(2-ethylhexyl) phosphate (TEHP) and a combination thereof. The method may separate and recover the tellurium as a high-priced metallic element from a material, such as a Bi2Te3-based waste thermoelectric material, which contains not only the tellurium but also other metallic elements, simply and economically using a solvent extraction, whereby the tellurium with high yield and high purity can be separated, recovered and recycled.

Abstract translation: 用于分离碲的方法包括使用萃取剂的溶剂萃取从含有碲的溶解溶液中分离和回收碲（Te），所述萃取剂含有选自磷酸三丁酯（TBP），磷酸三（2-乙基己基）酯 （TEHP）及其组合。 该方法可以从诸如基于Bi2Te3的废热电材料的材料中分离和回收作为高价金属元素的碲，其不仅包含碲而且还包含其它金属元素，简单且经济地使用溶剂萃取，由此 具有高产率和高纯度的碲可以分离，回收和再循环。

公开(公告)号：US20150151966A1

公开(公告)日：2015-06-04

申请号：US14541799

申请日：2014-11-14

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY ,  RECYTEC INC.

Inventor： Hwa Young LEE ,  Joong Kee LEE ,  Jae Gyu JEE ,  Joon Chul CHOI

IPC: C01B19/00 ,  C07C51/42

CPC classification number: C01B19/001 ,  C01B19/005 ,  C07C51/412 ,  C07C51/48 ,  Y02P20/129 ,  C07C55/07

Abstract: The present invention relates to a method of separating tellurium (Te) and selenium (Se) by using a neutral extractant (for example, either one of TBP and TEHP, or in combination thereof) from a dissolved solution of tellurium, such as a waste thermoelectric material. When tellurium and selenium are separated by using the method of this invention from a dissolved solution in which a Bi2Te3-based waste thermoelectric material is dissolved, a recovery rate of 97% or more and a separation factor of 400 or more for tellurium may be achieved, and therefore, tellurium and selenium may be separated in a very effective and economic manner as compared to conventional methods. Further, the present invention is characterized in that environmental pollution issues may be significantly reduced as compared with conventional methods carried out in a strong acidic solution since the present separation and extraction is conducted under a relative weak acid atmosphere in a pH range of 1.0 to 1.5.

Abstract translation: 本发明涉及通过使用中和提取剂（例如，TBP和TEHP中的任一种或其组合）从碲的溶解溶液（例如废物）分离碲（Te）和硒（Se）的方法 热电材料。 当使用本发明的方法从溶解有Bi 2 Te 3的废热电材料的溶解溶液中分离碲和硒时，可以实现97％以上的回收率和碲的分离系数为400以上。 因此，与常规方法相比，碲和硒可以以非常有效和经济的方式分离。 此外，本发明的特征在于，与在强酸性溶液中进行的常规方法相比，可以显着降低环境污染问题，因为在1.0至1.5的pH范围内的相对弱酸性气氛下进行本分离和萃取 。