协同萃取锗和镓工艺中反萃取锗的改进研究

IMPROVEMENT OF STRIPPING GERMANIUM FOR SYNERGISTIC EXTRACTION PROCESS OF GERMANIUM AND GALLIUM

本文针对作者早先研究成功的“电锌厂回收铟锗镓新工艺”存在的不足之处即反萃取锗进行了研究.着重研究了一种新的反萃取剂——AN-64,并给出了可供选择采用的两条从反萃液中回收锗的工艺路线.本方法既克服了 HF 反萃法有毒、腐蚀性强、需二次萃取富集且从反萃液回收锗困难以及氨水及反萃取法反萃率低的缺点,同时也保持了 HF 反萃取法反萃率高和氨水反萃取法无毒、腐蚀性小、不需二次富集且从反萃液中回收锗容易的优点,是一种比较成功的反萃取锗的新方法.

A study on stripping Ge in synergistic extraction has been carried out directing at the drawbacks of the new technology for In,Ge Ga recovery in an electrolytic zinc plant in theauthor's previous work.In this paper,emphasis is laid on the new stripping agent-AN-64 and two alternative routes for recovery of Ge from stripping liquid are proposed.Not only can the new method overcome the drawbacks of the HF stripping process,such as toxicity,high corrosivity,difficulty in recovery of Ge from the stripping liquid,the need of enrichment for 2 times and low stripping rate using ammonia as stripping agent,but it can retain the following advantages, such as the high stripping rate in the HF stripping process and non-toxicity,low corrosivity,and easy recovery of Ge from the stripping liquid using ammonia,etc. The second enrichment can also be omitted.Hence,It is a successful new method for stripping Ge.