从石煤酸浸液中萃取钒的工艺研究

摘要

The technological process of extracting V2O5 from t he stone coal acid-leaching solution wi th TOA is reseached in this paper. Some parameters of extraction and anti -extraction, such as pH, organic phase to aguo-phase (O/A), the composition of org anic phase and the setting time, are optimized by a series of tests , and the results show that the best pH is between 2.0～3.0 under the condition. Not only the extraction rate can be up to 98%, but also the anti-extraction is easy. When 0.5 M Na2CO3 is taken as the anti-extraction solvent, the yield will e xceed 99.9 %. By way of extraction, the concentration of V2O5 can be raised from 2～6 g/ L to 50 g/L or more, and the major impurities are removed. These will be of advan tage to precipitation.%研究了三正辛胺从石煤酸浸液中萃取钒的工艺过程，从萃取和反萃的 pH值、相比、有机相组成、澄清时间等方面进行了详细试验。研究表明：用三正辛胺萃取 钒 时，其萃取率可达98%以上；而且易反萃，用0.5 M Na2CO3反萃时，反萃率为99.9%。经 萃取后，浸出液中的钒可由每升几克富集到每升数十克以上，有利于后续的提钒工艺。