Extracting agent for extracting nitro T acid from H acid denitration liquid

The invention belongs to the technical field of H acid preparation, and provides an extracting agent for extracting nitro T acid from H acid denitration liquid. The preparation method comprises the following steps: uniformly mixing solvent oil, phenyl ether and diN235, adding a quaternization reagent (benzyl chloride, chlorinated n-butane, n-octane and n-dodecane) while stirring, and reacting at 100-120 DEG C for 2-3 hours. When the extraction agent is used for extracting H acid denitration liquid, compared with the existing common extraction agent, the extraction agent mainly extracts nitronaphthalene sulfonic acid, alkali for reverse extraction is saved by two thirds, and the content of reverse extraction liquid is increased to more than 15%. 本发明属于H酸制备技术领域，提供了一种从H酸脱硝液中萃取硝基T酸的萃取剂。其制备方法包括，将溶剂油、苯基醚、二N235混合均匀后，在搅拌下加入季铵盐化试剂，(氯化苄、氯代正丁烷、正辛烷、正十二烷)于100-120℃，反应2-3小时。制得萃取硝基萘磺酸萃取剂，用该萃取剂萃取H酸脱硝液，跟现在常用的萃取剂相比较，萃取出的主要是硝基萘磺酸，反萃用碱节省三分之二，反萃液含量提高到15％以上。