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| 络合萃取法处理促进剂二苯基硫脲生产废水 |
| Treatment of Accelerator Diphenylthiourea Wastewater by Complexing Extraction Process |
| Received:June 06, 2019 Revised:June 11, 2019 |
| DOI：10.12137/j.issn.2095-5448.2019.11.0641 |
| 中文关键词: 促进剂；络合剂；萃取；二苯基硫脲；废水处理工艺；化学需氧量；苯胺 |
| 英文关键词: accelerator；complexing agent；extraction；diphenylthiourea；wastewater treatment process；chemical oxygen demand；aniline |
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| 中文摘要: |
| 采用络合萃取法处理促进剂二苯基硫脲生产废水。结果表明：用煤油/二（2-乙基己基）磷酸（P2O4）络合剂萃取出废水中的苯胺，废水中的苯胺质量浓度及化学需氧量（COD）大幅降低，当络合剂与废水流速比为1∶1.5、络合剂溶液中的P2O4质量浓度为21.3 g·L-1时，废水COD去除率可达到97%以上，苯胺去除率可达到99.5%以上，且络合剂损耗较小；处理后废水进入水处理系统，萃取出的苯胺经酸洗生成苯胺盐酸盐后用于防老剂RD生产，络合剂在废水处理过程中可重复使用，经济效益和社会效益良好。络合萃取法是目前较为先进的二苯基硫脲废水处理工艺之一。 |
| 英文摘要: |
| Complexing extraction process was used to treat the wastewater from the production of diphenylthiourea，an accelerator.The results showed that aniline in the wastewater was extracted with kerosene/di（2-ethylhexyl）phosphoric acid（P2O4） as complexing agent，and then the mass concentration of aniline and chemical oxygen demand（COD） of the wastewater was greatly reduced.When the flow rate ratio of complexing agent to wastewater was 1∶1.5 and the mass concentration of P2O4 in the complexing agent solution was 21.3 g·L-1，the removal rate of COD and aniline in the wastewater was over 97% and 99.5% respectively，and the loss of complexing agent was low.The treated wastewater entered the water treatment system.The extracted aniline was treated by acid washing to produce aniline hydrochloride for the production of antioxidant RD.The complexing agent P2O4 could be reused in the wastewater treatment process.This method possessed good economic and social benefits.Complexation extraction method was an advanced treatment process for diphenylthiourea-containing wastewater. |
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