| 溶剂萃取法对苯甲酸废水预处理的研究 |
| 摘要点击 1764 全文点击 2999 投稿时间：2000-12-03 |
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| 中文关键词 苯甲酸 络合萃取 磷酸三丁酯 三烷基胺 三烷基氧膦 |
| 英文关键词 benzoic acid wastewater extraction by chemical association tributyl phosphate trialkylamine trialkyphospine oxide |
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| 中文摘要 |
| 甲苯液相空气氧化法生产苯甲酸废水的成分复杂,属生物难降解体系,CODCr值高达20000～100000mg/L.本研究分别采用磷酸三丁酯、三烷基胺、三烷基氧膦为络合剂,正辛醇为助溶剂,煤油为稀释剂,通过萃取-反萃的方式,对苯甲酸废水进行处理.结果表明,多级错流萃取能有效地回收溶质苯甲酸,将原废水的CODCr值降低至1/6,使之满足其它末端处理的要求,而且反萃工艺简单易行,可生产苯甲酸盐,溶剂可重复使用. |
| 英文摘要 |
| The benzoic acid wastewater produced from toluene by liquid-phase oxidation is one of the difficult wastewater to treat because of multi-component, high CODCr value (20 000～100 000mg/L) and nonbiodegradability. A pretreatment way of this wastewater by extraction based on chemical complexation was carried out, and tributyl phosphate (TBP), trialkylamine (7301) and trialkyphosphine oxide (TRPO) were used as complexing agent with n-octanol, kerosene as cosolvent and diluent respectively. Results showed that benzoic acid was recovery successfully and the CODCr value of wastewater was reduced to 1/6 of the initial value through multi-stages cross-flow extraction. Back-extraction was quite easy and the solvent could be reused. |
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