丙烯腈实际废水水热碱催化产有机酸的试验研究

Organic acid production from practical acrylonitrile wastewater by alkaline hydrothermal catalytic process

含氰废水是一类毒性巨大的工业废水,但其中含有大量有价值的化工原料,而现有处理方法难以实现该废水的资源化利用。在对丙烯腈实际废水水质及主要有机组分进行分析的基础上,对其进行了水热碱催化产有机酸试验,并对反应条件进行了优化。结果表明:最适反应条件为反应温度300℃、反应时间90s、NaOH初始摩尔浓度1mol/L。在此条件下,产物中丙烯酸、乙酸、甲酸分别为13 300、9 400、19 800mg/L,说明水热碱催化可有效实现丙烯腈实际废水的资源化。

As a kind of wastewater with high toxicity,the cyanide-containing wastewater composed of many val- uable chemicals as well. Its resource utilization was difficult to realize using present treating processes. Based on the analysis of the water quality and the main organic components of the practical acrylonitrile wastewater, experiments had been done to produce organic acids under hydrothermal alkaline catalytic conditions and the reaction conditions were optimized. Under the optimal reaction conditions that the reaction temperature was 300 ℃ ,reaction time was 90 s and initial NaOH concentration was 1 tool/L, the concentrations of acrylic acid, acetic acid and formic acid were 13 300,9 400 and 19 800 mg/L, respectively. The results indicated that through hydrothermal alkaline catalytic process, the resourcing of acrylonitrile wastewater could be realized effectively.