响应面法优化废PET塑料降解制备TPA的工艺.pdfVIP

化 工 进 展 2016 年第 35 卷第 7 期 CHEMICAL INDUSTRY AND ENGINEERING PROGRESS ·2243 · 研究开发 响应面法优化废 PET 塑料降解制备 TPA 的工艺 胡浩斌，武芸，朱治明 （陇东学院化学化工学院，甘肃庆阳 745000 ） 摘要：采用微波辅助碱催化降解废聚对苯二甲酸乙二醇酯（PET ）塑料制备对苯二甲酸（TPA ），运用Box-Behnken 中心组合试验设计原理，通过单因素试验筛选催化剂用量、碱液用量、降解温度和时间为主要因素，进行四因 素三水平的响应面分析，建立 TPA 产率的二次响应面模型，确立制备工艺的优化组合条件，并对产品的结构和 性能进行测定。结果表明，TPA 产率与四因素关系符合二次模型，四因素的一次项和二次项及催化剂用量和碱 液用量的交互作用对TPA 产率具有显著影响。综合考虑产品性能和实际操作因素，经修正及近似验证后获得最 佳制备工艺为：2.7gTOMAB，260mL15%NaOH，降解温度85℃，降解时间2.2h。在该条件下进行3 次重复试验， TPA 的实际平均产率为97.53% ，与预测值98.59%无显著差异，说明该优化方法是可行的。 关键词：废聚对苯二甲酸乙二醇酯塑料；降解；制备；优化；对苯二甲酸；响应面法 中图分类号：TQ 325.120.6 文献标志码：A 文章编号： 1000 –6613 （2016 ）07 –2243 –08 DOI ：10.16085/j.issn.1000-6613.2016.07.042 Optimization of TPA preparation technology from waste PET by response surface methodology HU Haobin，WU Yun ，ZHU Zhiming （College of Chemistry Chemical Engineering，Longdong University，Qingyang 745000，Gansu，China ） Abstract ：Terephthalic acid （TPA ） was prepared from the degradation of waste polyethylene terephthalate （PET ）with microwave-assisted and alkali catalysis. The Box-Behnken center-united experimental design principles were applied. Dosages of catalyst and alkali，pyrolysis temperature and time were chosen as causal factors on the basic of single-factors experiments. The responsive surface analysis of 4-factors-3-levels was adopted. The quadratic surface model of TAP yield was established. The optimum combination was obtained. The structure and property of TPA were determined. Results indicated that TPA yield and the four factors conform with the quadratic model，the linear and quadratic ter