• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Glycolytic aminolysis of poly(ethylene terephthalate) waste for recovery of value-added comonomer at atmospheric pressure
【24h】

Glycolytic aminolysis of poly(ethylene terephthalate) waste for recovery of value-added comonomer at atmospheric pressure

机译：聚对苯二甲酸乙二醇酯废料的糖酵解氨解，用于在常压下回收增值共聚单体

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Reaction of poly(ethylene terephthalate) waste (PETW) powder with ethylene glycol (EG) using 0.003 mol lead acetate as a catalyst was carried out in a batch reactor at 470 K under atmospheric pressure. Reactions were undertaken with various particle sizes ranging from 50 to 512.5 mum and reaction times ranging from 10 to 60 min at 10-min intervals. A low molecular weight product of PETW was obtained using this reaction. Then hydrazine monohydrate, chlorobenzene, and cyclohexylamine (CHA) were introduced to convert the low molecular weight product of PETW into terephthalohydrazide (TPHD). To increase the PETW conversion rate, an external catalyst (lead acetate) was introduced during the reaction. The reaction product was deposited onto the surface of unreacted PETW that was removed from the surface by introducing dimethyl sulfoxide. To accelerate the reaction rate CHA was introduced during the second stage of reaction, which has industrial significance. Depolymerization of PETW was proportional to the reaction time and inversely proportional to the particle size of PETW. Analyses of value-added products (TPHD and EG) as well as PETW were undertaken. A kinetic model was developed and experimental data were simulated consistent with the model. A thermodynamic study was undertaken because this is required during the transfer of laboratory data through the pilot plant for commercialization. (C) 2003 Wiley Periodicals, Inc. [References: 21]
机译：在大气压下于470 K的间歇反应器中，使用0.003 mol乙酸铅作为催化剂，使聚对苯二甲酸乙二醇酯废料（PETW）粉末与乙二醇（EG）反应。以10到50分钟的间隔，从50到512.5微米的各种粒径和10到60分钟的反应时间进行反应。使用该反应获得PETW的低分子量产物。然后引入一水合肼，氯苯和环己胺（CHA），将PETW的低分子量产物转化为对苯二酰肼（TPHD）。为了提高PETW的转化率，在反应过程中引入了外部催化剂（乙酸铅）。将反应产物沉积在未反应的PETW的表面上，通过引入二甲基亚砜将其从表面除去。为了提高反应速度，在反应的第二阶段引入了CHA，这具有工业意义。 PETW的解聚与反应时间成正比，与PETW的粒径成反比。对增值产品（TPHD和EG）以及PETW进行了分析。建立了动力学模型，并模拟了与模型一致的实验数据。进行热力学研究是因为在通过试验工厂进行实验室数据传输以进行商业化过程中需要进行此过程。 （C）2003 Wiley Periodicals，Inc. [参考：21]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号