[题名]从聚四氟乙烯 (PTFE) 废物中回收有价值的产品

[作者] I. J. van derWalt

[摘要] 处理聚四氟乙烯（PTFE）废弃物是一个从生态和经济角度都令人头疼的全球性问题。本研究旨在解决这一问题，并了解PTFE解聚形成不同产物（即C2F4、C2F6、C3F6、C3F8和c-C4F8）的机制。

针对填充和未填充的PTFE，设计了不同的概念反应器并进行了不同试验。这些反应器包括用于测试水平反应器中解聚性能的实验室规模旋转窑反应器、用于连续解聚未填充PTFE的落管反应器、用于连续解聚填充和未填充PTFE的桨式反应器，以及用于评估其他氟聚合物（如THV、HTE、ETFE和PFA）的振动反应器。使用GC、GC/MS、TGA和SEM等分析技术评估不同类型的PTFE，并分析解聚过程中产生的气体产物。

[关键词] PTFE、回收有价值产品、废物

[Title] Recovery of valuable products from polytetrafluoroethylene (PTFE) waste

[Author] I. J. van derWalt

[Abstract] The disposal of PTFE waste presents a global problem from both an ecological and economical perspective. This study was performed to address this problem as well as to understand the mechanism according to which PTFE is depolymerised to form the different products, namely C2F4, C2F6, C3F6, C3F8 and c-C4F8.Different conceptual reactors were designed and built for different tests on filled and unfilled PTFE. These included a laboratory scale Rotating-kiln Reactor for testing the depolymerisation properties in a horizontal reactor, a Drop-tubeReactor for the continuous depolymerisation of unfilled PTFE, a Paddle Reactor for the continuous depolymerisation of filled as well as unfilled PTFE and a Vibrating Reactor for the evaluation of other fluoropolymers like THV, HTE, ETFE and PFA. Analytical techniques such as GC, GC/MS, TGA and SEM were used to evaluate the different types of PTFE and analyse the gaseous products from the depolymerisation process.

[Keywords] PTFE、Recovery of valuable products、waste