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1. 发明授权

US5369215A Depolymerization method for resource recovery from polymeric wastes 失效
标题翻译：聚合废物资源回收解聚方法
公开(公告)号：US5369215A
公开(公告)日：1994-11-29
申请号：US107281
申请日：1993-08-16
申请人： Gerald A. Platz
发明人： Gerald A. Platz
IPC分类号： C07B63/02 , C07C4/22 , C07C4/04 , C07C4/06
CPC分类号： C07B63/02 , C07C4/22 , B29B17/02 , B29L2030/00 , C07C2527/232 , Y02W30/622 , Y02W30/68 , Y10S241/37 , Y10S264/912 , Y10S425/044
摘要： Polymeric feedstocks, such as scrap or waste tires, rubber, and plastics, in a size range of -6 to +25 mesh are washed with an organic solvent to remove stabilizing additives which have migrated to the surface of the polymer particles, thus eliminating the stabilizers from participation in subsequent reactions and allowing the final production of more pure monomeric products. The polymer particles are exposed to ozone under conditions to cause stress cracking, fissuring and cleavage of the polymer feedstock particles. The ozonated polymer particles are depolymerized to produce one or more monomeric compounds, with the reaction taking place rapidly and occurring in the presence of a system of one or more catalysts which may be metallic salts. The depolymerization is accomplished under conditions of elevated temperatures and reduced pressure, the conditions being less severe than those conditions associated with thermal pyrolysis. The monomeric compounds are recovered by conventional means from otherwise waste polymers and are recycled. Other products of this invention may be collected and recycled or disposed of with no adverse impact on the environment.
摘要翻译：用有机溶剂洗涤尺寸范围为-6至+25目的聚合物原料，例如废料或废轮胎，橡胶和塑料，以除去迁移到聚合物颗粒表面的稳定添加剂，从而消除稳定剂参与后续反应并允许最终生产更纯的单体产品。聚合物颗粒在引起应力开裂，裂缝和聚合物原料颗粒裂开的条件下暴露于臭氧。臭氧化的聚合物颗粒被解聚以产生一种或多种单体化合物，反应发生迅速并且在一种或多种可以是金属盐的催化剂的体系存在下发生。解聚在升高的温度和降低的压力条件下完成，条件不如热分解条件那么苛刻。通过常规方法从另外的废聚合物中回收单体化合物并且被再循环。本发明的其它产品可以被收集和再循环或处理，对环境没有不利的影响。

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