Polycarbonate recycling technology is also progressive

Date:2022-7-19 Author:Sam

Recently, several Japanese companies have made new progress in the recycling of polycarbonate (PC), providing strong technical support for the recycling of this material and sustainable development.
\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;
\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; PC recycling and utilization technology is noticeable. First of all, Japan Victor Company and Japan Advanced Industry Technology Research Institute (AIST) and the Japan Cleansing Center recycled high purity from the abandoned CD. The process of bisphenol A can use this process to redeem PC’s bisphenol A to 80%, and the purity reaches 99.9%. This process enables the abandoned disc at about 200 ° C and 2MPa pressure, and sodium carbonate used in cyclum ketone as a catalyst to make it decompose in nitrogen. After one hour of decomposition, about 78%of PCs are decomposed into coarse bisphenol A A. (Among them, it contains a small amount of phenol). After four -step distillation in a small test high -pressure kettle, bisphenol A’s purity can be increased to 99.9%. The specific steps of distillation are as follows: the first step is removed, the second step is to remove the low boiling phenol, the third step is to remove organic carbonate, and the fourth step is to separate bisphenol A from heavy oil residues.
\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;Profile extrusion line\u0026nbsp;
\u0026nbsp;\u0026nbsp \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; Emperor Chemical Company has developed a new process that can fully recycle the use of waste polycarbonate. This process adopts unique purification technology, which can recycle high -purity bisphenol A from the waste polycarbonate disc. The emperor’s process is different from the recycling process mentioned above. In this process, polycarbonate is decomposed by strong alkali under normal pressure and 40-50 ° C. The generated bisphenol A can be directly used for reproductive polycarbonate. At present, Emperor Chemical Company has established medium -sized devices in the factory of Matsuyama, Japan, and is put into operation. It can handle 500 to 1,000 tons of waste polycarbonate each year.
\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp;Using equipment, recycling scrapped TV cases and other flame retardant PC products, the impact strength and other performance of the recycling material are basically not affected. The products made with recycled materials can be recovered again by this device, which can be recycled about 10 times.