On June 5th, from the Changchun Institute of Applied Chemistry of the Chinese Academy of Sciences, a news report was issued by the Institute of Applied Sciences of the Chinese Academy of Sciences. The key directional project of the Knowledge Innovation Project of the Chinese Academy of Sciences, the key technology for the industrialization of carbon dioxide-based plastics, has completed a 30,000-ton/year production line process package. design. This indicates that China has made significant progress in the research and development of carbon dioxide-based plastics .
Wang Xianhong, a researcher in charge of the project, said that compared with the 10,000-ton production line that has been built, this process package uses a second-generation catalyst and the degree of automation has been greatly improved. The 30,000-ton/year production line process package design completed by the project laid a technical foundation for China to establish a biodegradable carbon dioxide-based plastics industry with world competitiveness.
The project team developed an efficient, stable, low-cost rare-earth three-way catalyst loading technology and combined catalyst technology for the bottleneck problem of biodegradable carbon dioxide-based plastic engineering. The polymerization activity was higher than 120 g/g catalyst for 8 hours. The relative molecular mass of the polymer product reaches more than 150,000 and can be regulated between 80,000 and 150,000. At the same time, the project team completed the design and manufacture of large-volume (15 cubic meters) high-pressure polymerization reactors, breaking through post-processing technologies such as precipitation, washing, drying, monomer recovery and purification, and polymer on-line modification technologies. The content of heavy metals in the polymer meets the requirements of the American Biodegradable Plastics Association. At the same time, the modified carbon dioxide-based plastic film has been toughened and reinforced to reach the level of high-density polyethylene film, and has passed the US BPI certification. The project was approved by experts from the High Technology Research and Development Bureau of the Chinese Academy of Sciences on May 25.
During the study period, the project team applied for 3 international patents and 17 Chinese invention patents in the design and preparation of three-way catalysts for carbon dioxide-based plastics, multi-polymerization technologies, post-polymerization processing technologies, and modification technologies, and has obtained two domestic invention patents. Authorization.
Carbon dioxide based plastic is a green polymer material made from carbon dioxide and epoxy compounds as the main raw materials and chemically produced. It can not only efficiently use carbon dioxide, turn waste into treasure, but also has good gas barrier and transparency, and can be completely Biodegradation is expected to be widely used in the field of disposable medical and food packaging. In order to accelerate the industrialization of carbon dioxide-based plastics and face the country’s major demand for the comprehensive utilization of carbon dioxide and the development of low-carbon industries, Changchun Yinghua Institute undertook the research on the key technology projects for the industrialization of carbon dioxide-based plastics in 2008. In cooperation with Zhejiang Taizhou Bangfeng Plastics Co., Ltd., it established a 10,000-ton CO2-based plastics production line and completed its operation test on May 15 this year.
Fluorine-containing electronic special gas
ZSEM main semiconductor process materials are fluoride etching gases such as fluorine-containing electronic special gases. Currently available large-scale supplies include trifluoromethyl iodide (CAS: 2314-97-8) and xenon difluoride (CAS: 13709-36) -9 ), boron trifluoride 11, perfluorobutadiene (CAS: 685-63-2), chlorine trifluoride (CAS: 7990-91-2), nitrogen trifluoride (CAS: 7783-54- 2) Germanium tetrafluoride (CAS:7783-58-6), titanium tetrafluoride (CAS:7783-63-3), tungsten hexafluoride (CAS:7783-82-6), molybdenum hexafluoride ( CAS:7783-77-9), sodium trifluoromethanesulfinate (CAS:2926-29-6), etc.
Fluorinated electronic special gas,Semiconductor process materials,Fluorinated fine chemicals
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