July 15, 2016 - Making carbon dioxide react directly to the synthesis of polycarbonate - Tohoku University of Japan and Tokyo University of Science have announced the development of a catalyst to make carbon dioxide and binary alcohol (two hydroxyls combined with two different carbon fat family or lipid ring compounds), directly polymerized to directly synthesize polycarbonate. According to experts, from the perspective of reducing carbon dioxide emissions and achieving low-cost safe reaction reagents, the use of carbon dioxide to synthesize useful chemicals technology is highly anticipated. However, the chemical properties of carbon dioxide are stable and less reactive, making it difficult to convert.
and polycarbonates are useful engineering plastics and produce a lot of money, and if they can be synthesized with carbon dioxide, they are expected to make a significant contribution to CO2 reduction. The synthesis of polycarbonate with carbon dioxide and binary alcohols is recognized as the simplest and cleanest method, but this method strictly restricts the conversion rate based on chemical balance, and no previous studies have found an effective catalyst. The method developed uses zirconium oxide (SeO2) as a catalyst, using 50 atmospheric pressure (5MPa) of carbon dioxide to add 1,4-butyl glycol and 2-pyridine solvent pressure, at 130 degrees C to make it react. The study was carried out with the support of the Japan Public Trust ENENOS Hydrogen Fund. The results were published electronically in the April issue of scientific reports, an academic journal.
experts, the researchers have confirmed that polycarbonate can be obtained with a high yield of 97% (molecular weight 1070, dispersion 1.33) through an eight-hour response. In addition, when using a variety of long-chain binary alcohols, polycarbonate can also be obtained at a high yield (94 to 99%). Previously, when using binary alcohols to synthesize polycarbonate directly, only harmful reagents such as photogas were used. This method gives the possibility of synthesized polycarbonate with harmless carbon dioxide and binary alcohols. In addition, the use of biomass-derived binary alcohols, which have become active in recent years, is also expected to produce green polymers that do not use petroleum resources.