|导师||侯震山 ; 吾满江.艾力|
|关键词||二氧化碳 环氧丙烷 碳酸丙烯酯 生物基碳酸酯 多相催化剂|
In this thesis, the five-membered cyclic carbonates were synthesized by cycloaddition reactions of propylene oxide, epoxidized cottonseed oil and carbon dioxide, which not only reduced the emission of the greenhouse gas carbon dioxide but obtained propylene carbonate and bio-based material carbonated cottonseed oil that could be applied in the lubrication industry. The main contents and conclusions were as follows. Heterogeneous supported catalysts whose supports included cellulose, γ-Al2O3, MCM-41 and composite cellulose/γ-Al2O3 were prepared by impregnation method in which KI was used as the main catalyst and zinc halides as the promoters. Those heterogeneous supported catalysts exhibited high catalytic activity when they were used as the catalysts of the cycloaddition reaction of propylene oxide and carbon dioxide in the batch autoclave. However, they exhibited poor stability for recycling in the batch autoclave. The reason for their poor stability in the batch autoclave was that after taking part in the high temperature and pressure reaction the main catalyst KI was prone to be oxidized by the oxygen in the air. When the catalyst cellulose/γ-Al2O3 was applied in the continous fixed-bed reactor to catalize the cycloaddition of propylene oxide and carbon dioxide, it was observed that the highest single-pass yield of propypene cabonate was about 50% and the catalytic activity of the catalyst did not decrease until sixteen hours. The carbonated cottonseed oil was prepared by adding carbon dioxide to epoxidized cottonseed oil using tetrabutylammonium bromide as the catalyst. The effect of reaction temperature, pressure, time, and the amount of catalyst on the cycloaddition reaction was also investigated. The properties of the products as the lubricant base oil were investigated and the results showed that compared with the epoxidized cottonseed oil, the carbonated cottonseed oil possessed better oxidation and thermal stability, friction-reducing, anti-wear and extreme pressure properties.
|罗燕平. 五元环碳酸酯的合成及其在润滑油领域的应用[D]. 北京. 中国科学院大学,2013.|
|五元环碳酸酯的合成及其在润滑油领域的应用（871KB）||学位论文||开放获取||CC BY-NC-SA||浏览 请求全文|