微波辐射条件下H2O2氧化蒽合成蒽醌的研究

研究了微波辐射条件下H2O2氧化蒽的反应，考察了时间、H2O2用量、催化剂和溶剂对葸醌收率的影响。结果表明．CH3COOH浓度对蒽醌的收率影响很大，以适量的(CH3COO)3Fe作为催化剂可以增加蒽醌的收率和缩短反应时间。     

聚乙二醇/涤纶接枝共聚固-固相转变贮热材料

为了制备热稳定性好、蓄热性能优异的固-固相转变材料(PCM),研究采用化学法合成了聚乙二醇(PEG)/涤纶(PET)PCM。实验结果表明,PEG/PET PCM的热力学性能与PEG的分子量、PEG/PET质量配比以及不同交联体系有关。化学接枝法合成的PEG/PET PCM,最大相变焓可达112.02 J/g,热稳定性提高,热滞后性减小,PEG/PET PCM在众多领域具有广泛应用。     

Reactivities of Shenfu Chars Toward Gasification with Carbon Dioxide

Five Shenfu char samples were prepared from Shenfu raw coal at different temperatures （950, 1100, 1200, 1300 and 1400℃） using a muffle furnace. Demineralization of the char samples was performed by treating them with 10% nitric acid for 10 min in a CEM Discover microwave reactor. The gasification of the chars, and corresponding demineralized chars, in a carbon dioxide （CO2） atmosphere was conducted in a Netzsch STA 409Cl31F tempera- ture-programmed thermogravimetry apparatus. The effects of charring temperature and demineralization on the gasification reactivity of chars were systematically investigated. The results show that a char formed at a lower temperature is more reactive except for demineralized char formed at 1100℃, which is less reactive than char formed at 1200℃. Demineralization decreases the char reactivities toward gasification with CO2 to a small extent.     

温和条件下黑岱沟萃余煤的双氧水氧化产物分析

依次用体积比为1：2的甲醇／四氢呋喃和二硫化碳（CS2）／四氢呋喃混合溶剂对新疆黑岱沟（HDG）煤进行彻底萃取．在40℃和60℃下用30％双氧水溶液氧化得到萃余煤,用GC／MS分析了反应混合物中的水不溶物的CS2可溶物（A）和水溶液的苯可溶物（B）,并用FTIR分析了反应混合物中水溶液的苯不溶物（C）,以寻求煤的高附加值利用及其大分子结构信息．结果表明：在A中均检出多种羧酸和长链烷烃,在60℃下氧化所得A的收率较高,且其中含氧化合物的种类更多;在40℃下氧化所得B中只检出蒽和少量直链烷烃,在60℃下氧化所得B中只检出少量的蒽;C中羟基和取代芳环含量较高,只是60℃下氧化所得的C的收率更高,且含羟基更丰富．