锡林浩特褐煤萃取-反萃取产物的氧化解聚

Oxidation Degradation of Extraction-Anti-extraction Product from Xilinhaote Lignite

采用混合溶剂二硫化碳/N-甲基吡咯烷酮(CS2/NMP)萃取和反萃取锡林浩特褐煤(XL),得到一种棕褐色的萃取物颗粒(XLE),在60℃下用质量分数为30%的双氧水溶液分别对XL和XLE进行氧化解聚,结合傅里叶变换红外光谱仪(FTIR)和气相色谱-质谱联用仪(GC/MS)分析氧化产物的结构和组成。结果表明:萃取和反萃取产物颗粒较细,粒径达到纳米级;XL和XLE均有较好的氧化解聚效果,氧化后均检测到大量醇、醛、酚、酸、酮、醚和酯等含氧有机化合物;相对于XL,XLE检测到的含氧化合物种类更多、含量更丰富。

Brown extract particles(XLE)were obtained by extraction and anti-extraction from Xilinhaote lignite(XL)with carbon disulfide and N-melthy-2-pyrolidinone(CS2/NMP)mixed solvent.Then the XL and XLE were oxidized respectively with 30%(mass fraction)hydrogen peroxide at 60℃,and the structure and composition of oxidation products were analyzed with Fourier transform infrared spectrometer(FTIR)and gas chromatography/mass spectrometer(GC/MS).The results indicate that the extraction products show small particles with nanometer size,both XLand XLE show excellent oxidative degradation.Aseries of oxygen-containing species such as alcohols,aldehydes,phenols,acids,ketones,ethers and esters are detected after oxidation.Compared with XL,more kinds and contents of oxygen-containing species can be detected from XLE.