摘要
对云南昭通褐煤蜡树脂中游离酸、结合酸、树脂醇、树脂烃进行了GC-MS研究.结果显示,昭通树脂烃中D-环单芳藿烷及17β(H),21β-藿烷为含量最高的特征化合物,其它五环三萜及芳构化物质虽有分布,但量极低.树脂游离酸中正构烷酸为主要化学成分,C14～C30都有分布,其中C16,C18,C24,C28构成了含量上优势化合物,C16为含量最高的化合物.树脂结合酸中C14～C30正构烷酸其含量占绝对优势,并按C16>C18>C20>C22>C24>C26>C28顺序递减.树脂醇由C15～C30正构烷醇(C24,C26为该系列重要化合物)、C18,C23,C25,C27,C29-甲基酮,以及羽扇-3-酮、桦木-3-酮、24-甲基-5β(H)-胆甾烷-3β-醇、24-乙基胆甾-5、22-二烯-3β-醇、24-乙基-5α(H)-胆甾烷-3β-醇、23,24-二甲基胆甾-5-烯-3β-醇、C29-5β(H)、3β(OH)-甾醇等组成.稠环芳烃、松香酸、去氢松香等环状化合物含量很低或不存在,是昭通褐煤蜡与国内其它褐煤蜡组成的重大差别.
The free acid, combined acid, alcohol and hydrocarbon fractions in brown coal resin, separated from Zhaotong brown coal wax (Yunnan Province), were studied on gas chromato- graphy-mass spectrometer.By the experimental results, D-ring-monoaromatic hopane and 17β(H), 21β-hopane are the characteristic compounds with the highest amount in the fraction of hydrocarbons of Zhaotong brown coal resin.The others of pentacyclic triterpanoids and their aromatized triterpanes are existed, but much lower in content than that in Xundian, Liaohu, Shulan brown coal resins. The normal fatty acids from C_(14) to C_(30) are distributed and C_(16), C_(18), C_(24), C_(26), C_(28) acids are predominant of free acids in Zhaotong brown coal resin, with a distribution order of C_(16)>C_(26)≥ C_(24)>C_(18)>C_(28)>C_(22)>C_(25)>C_(20). An absolutely predominant amount of fatty acids with normal long chain from C_(14 )to C_(30) are found in combined acids in resin, the content is decreased with the increase of the carbon number in the fraction, that is, C_(16)>C_(18)> C_(20)> C_(22)> C_(24)> C_(26)> C_(28), and with strong odd-even rule.Alcohol of fraction in brown coal resin consists primarily of normal long chain alcohols with carbon number from C_(15) to C_(30) (C_(24), C_(26) as major compounds in the series), C_(18), C_(23), C_(25), C_(27), C_(29)-methyl ketones, lupan-3-one, friedelan-3-one, ββ-bihomohopan -33-one, 24-methyl-5β (H)-cholestane-3β-ol, 24-ethyl-cholest 5,22-dien-3β-ol, 24-ethyl-5α (H)- choestane-3β-ol, 23,24-dimethyl-cholest-5-en-3β-ol, C_(29)-5β(H), 3β(OH)-sterol, etc.That polyring aromatised hydrocarbons, dehydroabietic acid, other tricyclic diterpanoic acids and pentacyclic triterpanoic acids are not existed or in a much low amount in Zhaotong brown coal resin is distinguished from those resins isolated in Xundian, Liaohu, Shulan brown coal waxes in China.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2004年第3期328-332,共5页
Journal of China Coal Society
基金
煤炭科学基金资助项目(97加12724)
云南省应用基础基金资助项目(95E051M)
关键词
云南昭通
褐煤蜡
褐煤树脂
化学组成
GC-MS分析
Yunnan Zhaotong
brown coal wax
brown coal resin
chemical constituents
GC-MS analysis
