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coal extracts     
相关语句
  煤抽提物
     CONSTRUCTION OF STRUCTURE MODEL FOR COAL EXTRACTS BASED ON NMR AND FTIR SPECTRA
     用核磁共振和红外光谱构造煤抽提物的结构模型
短句来源
  “coal extracts”译为未确定词的双语例句
     This result indicates that polarity of solvents controls the relative content of saturated hydrocarbon and absolute concentration of biomarkers in coal extracts, but cannot change component and distribution pattern of biomarkers in coal extracts.
     这一结果表明抽提溶剂的极性差异可以导致煤的抽提物中饱和烃相对含量与生物标志物绝对含量的变化,但是在通常使用的抽提溶剂极限范围内,不会导致抽提物中生物标志物分布特征和相互比值的变化。
短句来源
     Chemical Composition and Their Geochemical Feature in Two Special Coal Extracts of Hunyuan Coal and Lupinite-Alkane Fraction
     浑源煤和乐平煤抽出物的化学组成及其地球化学特征——Ⅰ.烷烃部分
短句来源
     FTIR SPECTROSCOPIC ANALYSIS OF FUSHUN BITUMINOUS COAL AND COAL EXTRACTS
     抚顺烟煤及其抽出物的FTIR光谱结构表征
短句来源
     GC-MS Determination of Polycyclic Aromatic Hydrocarbons in Raw Coal Extracts and Emissions of Residential Coal Combustion
     家用燃煤及烟气中多环芳烃的GC-MS定量研究
短句来源
     Analysis of Coal Extracts of Pingsuo by Gel Permeation Chromatography
     平朔煤溶剂抽提物的凝胶色谱分析
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  相似匹配句对
     FLUORESCENT CHARACTERISTICS OF EXTRACTS FROM COAL
     煤抽提物的荧光特征
短句来源
     The Selecting Collection of Solvent Extracts of Coal
     煤溶剂抽提产物的选择性富集及分析
短句来源
     Viewpoint Extracts
     观点摘编
短句来源
     ON COAL METAMORPHISM
     煤的变质作用雏议
短句来源
     Coal and environment
     煤炭与环境
短句来源
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  coal extracts
The applied method is a fast and convenient tool for the characterization of evolved volatiles and thermal degradation products of coals and coal extracts.
      
Identification of dimethyl- and ethylphenanthrenes in HPLC-fractions of rock and coal extracts by capillary gas chromatography a
      
Proton and carbon-13 NMR data was starting to emerge as a major analytical tool for studying coal extracts and liquefaction products.
      
A major issue in the 60's and early 70's was the nature of the structure of coal and coal extracts.
      


The chemical structure of extracts obtained by supercritical fluid(toluene)extraction of Fuxin bituminous coal,Zhaotong brown coal andHuachuan peat was studied using ~1H and ~(13)C NMR spectroscopy.Averagemolecular structure parameters were calculated by Bartle method,fromresult of ~1H and ~(13)C NMR spectra,elemental analysis,averagemolecular weight and phenolic hydroxyl group determinations.The ~1Hand ~(13)C spectra of individual fractions of the three coal extracts shewthat the same fraction of different...

The chemical structure of extracts obtained by supercritical fluid(toluene)extraction of Fuxin bituminous coal,Zhaotong brown coal andHuachuan peat was studied using ~1H and ~(13)C NMR spectroscopy.Averagemolecular structure parameters were calculated by Bartle method,fromresult of ~1H and ~(13)C NMR spectra,elemental analysis,averagemolecular weight and phenolic hydroxyl group determinations.The ~1Hand ~(13)C spectra of individual fractions of the three coal extracts shewthat the same fraction of different coal extracts has a similar chemicalstructure.The aromatic rings of the aromatic fractions are mainlycata-condensed and linked by methylene bridge or oxygen and nitrogenatoms.The degree of condensation increases with the rank of coal.Fra-ction 2 contains a number of aromatic compounds existing as Ar—CH_2—Ar.For Zhaotong brown coal and Fuxin bituminous coal the aromaticgroups are mainly single rings,however,for Huachuan peat the aromaticgroups are both single and double rings.

用~1H和~(13)C核磁共振谱研究了阜新烟煤,昭通褐煤和桦川泥煤超临界流体抽提抽出油的组成结构。~(13)C谱可以直接测定分子骨架碳原子的分布,由~1H 和~(13)C 谱脂肪区的信号直接算出烷基侧链H/C原子比。根据~1H 谱、元素分析、平均分子量和羟基测定,采用Bartle的方法计算了三种煤抽出油色谱馏分的平均分子结构参数。

Three samples of Feng Feng bituminous coal, fat coal, coking coal and lean coal, were investigated. Extraction was carried out in a semi-continuous installation with tolnene at 340℃ and 20MPa.The extract was separated into six fractions by solvent extraction and silicagel liguid ehromatographyo Their composition and structure were studied on the basis of ~1H-NMR,~(13)C-NMR and IR spectra. The average molecular structural parameters of subfraction were derived from ~1H and ~(13)CNMR...

Three samples of Feng Feng bituminous coal, fat coal, coking coal and lean coal, were investigated. Extraction was carried out in a semi-continuous installation with tolnene at 340℃ and 20MPa.The extract was separated into six fractions by solvent extraction and silicagel liguid ehromatographyo Their composition and structure were studied on the basis of ~1H-NMR,~(13)C-NMR and IR spectra. The average molecular structural parameters of subfraction were derived from ~1H and ~(13)CNMR coupled with molecular weight and elemental analysis data.Experimental results show that the composition and structure of three hituminous coal make a difference with degree of metamorphism. Tne content of oil in coking coal extract is higher than fat and leaf cola (35.6%) .The content of asphaltene in lean coal extract is higher than fat and coking coal (67.7%) .The carbon aromatieity of lean coal is the highest in three coals. The alkyl side chain of fat coal is longer than coking and lean coal.

选用了峰峰矿不同变质程度的三种烟煤为原料,在20MPa,340℃条件下,以甲苯为溶剂进行超临界抽提。采用溶剂萃取和硅胶色谱法将抽出油分为F_1~F_6六个馏分,从各馏分的~1H-NMR谱图、~(13)C-NMR谱图和IR光谱图分析了它们的组成、结构;由元素分析和平均分子量数据,采用~1H-NMR谱和~(13)C-NMR谱相结合的计算方法,获得了各馏分的平均结构参数。实验结果表明:随着变质程度的不同三种烟煤的组成结构存在着差异,焦煤抽出物中的油含量较高(35.6%),瘦煤抽出物中的沥青烯含量较高(67.7%);三种烟煤中瘦煤的芳碳率最高,而肥煤比焦煤、瘦煤有较长的烷基侧链。

Polynuclear aromatic sulfur heterocycles(PASHs)were isolated from a coalextract by two-step separation method using silica gel column chromatography and ligandexchange thin layer chromatography(PdCl_2/SiO_2).The subfraction was examined by capil-lary column gas chromatography with flame ionization detector and flame photometric detec-tor and gas chromatography-mass spectrometry.Identification was accomplished by com-parison of chromatographic retention indices and mass spectra of compounds with those re-ported...

Polynuclear aromatic sulfur heterocycles(PASHs)were isolated from a coalextract by two-step separation method using silica gel column chromatography and ligandexchange thin layer chromatography(PdCl_2/SiO_2).The subfraction was examined by capil-lary column gas chromatography with flame ionization detector and flame photometric detec-tor and gas chromatography-mass spectrometry.Identification was accomplished by com-parison of chromatographic retention indices and mass spectra of compounds with those re-ported in the literatures.It was found that the principal structures of the sulfurcontainingfraction of Guiding coal extract have 3~4 aromatic rings. Dibenzothiophene,C_1~C_3 alkylat-ed dibenzothiophenes,benzonaphthothiophene and its alkylated derivatives were the maincomponents.Only a few of other polynuclear sulfur heterocycles were detected. No benzoth-iophene and its derivatives were present.

煤的索氏抽出物中的含硫多环芳香化合物(PASH)由硅胶柱色谱与配体交换薄层色谱(PdCl_2/SiO_2)两步分离,用毛细管气相色谱(FID与FPD)和色质联用仪分析其组成、结构。通过与文献的色谱保留指数相比较、质谱数据验证,鉴定出贵定煤含硫芳香化合物以三、四环结构为主,主要是二苯并噻吩及其C_1~C_3烷基取代物、苯并萘并噻吩及其烷基取代物,其它稠环含硫芳香化合物较少。

 
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