Isolation and Identification of Fatty Acid Amides from Shengli Coal

Abstract

Shengli coal, a Chinese brown coal, was extracted with carbon disulfide and the extract was gradiently eluted with n-hexane and ethyl acetate (EA)/n-hexane mixed solvents with different concentrations of EA in a silica gel-filled column. A series of fatty acid amides, including fourteen alkanaimdes (C15−C28) and three alkenamides (C18 and C22), were isolated from the coal by this method and analyzed with a gas chromatography/mass spectrometry.

The Effect of Pretreatment with H2O2on the Oxidation of Shenfu Subbituminous Coal with NaOCl

“…Various NCSs were identified from extracts of coals Ding et al, 2008;Zong et al, 2009;Wei et al, 2009;Cao et al, 2010) and reaction mixtures of coals (Wei et al, 2002;Liu et al, 2003), but to the authors' knowledge, no reports were issued on the detection of any NCSs in the products from coal oxidation.…”

Application of mass spectrometry in the characterization of chemicals in coal‐derived liquids

“…NCCs in extracts from coal extraction and thermal dissolution can more truly represent the original nitrogen forms in coals since the cleavage of covalent bonds involving N almost does not occur during low‐temperature extraction and thermal dissolution. Several investigations have focused on the separation and characterization of NCCs in the extracts from low‐temperature extraction (Ding et al, ; Wei, Wang, & Zong, ; Cao et al, ) and thermal dissolution (Liu et al, ; Wang et al, ) of coals. Ding et al () separated a series of fatty acid amides from Shengli lignite through extraction in carbon disulfide followed by column chromatography and identified by GC/MS.…”

“…Several investigations have focused on the separation and characterization of NCCs in the extracts from low‐temperature extraction (Ding et al, ; Wei, Wang, & Zong, ; Cao et al, ) and thermal dissolution (Liu et al, ; Wang et al, ) of coals. Ding et al () separated a series of fatty acid amides from Shengli lignite through extraction in carbon disulfide followed by column chromatography and identified by GC/MS. The detected fatty acid amides are composed of fourteen alkanamides (C 15 –C 28 ) and three alkenamides (C 18 and C 22 ), as listed in Table .…”

Separation and Analysis of the Products from Supercritical Ethanolysis of Huolinguole Lignite

“…Column chromatography is a common way for separation of complex mixtures and has been used to separate organic compounds from coals and other fossil resources (Ding et al, 2008;Zong et al, 2009;Kotarba and Clayton, 2003). Using this technique, we tried to enrich some organic compounds in ethanol-soluble portion (ESP) from SCE of Huolinguole lignite (HL) at 330 ı C.…”