程雪云, 李梅, 孙功成,等.离子液体/NMP对双马萃余煤的结构和萃取性能影响[J].河南理工大学学报（自然科学版）,2021,40(5):160-166.

CHENG X Y, LI M, SUN G C, et al.Influence of ionic liquids/NMP on the structure and extraction performance of Shuangma s extraction residue[J].Journal of Henan Polytechnic University(Natural Science) ,2021,40(5):160-166.

离子液体/NMP对双马萃余煤的结构和萃取性能影响

程雪云1, 李梅1,2,3, 孙功成1, 丁宁1, 岳劲松1, 徐荣声1

1.北方民族大学 化学与化学工程学院，宁夏 银川 750021;2.北方民族大学 宁夏太阳能化学转化技术重点实验室，宁夏 银川 750021;3.北方民族大学 国家民委化工技术基础重点实验室，宁夏 银川 750021

摘要:为研究离子液体/NMP对双马萃余煤的结构和萃取性能影响，首先分别用乙醇和丙酮对宁东双马煤样（SM）进行分步萃取，得到萃余煤（SMEC），然后将不同种类的离子液体（ILs）分别与N-甲基吡咯烷酮（NMP）混合后对SMEC进行萃取。用TG研究ILs/NMP萃取前后煤样热分解特性的变化，用FT-IR研究ILs/NMP萃取前后煤样官能团的变化，用GC/MS分析萃取物的种类。结果表明，ILs/NMP萃取后煤样的热失重增大，萃余煤中含氧官能团含量下降。另外，疏水型离子液体/NMP对SMEC煤的累积萃取率大于亲水型离子液体/NMP的累积萃取率。亲水型离子液体［Bmim］Cl/NMP和［Bmim］BF₄/NMP分别萃取出51种和44种有机物质；疏水型离子液体［Bmim］ NTf₂/NMP和［Bmim］PF₆/NMP分别萃取出28种和29种有机物质。疏水型离子液体/NMP对SMEC煤中含氧官能团化合物的萃取能力强于亲水型离子液体/NMP；疏水型离子液体/NMP对SMEC煤中含杂原子化合物的萃取能力小于亲水型离子液体/NMP。

关键词:萃余煤;分步萃取;有机物质;疏水型离子液体;亲水型离子液体

doi:10.16186/j.cnki.1673-9787.2020010027

基金项目:国家自然科学基金资助项目（21666001）；校企联合横向项目（2018HLz18）；北方民族大学校级重大专项（ZDZX201803 ）； 北方民族大学科研平台项目（201707）；北方民族大学研究生创新项目（YCX19114）

收稿日期:2020/01/08

修回日期:2020/06/04

出版日期:2021/09/15

Influence of ionic liquids/NMP on the structure and extraction performance of Shuangma s extraction residue

CHENG Xueyun1, LI Mei1,2,3, SUN Gongcheng1, DING Ning1, YUE Jinsong1, XU Rongsheng1

1.School of Chemistry and Chemical Engineering， North Minzu University， Yinchuan  750021 ， Ningxia ， China;2.Ningxia Key Laboratory of Solar Chemical Conversion Technology， North Minzu University， Yinchuan  750021 ， Ningxia ， China;3.Key Laboratory for Chemical Engineering and Technology， State Ethnic Affairs Commission， North Minzu University， Yinchuan  750021 ， Ningxia ， China

Abstract:Abstract：In order to study the Influence of ionic liquids/NMP on the structure and extraction performance of Shuangma 's extraction residue ， the Ningdong Shuangma coal（ SM ） was fractional extracted with ethanol and acetone to obtain residue coal（SMEC） ， and then the SMEC was extracted by mixed solvent of different types of ionic liquids（ lLs ） and N-methylpyrrolidone（ NMP）. The changes of thermal decomposition characteristics of coal samples before and after extraction by ILs/NMP were studied through TG ， the changes of functional groups of coal samples before and after extraction by ILs/NMP were studied through FT-IR ， and the types of extract were analyzed by GC/MS. The results showed that the thermal weight loss of the coal samples increased and the content of oxygen-containing functional groups in the residues decreased after ILs/NMP extraction. In addition ， the extraction rate of hydrophobic ionic liquids/NMP to SMEC coal was greater than that of hydrophilic ionic liquids/NMP. The hydrophilic ionic liquid［Bmim］Cl/NMP and［Bmim］BF₄/NMPextracted 51 kind sand 44 kinds of organic substances ， respectively. Hydrophobic lonic liquids［ Bmim ］NTf₂/NMP and ［Bmim］PF₆/NMP extracted 28 and 29 organic substances ， respectively. Hydrophobic ionic liquids/NMP had stronger extraction ability for oxygen-containing functional compounds in SMEC coal than hydrophilic ionic liquids/NMP； Hydrophobic ionic liquids/NMP had lower extraction ability for heteroatom-containing compounds in SMEC coal than hydrophilic ionic liquids/NMP.

Key words:residue coal;fractional extraction;organic matter;hydrophilic ionic liquid;hydrophobic ionic liquid

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