EXTRACTION OF COALS WITH CS2-N-METHYL-2-PYRROLIDINONE MIXED-SOLVENT AT ROOM-TEMPERATURE - EFFECT OF COAL RANK AND SYNERGISM OF THE MIXED-SOLVENT
EXTRACTION OF COALS WITH CS2-N-METHYL-2-PYRROLIDINONE MIXED-SOLVENT AT ROOM-TEMPERATURE - EFFECT OF COAL RANK AND SYNERGISM OF THE MIXED-SOLVENT
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DOI：
10.1016/0016-2361(88)90208-6
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发表时间：
1988-12-01
期刊：
影响因子：
7.4
通讯作者：
TODA, K
中科院分区：
文献类型：
--
作者：
IINO, M;TAKANOHASHI, T;TODA, K
在室温下，用CS_2-N-甲基-2-吡咯烷酮（MP）混合溶剂（体积比1：1）对煤（从褐煤到无烟煤）进行了萃取。在所考察的49种烟煤（C%76.9- 90.6%daf）中，有29种获得了30-66%（daf）的高产率。无烟煤、次烟煤和褐煤的产率不高。原煤、萃取物和残渣的表征结果表明，在萃取过程中，煤和溶剂之间的反应不会发生到显著的程度。与单独使用CS_2和MP相比，混合溶剂的协同效应，即产率和速率的大幅度增加已被解释为增加了萃取物的溶解性和扩散性，并增加了煤在混合溶剂中的溶胀。CS2与喹啉、吡啶和THF的混合溶剂的萃取率低于CS2与MP的混合溶剂。
Coals (from lignite to anthracite) were extracted at room temperature with CS2-N-methyl-2-pyrrolidinone (MP) mixed solvent (1:1 by volume), which was found to be a very efficient solvent for the extraction of bituminous coals in a previous study. High yields of 30–66% (daf) were obtained for 29 of the 49 bituminous coals (C%76.9–90.6% daf) examined. The anthracite, subbituminous coals and lignites did not give high yields. The results of the characterization of the raw coals, extracts and residues suggest that reactions between the coals and the solvents do not occur to a significant extent during the extraction. The synergistic effect, i.e. the large increase in yield and rate for the mixed solvent compared with those for CS2and MP alone has been explained by increasing solubility and diffusibility of the extracts and increasing swelling of the coals, in the mixed solvent. The mixed solvents of CS2with quinoline, pyridine and THF gave lower extraction yields than the CS2-MP mixed solvent.