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Comparison by g.c.-m.s. of liquefaction extracts from coal maceral concentrates


Publisher
Elsevier Science
Year
1995
Weight
178 KB
Volume
36
Category
Article
ISSN
0140-6701

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Quantitative analysis of N-methyl-2-pyrr
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N-methyl-2-pyrrolidinone (NMP) is widely used for coal extractions. It is well known that extraction solvents are retained in the coal extracts even after extensive drying procedures. The amount of NMP retained will affect the accuracy of the extraction yield and the character of the extracts. Therm