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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 4, Number 1
February 20, 1957 

Studies on the Cation Exchangers from Coals

탄질량이온교환체제조에 관한 연구
Bum Soon Lee, In Sang Yoo

이범순, 유인상
With the intention of preparing cation exchangers from the domestic coals, and using these for softening hard water and some other purposes, seven kinds of raw coal were tested and the results are as follows. 1) The following conditions of preparation were given the good results. Reaction time 5 hours Reaction temperature 95℃ Concentration of sulfuric acid 98% Amount of sulfuric acid 10 times to the sample (as weight) 2) The raw coals which is rich in fixed carbon and have the fuel ratio 0.8 to 1.0 were suitable, and Kampo lignite has shown the best results. 3) The cation exchangers from coals were able to exchange the cation, both hydrogen and sodium type dynamically and statically, like the synthetic ion exchange resin. The exchange capacities were as follows. Total capacity 1.60 meq/g. Breakthrough capacity 1.30 meq/g. Usable breakthrough capacity 1.20 meq/g
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