By Richard & Bernard D. Blaustein, eds. Markuszewski
Publication by means of Marhuszewski, Richard and Bernard Blaustein, Eds
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Additional info for Fossil Fuels Utilization. Environmental Concerns
In several instances, the total sulfur content of Iowa or I l l i n o i s coal treated by the a l k a l i n e leaching step alone was below the apparent organic s u l f u r content of the raw c o a l , i n d i c a t i n g organic sulfur removal as well as inorganic sulfur removal, but usually the apparent reduction in organic s u l f u r content was s l i g h t and may not have been s i g n i f i c a n t . ch003 e e 3 3 Acknowledgments This work was supported by the Assistant Secretary for Fossil Energy, Division of Coal Utilization, through the Pittsburgh Energy Technol ogy Center.
300 to 308ym). Table 1 . Molar Extinction C o e f f i c i e n t s of Viscose Compounds ( 1 0 ) Wavelength Compounds Sodium c e l l u l o s e xanthate Sodium c e l l u l o s e dixanthogen Sodium d i t h i o carbonate Sodium t r i t h i o carbonate Sodium s u l f i d e Carbon d i s u l f i d e 336ym 303um 250um 226um 17508 10928 6862 12396 600 18200 272um 10500 206um 3250 3hk0 I69O 12230 7730 60,00070,000 Xanthates are usually formed by reacting an alcohol or a raw material containing alcoholic hydroxyl groups with an a l k a l i and carbon d i s u l f i d e ( 1 0 ) .
Selective F l o c c u l a t i o n of High Sulfur Coals Preliminary t e s t i n g of the unpurified polyxanthate dispersant mentioned e a r l i e r , during the s e l e c t i v e f l o c c u l a t i o n of three high s u l f u r coals, is described here. The coal samples used for the study were Kentucky No. 9 , Meigs Creek, and Ohio No. 6 . The coal samples were wet ground in a s t e e l b a l l m i l l and screened to obtain the minus UOO mesh (-37pm) f r a c t i o n f o r t e s t i n g in the case of Kentucky No.