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Title: Removal of mineral matter including pyrite from coal

Removal of mineral matter including pyrite from coal Mineral matter, including pyrite, is removed from coal by treatment of the coal with aqueous alkali at a temperature of about to C, followed by acidification with strong acid.
Authors: ; ;
Publication Date:
OSTI Identifier:862704
Report Number(s):US 3993455
US patent application 05/354,023
Resource Type:Patent
Data Type:
Country of Publication:United States
Subject: removal; mineral; matter; including; pyrite; coal; mineral; matter; including; pyrite; removed; coal; treatment; coal; aqueous; alkali; temperature; 175; degree; 350; degree; followed; acidification; strong; acid; strong acid; aqueous alkali; mineral matter; mineral matter; coal mineral; matter including; coal mine; including pyrite; including pyrite /44/201/423/