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Title: 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 175.degree. to 350.degree. 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
Research Org:
BUREAU OF MINES
Country of Publication:
United States
Language:
English
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/