EP 0060354 A1 19820922 - Method of treating coal to remove sulphur and ash.
Title (en)
Method of treating coal to remove sulphur and ash.
Title (de)
Verfahren zum Entfernen von Schwefel und Asche aus Kohle.
Title (fr)
Procédé d'élimination du soufre et des cendres de charbon.
Publication
Application
Priority
EP 81301043 A 19810312
Abstract (en)
The present invention is directed to an improved method of chemically treating coal to remove sulfur and ash. It is especially adapted for use on high sulfur, refuse coal. In practice the coal is treated with hydrochloric acid and hypochlorous acid in the presence of ferric and ferrous sulfate to convert the iron pyrites to other sulfur compounds. These are then converted to various salts of calcium through neutralization with lime.
IPC 1-7
IPC 8 full level
C10L 9/02 (2006.01)
CPC (source: EP)
C10L 9/02 (2013.01)
Citation (search report)
- US 4006080 A 19770201 - TWIST WALTER, et al
- DE 670964 C 19390128 - DEUTSCHE ERDOEL AG
- US 3998604 A 19761221 - HINKLEY DAVID WILLIAM
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0060354 A1 19820922; EP 0060354 B1 19850731; DE 3171535 D1 19850905
DOCDB simple family (application)
EP 81301043 A 19810312; DE 3171535 T 19810312