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Behavior of Quartz, Kaolinite, and Pyrite during Alkaline Leaching of Coal
Mineral Matter and Ash in Coal
  • C.W. Fan, Iowa State University
  • Richard Markuszewski, Iowa State University
  • Thomas D. Wheelock, Iowa State University
Document Type
Book Chapter
Publication Version
Published Version
Publication Date
1-1-1986
DOI
10.1021/bk-1986-0301.ch034
Abstract

Most of the mineral matter was extracted from Illinois No. 6 coal, a representative bituminous coal, by first leaching it with a hot alkaline solution and then with a dilute mineral acid. The alkalis employed, in decreasing effectiveness, were: (1) NaOH, (2) Na2CO3, (3) NaHCO3. The results generally agreed with those obtained in leaching quartz, kaolinite, and iron pyrite individually under similar conditions. The quartz was solubilized by the stronger alkalis. Kaolinite was largely converted to sodium hydroaluminosilicates such as analcime, hydroxycancrinite, and natrodavyne. A portion of the iron pyrite was converted to hematite, the amount depending on alkali strength and temperature. The sodium hydroaluminosilicates and hematite were subsequently extracted by acid.

Comments

Reprinted (adapted) with permission from Mineral Matter and Ash in Coal, Chapter 34, pp 462–472. Copyright 1986 American Chemical Society.

Copyright Owner
American Chemical Society
Language
en
File Format
application/pdf
Citation Information
C.W. Fan, Richard Markuszewski and Thomas D. Wheelock. "Behavior of Quartz, Kaolinite, and Pyrite during Alkaline Leaching of Coal" Mineral Matter and Ash in Coal Vol. 301 (1986) p. 462 - 472
Available at: http://works.bepress.com/thomas-wheelock/28/