Campus Units

Chemical and Biological Engineering

Document Type

Book Chapter

Publication Version

Published Version

Publication Date

1986

Journal or Book Title

Mineral Matter and Ash in Coal

Volume

301

First Page

462

Last Page

472

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

Share

COinS