Chemical comminution and deashing of low-rank coals

Details Chemical comminution and deashing of low-rank coals Chemical comminution and deashing of low-rank coals

1989-09-26

1992-12-01

Walsh, Donald P.

Fuel and related compositions

Coal treating process or product thereof

44624, 44626, C10L 900

Patent

active

H00011185

ABSTRACT:
A method of chemically comminuting a low-rank coal while at the same time increasing the heating value of the coal. A strong alkali solution is added to a low-rank coal to solubilize the carbonaceous portion of the coal, leaving behind the noncarbonaceous mineral matter portion. The solubilized coal is precipitated from solution by a multivalent cation, preferably calcium.

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Quigley et al., "Evidence that Microbially Produced Alkaline Materials are Involved in Coal Biosolubilization", Applied Biochemistry and Biotechnology, vol. 20/21, 1989.

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