Separation of mixtures of bituminous coal and lower rank coal by

Details Separation of mixtures of bituminous coal and lower rank coal by Separation of mixtures of bituminous coal and lower rank coal by

1983-11-14

1986-12-23

Rosenbaum, Mark

Solid material comminution or disintegration

Processes

241 14, 241 24, B02C 1900

Patent

active

046307788

ABSTRACT:
Method for separating a mixture of bituminous coal and a lower rank coal such as subbituminous, lignite, and mixtures thereof, comprising contacting the coal mixture with an effective amount of an aqueous chemical comminuting solution for a sufficient time to selectively comminute a substantial portion of one of the ranks of coal in the mixture. Thereafter, the comminuted coal and noncomminuted coal of different rank is separated from the chemical comminuting solution. The smaller comminuted coal particles of one rank are then separated from the larger noncomminuted coal of the other rank by screening. Substantially anhydrous methanol or an aqueous methanol solution is used to selectively comminute the bituminous rank coal whereas an aqueous alkaline solution, preferably aqueous sodium hydroxide, is used to selectively comminute the lower rank coal.

REFERENCES:
patent: 2189711 (1940-02-01), Eigenbrot
patent: 2842319 (1958-07-01), Reerink et al.
patent: 3815826 (1974-06-01), Aldrich et al.

Affiliated with

Also associated with

Rating

Separation of mixtures of bituminous coal and lower rank coal by does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Separation of mixtures of bituminous coal and lower rank coal by, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Separation of mixtures of bituminous coal and lower rank coal by will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-167680