Method to upgrade low rank coal stocks

Details Method to upgrade low rank coal stocks Method to upgrade low rank coal stocks

2006-10-31

2006-10-31

Toomer, Cephia D. (Department: 1714)

Fuel and related compositions

Coal treating process or product thereof

C044S280000, C044S281000, C044S282000, C048S202000

Reexamination Certificate

active

07128767

ABSTRACT:
The ash content of raw coals, lignite, and other carbonaceous materials is reduced by leaching the high-ash material with an aqueous acidic waste product produced by a Fischer-Tropsch reaction. The acidic aqueous waste is mixed with coal and process conditions are described. The claim takes advantage of using otherwise uneconomic coal, lignite or other carbonaceous material by upgrading the material to a suitable feedstock for combustion in a power plant or gasifier.

REFERENCES:
patent: 3996026 (1976-12-01), Cole
patent: 4214875 (1980-07-01), Kromrey
patent: 4331445 (1982-05-01), Burns
patent: 4331446 (1982-05-01), Draper et al.
patent: 4389218 (1983-06-01), Pike
patent: 4417902 (1983-11-01), Yaghmaie et al.
patent: 4670058 (1987-06-01), Mark
patent: 4783198 (1988-11-01), Hueschen
patent: 4904277 (1990-02-01), Najjar et al.
patent: 5033230 (1991-07-01), Kennepohl et al.
patent: 5071447 (1991-12-01), Koppelman
patent: 5324336 (1994-06-01), Child
patent: 5815946 (1998-10-01), Dean
patent: 6068760 (2000-05-01), Benham et al.
patent: 6313361 (2001-11-01), Waycuilis
patent: 6533945 (2003-03-01), Shah
patent: 6664302 (2003-12-01), French et al.

Affiliated with

Also associated with

Rating

Method to upgrade low rank coal stocks does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method to upgrade low rank coal stocks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method to upgrade low rank coal stocks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3716083