skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Process for coal liquefaction in staged dissolvers

Abstract

There is described an improved liquefaction process by which coal is converted to a low ash and low sulfur carbonaceous material that can be used as a fuel in an environmentally acceptable manner without costly gas scrubbing equipment. In the process, coal is slurried with a pasting oil, passed through a preheater and at least two dissolvers in series in the presence of hydrogen-rich gases at elevated temperatures and pressures. Solids, including mineral ash and unconverted coal macerals, are separated from the condensed reactor effluent. In accordance with the improved process, the first dissolver is operated at a higher temperature than the second dissolver. This temperature sequence produces improved product selectivity and permits the incorporation of sufficient hydrogen in the solvent for adequate recycle operations.

Inventors:
 [1];  [2];  [3]
  1. (Emmaus, PA)
  2. (Bethlehem, PA)
  3. (Allentown, PA)
Issue Date:
Research Org.:
INTERNATIONAL COAL REFINING CO
OSTI Identifier:
864805
Patent Number(s):
4421630
Assignee:
International Coal Refining Company (Allentown, PA) OSTI
DOE Contract Number:  
AC05-78OR03054
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
process; coal; liquefaction; staged; dissolvers; described; improved; converted; ash; sulfur; carbonaceous; material; fuel; environmentally; acceptable; manner; costly; gas; scrubbing; equipment; slurried; pasting; oil; passed; preheater; series; presence; hydrogen-rich; gases; elevated; temperatures; pressures; solids; including; mineral; unconverted; macerals; separated; condensed; reactor; effluent; accordance; dissolver; operated; temperature; sequence; produces; product; selectivity; permits; incorporation; sufficient; hydrogen; solvent; adequate; recycle; operations; unconverted coal; reactor effluent; improved process; elevated temperatures; liquefaction process; elevated temperature; coal liquefaction; carbonaceous material; gas scrubbing; rich gas; product selectivity; coal macerals; mineral ash; hydrogen-rich gas; environmentally acceptable; improved liquefaction; staged dissolvers; sulfur carbonaceous; hydrogen-rich gases; improved product; including mineral; acceptable manner; /208/

Citation Formats

Roberts, George W., Givens, Edwin N., and Skinner, Ronald W. Process for coal liquefaction in staged dissolvers. United States: N. p., 1983. Web.
Roberts, George W., Givens, Edwin N., & Skinner, Ronald W. Process for coal liquefaction in staged dissolvers. United States.
Roberts, George W., Givens, Edwin N., and Skinner, Ronald W. Sat . "Process for coal liquefaction in staged dissolvers". United States. https://www.osti.gov/servlets/purl/864805.
@article{osti_864805,
title = {Process for coal liquefaction in staged dissolvers},
author = {Roberts, George W. and Givens, Edwin N. and Skinner, Ronald W.},
abstractNote = {There is described an improved liquefaction process by which coal is converted to a low ash and low sulfur carbonaceous material that can be used as a fuel in an environmentally acceptable manner without costly gas scrubbing equipment. In the process, coal is slurried with a pasting oil, passed through a preheater and at least two dissolvers in series in the presence of hydrogen-rich gases at elevated temperatures and pressures. Solids, including mineral ash and unconverted coal macerals, are separated from the condensed reactor effluent. In accordance with the improved process, the first dissolver is operated at a higher temperature than the second dissolver. This temperature sequence produces improved product selectivity and permits the incorporation of sufficient hydrogen in the solvent for adequate recycle operations.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {1}
}

Patent:

Save / Share: