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Title: Conditioning of carbonaceous material prior to physical beneficiation

Abstract

A carbonaceous material such as coal is conditioned by contact with a supercritical fluid prior to physical beneficiation. The solid feed material is contacted with an organic supercritical fluid such as cyclohexane or methanol at temperatures slightly above the critical temperature and pressures of 1 to 4 times the critical pressure. A minor solute fraction is extracted into critical phase and separated from the solid residuum. The residuum is then processed by physical separation such as by froth flotation or specific gravity separation to recover a substantial fraction thereof with reduced ash content. The solute in supercritical phase can be released by pressure reduction and recombined with the low-ash, carbonaceous material.

Inventors:
 [1];  [2]
  1. Venetia, PA
  2. McMurray, PA
Issue Date:
Research Org.:
USDOE Pittsburgh Energy Technology Center (PETC), PA (United States)
OSTI Identifier:
866369
Patent Number(s):
4695372
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10G - CRACKING HYDROCARBON OILS
C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10L - FUELS NOT OTHERWISE PROVIDED FOR
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
conditioning; carbonaceous; material; prior; physical; beneficiation; coal; conditioned; contact; supercritical; fluid; solid; feed; contacted; organic; cyclohexane; methanol; temperatures; slightly; critical; temperature; pressures; times; pressure; minor; solute; fraction; extracted; phase; separated; residuum; processed; separation; froth; flotation; specific; gravity; recover; substantial; reduced; ash; content; released; reduction; recombined; low-ash; material prior; physical separation; pressure reduction; substantial fraction; specific gravity; feed material; critical temperature; supercritical fluid; carbonaceous material; ash content; froth flotation; reduced ash; critical pressure; solid feed; fluid prior; physical beneficiation; /208/209/

Citation Formats

Warzinski, Robert P, and Ruether, John A. Conditioning of carbonaceous material prior to physical beneficiation. United States: N. p., 1987. Web.
Warzinski, Robert P, & Ruether, John A. Conditioning of carbonaceous material prior to physical beneficiation. United States.
Warzinski, Robert P, and Ruether, John A. Thu . "Conditioning of carbonaceous material prior to physical beneficiation". United States. https://www.osti.gov/servlets/purl/866369.
@article{osti_866369,
title = {Conditioning of carbonaceous material prior to physical beneficiation},
author = {Warzinski, Robert P and Ruether, John A},
abstractNote = {A carbonaceous material such as coal is conditioned by contact with a supercritical fluid prior to physical beneficiation. The solid feed material is contacted with an organic supercritical fluid such as cyclohexane or methanol at temperatures slightly above the critical temperature and pressures of 1 to 4 times the critical pressure. A minor solute fraction is extracted into critical phase and separated from the solid residuum. The residuum is then processed by physical separation such as by froth flotation or specific gravity separation to recover a substantial fraction thereof with reduced ash content. The solute in supercritical phase can be released by pressure reduction and recombined with the low-ash, carbonaceous material.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

Patent:

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