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Title: Chemical cleaning of coal by molten caustic leaching after pretreatment by low-temperature devolatilization

Abstract

Pretreatment of coal by devolatization at temperatures ranging from about 420.degree. C. to about 450.degree. C. for from about 10 minutes to about 30 minutes before leaching with molten caustic leads to a significant reduction in carbonate formation, greatly reducing the cost of cleaning coal on a per ton basis.

Inventors:
 [1];  [2];  [3];  [4]
  1. (Slater, IA)
  2. (Socorro, NM)
  3. (Houston, TX)
  4. (Ames, IA)
Issue Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)
OSTI Identifier:
867084
Patent Number(s):
4859212
Application Number:
07/244,991
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA) AMES
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
chemical; cleaning; coal; molten; caustic; leaching; pretreatment; low-temperature; devolatilization; devolatization; temperatures; ranging; 420; degree; 450; 10; minutes; 30; leads; significant; reduction; carbonate; formation; greatly; reducing; cost; ton; basis; significant reduction; temperatures ranging; molten caustic; greatly reducing; caustic leaching; carbonate formation; /44/423/

Citation Formats

Chriswell, Colin D., Kaushik, Surender M., Shah, Navin D., and Markuszewski, Richard. Chemical cleaning of coal by molten caustic leaching after pretreatment by low-temperature devolatilization. United States: N. p., 1989. Web.
Chriswell, Colin D., Kaushik, Surender M., Shah, Navin D., & Markuszewski, Richard. Chemical cleaning of coal by molten caustic leaching after pretreatment by low-temperature devolatilization. United States.
Chriswell, Colin D., Kaushik, Surender M., Shah, Navin D., and Markuszewski, Richard. Tue . "Chemical cleaning of coal by molten caustic leaching after pretreatment by low-temperature devolatilization". United States. https://www.osti.gov/servlets/purl/867084.
@article{osti_867084,
title = {Chemical cleaning of coal by molten caustic leaching after pretreatment by low-temperature devolatilization},
author = {Chriswell, Colin D. and Kaushik, Surender M. and Shah, Navin D. and Markuszewski, Richard},
abstractNote = {Pretreatment of coal by devolatization at temperatures ranging from about 420.degree. C. to about 450.degree. C. for from about 10 minutes to about 30 minutes before leaching with molten caustic leads to a significant reduction in carbonate formation, greatly reducing the cost of cleaning coal on a per ton basis.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {8}
}

Patent:

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