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:
-
- Slater, IA
- Socorro, NM
- Houston, TX
- Ames, IA
- Issue Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA; Iowa State Univ., Ames, IA (United States)
- OSTI Identifier:
- 867084
- Patent Number(s):
- 4859212
- Application Number:
- 07/244,991
- Assignee:
- Iowa State University Research Foundation, Inc. (Ames, IA)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10L - FUELS NOT OTHERWISE PROVIDED FOR
- 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 = {Tue Aug 22 00:00:00 EDT 1989},
month = {Tue Aug 22 00:00:00 EDT 1989}
}
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