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

Title: Hydrothermal pretreatment to prevent scale during liquefaction of certain solid carbonaceous materials

Abstract

Scale formation during the liquefaction of lower ranking coals and similar carbonaceous materials is significantly reduced and/or prevented by hydrothermal pretreatment. The said pretreatment is believed to convert the scale-forming components to the corresponding carbonate prior to liquefaction. The said pretreatment is accomplished at a total pressure within the range from about 1000 to about 4400 psia. Temperature during said pretreatment will generally be within the range from about 500.degree. to about 700.degree. F.

Inventors:
 [1];  [2]
  1. (Houston, TX)
  2. (Baytown, TX)
Issue Date:
Research Org.:
Exxon Research and Engineering Co. (Florham Park, NJ)
OSTI Identifier:
865016
Patent Number(s):
4450066
Assignee:
Exxon Research and Engineering Co. (Florham Park, NJ) HQPR
DOE Contract Number:  
FC01-77ET10069
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
hydrothermal; pretreatment; prevent; scale; liquefaction; solid; carbonaceous; materials; formation; ranking; coals; similar; significantly; reduced; prevented; believed; convert; scale-forming; components; corresponding; carbonate; prior; accomplished; total; pressure; range; 1000; 4400; psia; temperature; 500; degree; 700; scale formation; significantly reduce; scale-forming components; ranking coals; total pressure; carbonaceous materials; carbonaceous material; solid carbonaceous; significantly reduced; similar carbonaceous; solid carbon; prevent scale; corresponding carbonate; /208/

Citation Formats

Stone, John B., and Floyd, Frank M. Hydrothermal pretreatment to prevent scale during liquefaction of certain solid carbonaceous materials. United States: N. p., 1984. Web.
Stone, John B., & Floyd, Frank M. Hydrothermal pretreatment to prevent scale during liquefaction of certain solid carbonaceous materials. United States.
Stone, John B., and Floyd, Frank M. Sun . "Hydrothermal pretreatment to prevent scale during liquefaction of certain solid carbonaceous materials". United States. https://www.osti.gov/servlets/purl/865016.
@article{osti_865016,
title = {Hydrothermal pretreatment to prevent scale during liquefaction of certain solid carbonaceous materials},
author = {Stone, John B. and Floyd, Frank M.},
abstractNote = {Scale formation during the liquefaction of lower ranking coals and similar carbonaceous materials is significantly reduced and/or prevented by hydrothermal pretreatment. The said pretreatment is believed to convert the scale-forming components to the corresponding carbonate prior to liquefaction. The said pretreatment is accomplished at a total pressure within the range from about 1000 to about 4400 psia. Temperature during said pretreatment will generally be within the range from about 500.degree. to about 700.degree. F.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {1}
}

Patent:

Save / Share: