CO.sub.2 Pretreatment prevents calcium carbonate formation
Abstract
Scale formation during the liquefaction of lower ranking coals and similar carbonaceous materials is significantly reduced and/or prevented by pretreatment with carbon dioxide. The carbon dioxide pretreatment is believed to convert the scale-forming components to the corresponding carbonate prior to liquefaction. The pretreatment is accomplished at a total pressure within the range from about 14 to about 68 atmospheres and a carbon dioxide partial pressure within the range from about 14 to about 34 atmospheres. Temperature during pretreatment will generally be within the range from about 100.degree. to about 200.degree. C.
- Inventors:
-
- Baytown, TX
- Buffalo Grove, IL
- Worthington, OH
- Issue Date:
- OSTI Identifier:
- 863593
- Patent Number(s):
- 4206033
- Assignee:
- Exxon Research & Engineering Co. (Florham Park, NJ)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10G - CRACKING HYDROCARBON OILS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- DOE Contract Number:
- E(49-18)-2353
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- pretreatment; prevents; calcium; carbonate; formation; scale; liquefaction; ranking; coals; similar; carbonaceous; materials; significantly; reduced; prevented; carbon; dioxide; believed; convert; scale-forming; components; corresponding; prior; accomplished; total; pressure; range; 14; 68; atmospheres; partial; 34; temperature; 100; degree; 200; scale formation; significantly reduce; scale-forming components; ranking coals; total pressure; carbonaceous materials; carbon dioxide; carbonaceous material; partial pressure; calcium carbonate; significantly reduced; similar carbonaceous; carbonate formation; corresponding carbonate; /208/
Citation Formats
Neavel, Richard C, Brunson, Roy J, and Chaback, Joseph J. CO.sub.2 Pretreatment prevents calcium carbonate formation. United States: N. p., 1980.
Web.
Neavel, Richard C, Brunson, Roy J, & Chaback, Joseph J. CO.sub.2 Pretreatment prevents calcium carbonate formation. United States.
Neavel, Richard C, Brunson, Roy J, and Chaback, Joseph J. Tue .
"CO.sub.2 Pretreatment prevents calcium carbonate formation". United States. https://www.osti.gov/servlets/purl/863593.
@article{osti_863593,
title = {CO.sub.2 Pretreatment prevents calcium carbonate formation},
author = {Neavel, Richard C and Brunson, Roy J and Chaback, Joseph J},
abstractNote = {Scale formation during the liquefaction of lower ranking coals and similar carbonaceous materials is significantly reduced and/or prevented by pretreatment with carbon dioxide. The carbon dioxide pretreatment is believed to convert the scale-forming components to the corresponding carbonate prior to liquefaction. The pretreatment is accomplished at a total pressure within the range from about 14 to about 68 atmospheres and a carbon dioxide partial pressure within the range from about 14 to about 34 atmospheres. Temperature during pretreatment will generally be within the range from about 100.degree. to about 200.degree. C.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1980},
month = {Tue Jan 01 00:00:00 EST 1980}
}
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