Solvent extraction of solvent-refined coal (SRC-II) liquids
Solvent extraction of solvent-refined coal ((SRC-II)) liquids to remove heteroatoms that make the coal liquids unsuitable as a refinery feed for gasoline production was studied experimentally by Suntech Inc. for the U.S. Department of Energy. The distribution coefficients of the heteroatom compounds present in coal liquids of different boiling points were determined, to evaluate extraction for the maximum removal of these compounds from the total SRC-II liquid and to prepare raffinates and extracts for hydrotreatment studies. The results indicated that the distribution coefficients for the different types of heteroatom compounds in coal liquids decrease with increasing boiling point. The selectivity of N,N'-dimethylformamide (DMF)/heptane solvent systems for phenolic compounds relative to nitrogen compounds was found to be greater than that of aqueous methanol. Extraction of only approx. 15% of the coal liquids with 8:1 by vol DMF/heptane produced a raffinate that was subsequently hydrodenitrogenated at 6-7 times the denitrogenation rate with the original coal liquid. Milder hydrotreatment of the raffinate eliminates nitrogen compounds with less hydrogenation of the aromatics, and yields an excellent catalytic-cracking charge stock.
- Research Organization:
- Suntech Inc.
- OSTI ID:
- 6378640
- Report Number(s):
- CONF-800610-
- Journal Information:
- AIChE Pap.; (United States), Journal Name: AIChE Pap.; (United States) Vol. 58B; ISSN AICPA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Research and development of an advanced process for the conversion of coal to synthetic gasoline and other distillate fuels. Quarterly technical progress report No. 12, for the period October 1980-December 1980. Draft. [Dimethylformamide-heptane; methanol]
Research and development of an advanced process for the conversion of coal to synthetic gasoline and other distillate fuels. Quarterly technical progress report No. 9, April 1979-June 1979
Related Subjects
010407* -- Coal & Coal Products-- Solvent Extraction-- (-1987)
ALCOHOLS
ALKANES
AMIDES
AQUEOUS SOLUTIONS
AROMATICS
BOILING POINTS
CATALYTIC CRACKING
CHEMICAL FEEDSTOCKS
CHEMICAL REACTIONS
COAL LIQUEFACTION
COAL LIQUIDS
CRACKING
DATA
DECOMPOSITION
DENITRIFICATION
DISPERSIONS
EVALUATION
EXPERIMENTAL DATA
EXTRACTION
FLUIDS
FUELS
GASOLINE
HEPTANE
HYDROCARBONS
HYDROGENATION
HYDROXY COMPOUNDS
INFORMATION
LIQUEFACTION
LIQUID FUELS
LIQUIDS
METHANOL
MIXED SOLVENTS
MIXTURES
NATIONAL ORGANIZATIONS
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SOLVENTS
PETROLEUM PRODUCTS
PHENOLS
PHYSICAL PROPERTIES
PROCESSING
PRODUCTION
PYROLYSIS
REFINING
REMOVAL
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SOLVENTS
SRC-II PROCESS
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
US DOE
US ORGANIZATIONS
USES