Physical and chemical behavior of liquefied coal in solids separation. Quarterly report, April-June 1979

Technical Report · Sun Jul 01 04:00:00 EDT 1979

OSTI ID:5757448

Briggs, D E; Cameron, J R; Islip, P; Smith, P A.S.; Ho, B; Romine, J C

A technique was perfected for precipitating organic bases from THF solutions with phosphotungstic and phosphomolybdic acids. The procedure can be used to isolate the basic fraction of preasphaltenes. Nitrogen heterocycles can be removed from Deno oxidation products by formation and precipitation of the Reineckate salt of aromatic amines from aqueous acid solutions. The procedure was used to remove the heterocycles prior to esterification. BF/sub 3/ catalyzed esterification gave reproducible results on several coal derived liquids. The compressibility of filter cake produced from the filtration of H-Coal product oil was 1.14 compared to 0.55 when Soltrol 130 is added to give a slurry concentration of 20 wt % Soltrol 130 prior to filtration at 232/sup 0/C. Small angle x-ray scattering experiments with GPC fractionated asphaltene samples indicate that the colloidal state of the asphaltene solution depends upon the nature of the homogeneous phase. For a high heteroatom content fraction in pyridine at 10 wt %, the micelles exist as a nominally monodisperse system with a radius of gyration of 14.8 A. In a mixture of 90 wt % tetralin, 2.5 wt % m-cresol and 7.5 wt % ..cap alpha..-picoline at a concentration of 10 wt %, the same fraction is a polydisperse system with 98.5 of the micelles having a radius of gyration of 6.61 A and 1.50 wt % having a radius of gyration of 41.8 A or greater. An oil and resin fraction from the liquefaction of an Illinois No. 6 coal in the H-Coal process was subjected to oscillatory testing with the Weissenberg rheogoniometer to determine the viscoelastic properties of the fraction.

• Research Organization: Michigan Univ., Ann Arbor (USA). Dept. of Chemical Engineering
• DOE Contract Number: AS01-76ET10550
• OSTI ID: 5757448
• Report Number(s): DOE/ET/10550-T3; FE-2550-11; ON: DE82004541
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405 -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600* -- Coal
Lignite
& Peat-- Properties & Composition
AROMATICS
ASPHALTENES
ASPHALTS
AZINES
BASES
BITUMENS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMATOGRAPHY
COAL LIQUEFACTION
COAL LIQUIDS
CRESOLS
DATA
ESTERIFICATION
EXPERIMENTAL DATA
FILTRATION
FLUIDS
FRACTIONATION
FURANS
H-COAL PROCESS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROXY COMPOUNDS
INFORMATION
LIQUEFACTION
LIQUIDS
NONDESTRUCTIVE ANALYSIS
NUMERICAL DATA
OILS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
OXIDATION
PETROCHEMICALS
PETROLEUM PRODUCTS
PHENOLS
PICOLINES
POLYMERS
PRECIPITATION
PYRIDINES
RADIATION SCATTERING ANALYSIS
REMOVAL
RESEARCH PROGRAMS
RESINS
SEPARATION PROCESSES
TAR
TETRAHYDROFURAN
TETRALIN
THERMOCHEMICAL PROCESSES
VISCOSITY