Coagulation and filtration of solids from liquefied coal of SYNTHOIL process. [10 refs]

Conference · Thu Jan 01 04:00:00 EST 1976 · Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States)

OSTI ID:7336561

Newman, J O.H.; Akhtar, S; Yavorsky, P M

In the SYNTHOIL process for converting coal to a low-sulfur, low-ash fuel oil, coal is liquefied and hydrodesulfurized catalytically by reaction with hydrogen in a turbulent-flow, packed-bed reactor. The gross liquid product is then centrifuged, or filtered, to remove unreacted coal and mineral matter. The de-ashed liquid is a low-sulfur, low-ash fuel oil. It has now been demonstrated that the removal of solids can be facilitated by adding accumulated process-derived light oil to the gross liquid product and heating the mixture at 105 to 115/sup 0/C under a reflux condenser. This coagulates the finely dispersed solids which are then more amenable to filtration. Samples of the gross liquid product containing 4.7 percent ash were thus filtered to oils containing less than 0.1 percent ash. The necessary amount of light oil inventory is recovered by distillation and recycled to treat more gross liquid product for filtration. The light oil contained 44 percent C/sub 5/-C/sub 16/ saturates which may be responsible for anti-solvent or agglomerating action on the ash-containing residual coal particles.

• Research Organization: Pittsburgh Energy Research Center
• OSTI ID: 7336561
• Conference Information: Journal Name: Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States) Journal Volume: 21:5
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010403 -- Coal & Coal Products-- Hydrogenation-- (-1987)
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
AGGLOMERATION
ASHES
CARBONACEOUS MATERIALS
CENTRIFUGATION
CHEMICAL REACTIONS
COAL
COAL LIQUEFACTION
COAL LIQUIDS
DESULFURIZATION
ELEMENTS
ENERGY SOURCES
FILTRATION
FLOCCULATION
FLUID FLOW
FOSSIL FUELS
FUEL OILS
FUELS
HYDROGENATION
LIQUEFACTION
NONMETALS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PRECIPITATION
REMOVAL
RESIDUES
SEPARATION PROCESSES
SULFUR
SYNTHOIL PROCESS
TURBULENT FLOW