Process of preparing a donor solvent for coal liquefaction

Patent · Tue May 05 00:00:00 EDT 1987

OSTI ID:6392941

Ditman, J G; Ditman, R D

A process is described for preparing a hydrogen donor solvent having a high concentration of higher molecular weight polycyclic aromatic and heterocyclic compounds suitable for use in coal liquefaction comprising: distilling liquefied coal to separate the coal into a fraction having a boiling point less than about 350/sup 0/F and a residue having a boiling point greater than about 350/sup 0/F; deasphalting the residue from the distillation in a first solvent capable of substantially extracting from the residue a high hydrogen to carbon ratio first oil comprising lower molecular weight compounds and saturated compounds; and deasphalting the residue from the first deasphalting step in a solvent capable of substantially extracting from the residue the donor solvent.

• Assignee: Foster Wheeler USA Corp., Livingston, NJ
• Patent Number(s): US 4663028
• OSTI ID: 6392941
• Resource Relation: Patent File Date: Filed date 28 Aug 1985
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL LIQUEFACTION
SOLVENTS
CHEMICAL PREPARATION
ASHES
BOILING POINTS
CARBON
COAL LIQUIDS
DEASPHALTING
DISTILLATION
HIGH TEMPERATURE
HYDROGEN
HYDROGEN TRANSFER
MOLECULAR WEIGHT
QUANTITY RATIO
RESIDUES
SOLVENT EXTRACTION
ELEMENTS
EXTRACTION
FLUIDS
LIQUEFACTION
LIQUIDS
NONMETALS
PHYSICAL PROPERTIES
SEPARATION PROCESSES
SYNTHESIS
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction