Low solids content, coal tar based impregnating pitch

Patent · Tue May 12 04:00:00 EDT 1987

OSTI ID:6439873

Chu, A S; Bart, E F; Cook, G R; Horbachewski, D M

A method is described of obtaining a coal tar based impregnant pitch characterized by having a sulfur content of less than 0.5 weight percent and a quinoline insoluble, QI, content of less than about 0.5 percent and enhanced impregnation property. This method comprises: selecting coal tar oil feedstock having: (1) a distillation residue at 355/sup 0/C > 30 weight percent; and (2) a QI < 0.5 weight percent; heating the feedstock to a temperature of between about 150/sup 0/C and 390/sup 0/C; and oxidizing and stripping the feedstock until: an ASTM D-3104-77 softening point between about 90/sup 0/C and 150/sup 0/C; a coking value of at least 45 weight percent according to ASTM D-2416-73; and a flashpoint of at least 200/sup 0/C according to ASTM D92-72 are obtained.

• Assignee: Allied Corporation, Morris Township, Morris County, NJ
• Patent Number(s): US 4664774
• OSTI ID: 6439873
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010500* -- Coal
Lignite
&amp; Peat-- Products &amp; By-Products
AROMATICS
AZAARENES
AZINES
CARBONIZATION
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COAL TAR
COKING
COMBUSTION PROPERTIES
DECOMPOSITION
DISTILLATION
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
IMPREGNATION
MEDIUM TEMPERATURE
MELTING POINTS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDATION
PHYSICAL PROPERTIES
PITCHES
PYRIDINES
QUANTITY RATIO
QUINOLINES
RESIDUES
SEPARATION PROCESSES
SULFUR CONTENT
SYNTHESIS
TAR
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE