Modified coal tar pitch is remnant which extract light oil Phenol oil, naphthalene oil, wash oil and anthracene oil from coal tar by Distillation, adopting tube turnace continuous distillation method , it was Solid black type at normal atmospheric temperature, No fixed melting point, it softed then melting after heating
Parameter
|
NO
|
Item
|
First grade
|
Second grade
|
|
|
Softening point(ring ball method)℃
|
100-115
|
100-120
|
|
|
Toluene insolubles content % >
|
28-34
|
26-30
|
|
|
Quinoline insoluble content %
|
8-14
|
8-15
|
|
|
ß Resin content %
|
﹥18
|
﹥16
|
|
|
Coking value %
|
﹥54
|
﹥56
|
|
|
Ash content %
|
≤0.3
|
≤0.3
|
|
|
Water content %
|
≤5
|
≤5
|
|
|
Packing
|
40±0.5KG/bag(weave bag )
|
|