Medium temperature coal tar pitch adopt tube furnace using a continuous distillation process,medium coal tar pitch is the residue which extract fraction at 3600C, it was black solid at room temperature, No fixed melting point, it will softing then melt after heating , Contains oxygen, nitrogen, sulfur and other elements of heterocyclic compounds.
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NO
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Item
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First grade
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Second grade
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1
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Softing point(ring ball method)℃
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80-90
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75-95
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2
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Toluene insolubles content % >
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15-25
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≤25
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|
3
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Quinoline insoluble content %
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8-14
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8-15
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|
4
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ß Resin content%
|
——
|
——
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|
5
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Coking value %
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——
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——
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|
6
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Ash content %
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≤0.3
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≤0.5
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|
7
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Water content %
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≤5
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≤5
|
|
8
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Package
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40±0.5KG/bag(weave bag)
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|