modified pitch technical indicator
| Technical items |
Firsts |
Seconds |
| Softening point(ring and ball method) ，℃ |
100～115 |
100～120 |
| Toluene insoluble matter ，% |
28～34 |
＞26 |
| Quinoline insoluble matter，% |
8～14 |
6～15 |
| β-resin % ≥ |
18 |
16 |
| Coking value，% ≥ |
54 |
50 |
| Ash，% ≤ |
0.3 |
0.3 |
| Moisture，% ≤ |
5 |
5 |
medium curing pitch technical indicator
| Technical items |
Firsts |
| Softening point (ring and ball method)，℃ |
85～95 |
| Toluene insoluble matter，% |
28～34 |
| Quinoline insoluble matter，% |
8～14 |
β-resin % ≥ |
18 |
| Coking value% ≥ |
54 |
| Ash% ≤ |
0.3 |
| Moisture % ≤ |
5 |
Industry's naphthalene technical indicator
Technical items |
High-class product |
Grade A |
Certified products |
| Appearance |
White, allowed to take a little red or a little
yellow powdery , flaky crystallization |
| Crystalline point ，℃≥ |
78.3 |
78.0 |
77.5 |
| Involatile matter ， ≤ |
0.04 |
0.06 |
0.08 |
| Ash，% ≤ |
0.01 |
0.01 |
0.02 |
|
