pech

Drucken

Coal Tar Pitch

liquid and solid

SPECIFICATION

 

Quality Index

Max

1.

Ash, %

0,13

2.

Softening point, (Mettler), °C

108,1

3.

Weight fraction of substances insoluble in toluene,%

34,0

4.

Weight fraction of substances insoluble in quinoline,%

12,0

5.

Coke residual, %

57,0

6.

Density, gr / cm3

1,320

7.

Weight fraction of sulphur, %

0,51

8.

Weight fraction of natrium, ppm

160

9.

Weight fraction of calcium, ppm

77


 

The index naming

Norm for the grade

Actually

KPI-1

KPI-2

KPI-3

1

Ash content, %, not more than

0.3

0.3

0.5

0.28

2

Mass fraction of sulphur, %, not more than

0.3

0.7

0.7

0.48

3

Mass fraction of moisture, %, not more than

3

3

3

5.2

4

Content of volatile matters, %, not more than

0.8

0.8

0.8

0.46

5

Mass fraction of sodium oxid, %, not more than

0.06

0.06

0.06

0.04

6

Specific electric resistance, Ohm * m, not more than

600 * 10 ~6

515 * 10 -6

7

Mass fraction of chunks in the size less than 25 mm, %, not more than

10

10

10

9.3

 

 

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