GB/T 2288-2008Coking products - Determination of moisture content (English PDF)

4.1 Principle

Anhydrous solvent, mixing the sample with a quantity of distilled water content was measured, and the mass fraction expressed.

4.2 Reagents

4.2.1 Toluene

anhydrous.

4.2.2 benzene

anhydrous.

4.3 Instrument

4.3.1 retort

hard refractory glass, flat or round bottom short neck, the volume of 500mL, the bottleneck has 24/29 standard ground.

4.3.2 cooling pipe

inner tube length of 300mm, 250mm outer tube length of straight cooling tube, the lower end having a diameter of 19/26 standard ground (Figure 1

Shown).

4.3.3 receiving pipe

a volume of 2mL, Subdivision of 0.05mL, maximum error 0.02mL, shown in Figure 2; volume of 10mL, points

Scale is 0.1mL, the maximum error is 0.06mL, as shown in Figure 3; volume of 25mL, sub-scale is 0.2mL, the maximum error

0.1mL, as shown in FIG. Each collection tube having an upper end 19/26 standard ground, and the lower end of the cooling pipe standard ground match, receiving manifold

The lower end having a diameter of 24/29 standard ground, with the standard retort grinding mouth to match.

4.3.4 scales

a sense of the amount of 0.2g.

4.3.5 cylinder

the volume of 50mL, 100mL.

4.3.6

or gas lamp with stepless electric stove.

4.4 Test procedure

4.4.1

Weigh the sample at room temperature uniformity 100g (weighing accuracy 0.2g) and the amount of toluene 50mL, in a clean, dry distillation flask, fine

Heart shake.

4.4.1.1

Determination of moisture when coal tar, solid coumarone, the ground sample weighed 100g less than 13mm, the amount of solvent to 100mL.

4.4.1.2

Determination of crude pyridine light when moisture in benzene as a solvent.