Compliance Standards:

ASTM D721, IP 158

Applications:

This test method covers the determination of oil in petroleum waxes having a congealing point of 30°C (86°F) or higher as determined in accordance with Test Method D938, and containing not more than 15 % of oil.

Summary of test method:

Oil content or solvent extractables in wax can affect key properties such as strength, hardness, melting point, etc. The sample is dissolved in methyl-ethyl ketone or a 50-50 mixture of methyl-ethyl ketone and toluene, cooled to precipitate the wax, and filtered. The oil content or solvent extractables content of the filtrate is then determined by evaporating the solvent and weighing the residue.

Details:

The complete apparatus consists of Filter Stick Assembly; Cooling Bath; Air Pressure Regulator; Wire stirrer, Weighing Bottles, Thermometer, Transfer pipet and Evaporation Cabinet.

1) Filter Stick and Assembly:

Filters petroleum wax samples per ASTM specifications. Consists of 10mm diameter sintered glass filter stick with air pressure inlet tube and delivery nozzle, and a 25x170mm test tube. Inserts in Cooling Bath.

2) Refrigerated Cooling Bath:

Accommodates three (3) 25x170mm test tubes for cooling samples and filter stick assemblies. Refrigerated (-30 C) Insulated stainless steel digital cooling tank with finished powder coating exterior. Removable composition top plate has thermometer port, filling port and three 25.4mm (1") test tube ports.

3) Air Pressure Regulator:

Controls air flow to the filter stick assembly at the required rate. Mercury bubbler-type, with 250mL glass cylinder, T-tube and rubber stopper.

4) Evaporation Cabinet:

Thermostatically heated cabinet evaporates solvent from filtrate per specifications. Accommodates four weighing bottles. Delivers air stream vertically downward into bottles through glass jets. Manifold assembly is adjustable for positioning of jets at the correct height above the sample surface. Controls temperature at 35 ±1°C (95 ±2°F). Finished steel cabinet with composition front plate and hinged glass door.

5) Thermometer:

• ASTM 71C / IP 72C
• –37°C to +21°C Temperature range

6) Wire stirrer:

A piece of stiff wire, made of iron, stainless steel, or Nichrome wire of about No. 20 B & S (0.9 mm in diameter) or 16 swg gage, 250 mm long. A 10-mm diameter loop is formed at each end, and the loop at the bottom end is bent so that the plane of the loop is perpendicular to the wire.

7) Transfer pipet:

Transfer Pipet, or equivalent volume dispensing device, capable of delivering 15 mL

8) Weighing Bottles:

•  Glass-stoppered, having a typical capacity of 15 to 25 mL
• Quantity : 04 Nos

9) Analytical Weighing Balance :

220 Gram capacity x 0.1 mg accuracy

Note

Required Reagents and Air supply to conduct the test as per ASTM D721 shall be arranged by the end user.