NB/SH/T 0509-2010 Test method for separation of asphalt into four fractions
1 Scope
1.1 This standard specifies the test method for separation of asphalt into four fractions (saturation fraction, aromatic fraction, gum, asphaltene).
1.2 This standard is applicable to petroleum asphalt, and may apply to residue oil for reference.
1.3 The use safety requirements are not covered in this standard; users of this standard are obliged to formulate proper safety application specifications prior to use.
2 Normative References
The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions, of any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
GB/T 514 Specification for liquid-in-glass thermometers for testing of petroleum products
GB/T 11147 Standard practice for sampling bituminous materials
SH/T 0652 Petroleum asphalt terminology
3 Method summary
The sample is precipitated with n-heptane to obtain asphaltene. After filtration, the inclusion of soluble fraction in the precipitation is removed by reflux with n-heptane, and then the precipitation is dissolved by reflux with toluene to obtain asphaltene. The part of deasphaltene is adsorbed on the alumina column, and then washed out with n-heptane (or petroleum ether), toluene, toluene-ethanol respectively to obtain saturation fraction, aromatic fraction, gum.
4 Apparatus, reagents and materials
4.1 Apparatus
4.1.1 Asphaltene tester: See Figure 1, including grinding triangle bottle, extractor and condenser.
4.1.2 Electric jacket.
4.1.3 Glass short-neck funnel: φ75mm to 90mm.
4.1.4 Funnel rack.
4.1.5 Glass adsorption column: See Figure 2. Jacket on the outside, hot water circulation insulation.
4.1.6 Thermostatic water bath.
4.1.7 Muffle furnace: 0°C to 800°C.
4.1.8 Vacuum oven: The temperature can be maintained at 105°C to 110°C, and the vacuum degree can be maintained at 93kPa ± 1kPa (700mmHg ± 10mmHg).
4.1.9 Grinding triangle bottle: #24 grinding, 150mL to 250mL.
4.1.10 Dryer with piston: volume 3000mL, no desiccant; volume 3000mL to 5000mL, with desiccant.
4.1.11 Analytical balance, with an accuracy of 0.0001g.
4.1.12 Measuring cylinder: 20mL, 50mL, 100mL.
4.2 Reagents and materials
Foreword II
1 Scope
2 Normative References
3 Method summary
4 Apparatus, reagents and materials
5 Test preparation
6 Test procedure
7 Calculation
8 Report
9 Precision
10 Keywords
