ASTM D2001-92(1997)

Standard Test Method for Depentanization of Gasoline and Naphthas

SCOPE
1.1 This test method covers the removal of pentanes and lighter hydrocarbons from gasolines, naphthas, and similar petroleum distillates to prepare samples suitable for the determination of hydrocarbon types in accordance with Test Method D1319 or Test Method D2789. In addition, this test method determines the volume percent of bottoms remaining after depentanization.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.  
1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.>

General Information

• Status: Historical
• Publication Date: 31-Dec-1996
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.04.0C - Liquid Chromatography

Relations

• Replaced By: ASTM D2001-92(2002) - Standard Test Method for Depentanization of Gasoline and Naphthas
• Effective Date: 15-Mar-1992

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact
ASTM International (www.astm.org) for the latest information.
Designation: D 2001 – 92 (Reapproved 1997) An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Depentanization of Gasoline and Naphthas
This standard is issued under the fixed designation D 2001; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4.2 Under the conditions specified in the test method some
C and lighter hydrocarbons remain in the bottoms, and some
1.1 This test method covers the removal of pentanes and
C and heavier hydrocarbons carry over to the overhead.
lighter hydrocarbons from gasolines, naphthas, and similar
Expressed as volume percent of charge, the amounts are
petroleum distillates to prepare samples suitable for the deter-
typically 2 % or less, which is considered adequate for the
mination of hydrocarbon types in accordance with Test Method
purpose designated under Scope. It should be recognized,
D 1319 or Test Method D 2789. In addition, this test method
however, that when expressed as volume percent of overhead
determines the volume percent of bottoms remaining after
or of bottoms the percentages can be higher, making this test
depentanization.
method unsuitable for any purposes not designated under
1.2 The values stated in SI units are to be regarded as the
Scope.
standard. The values given in parentheses are provided for
information purposes only.
5. Apparatus
1.3 This standard does not purport to address all of the
5.1 Depentanization Apparatus, as shown in Fig. 1, consist-
safety concerns, if any, associated with its use. It is the
ing of the following parts:
responsibility of the user of this standard to establish appro-
5.1.1 Distillation Column,
priate safety and health practices and determine the applica-
5.1.2 Reflux Condenser Head,
bility of regulatory limitations prior to use.
5.1.3 Light-Ends Trap,
2. Referenced Documents 5.1.4 Receiver, graduated, 12.5 mL, and
5.1.5 Thermometer, 10 to 79°C (50 to 175°F).
2.1 ASTM Standards:
2 5.2 Column Packing—Two types are required:
D 1250 Guide for Petroleum Measurement Tables
5.2.1 Heli-Pak Column Packing, 1.27 by 2.54 by 2.54 mm
D 1319 Test Method for Hydrocarbon Types in Liquid
2 (Size B, 0.050 by 0.100 by 0.100 in.).
Petroleum Products by Fluorescent Indicator Adsorption
5.2.2 Heli-Pak Column Packing, Size C, 4.4 by 4.4 m
D 2789 Test Method for Hydrocarbon Types in Low-
3 (0.090 by 0.175 by 0.175 in.), or Cannon Protruded Metal
Olefinic Gasoline by Mass Spectrometry
Packing, 4.0 by 4.0 mm (0.16 by 0.16 in.).
3. Summary of Test Method
5.3 Distillation Flask, round-bottom, 100 mL, with
⁄40 standard-taper female joint.
3.1 A 50-mL sample is distilled into an overhead (C and
5.4 Distillation Flask Heating Mantle, Glas-Col, spherical,
lighter) fraction and a bottoms (C and heavier) fraction. The
for 100-mL flask.
volume of bottoms is measured and the volume percent, based
5.5 Variable Transformer, for regulating power to heating
on the charge, is calculated.
mantle.
4. Significance and Use
5.6 Water Cooling Bath—If a supply of chilled water for the
4.1 The presence of pentane and lighter hydrocarbons in reflux condenser is not available, a satisfactory means for
gasolines, naphthas, and similar petroleum distillates interferes
supplying chilled water can be provided by circulating tap
in Test Method D 1319 and Test Method D 2789. Pentane and water through coiled copper tubing immersed in an ice-water
lighter hydrocarbons are separated by this test method so that
bath.
the depentanized residue can be analyzed and so the pentane
6. Preparation of Apparatus
and lighter hydrocarbons can be analyzed by other methods, if
6.1 Fill the fractionating column with packing as follows:
desired.
Place about 25 mm (1 in.) of the Heli-Pak column packing, size
This test method is under the jurisdiction of ASTM Committee D-2 on
Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee Thermometer No. ME510-1 available from Metro Scientific Inc., 11 Willow
D02.04on Hydrocarbon Analysis. Park Center, East Farmingdale, NY 11735.
Current edition approved March 15, 1992. Published May 1992. Originally Available from Reliance Glass Works Inc., Gateway Rd., PO Box 825,
published as D 2001 – 62 T. Last previous edition D2001 – 91. Bensenville, IL 60106.
2 6
Annual Book of ASTM Standards, Vol 05.01. Cannon protruded metal packing available from Scientific Development Co.,
Annual Book of ASTM Standards, Vol 05.02. Box 795, State College, PA.
NOTICE:¬This¬standard¬has¬either¬been¬superceded¬and¬replaced¬by¬a¬new¬version¬or¬discontinued.¬
Contact¬ASTM¬International¬(www.astm.org)¬for¬the¬latest¬information.¬
D 2001
FIG. 1 Depentanization Apparatus
C or the Cannon packing on the indentations at the bottom of 7.2 Connect the mantle, through the variable transformer, to
the column. This packing assures ample free space to prevent the power supply.
flooding at the bottom of the column. Fill the colu
...