ASTM D2001-07(2012)
(Test Method)Standard Test Method for Depentanization of Gasoline and Naphthas
Standard Test Method for Depentanization of Gasoline and Naphthas
SIGNIFICANCE AND USE
4.1 The presence of pentane and lighter hydrocarbons in gasolines, naphthas, and similar petroleum distillates interferes in Test Method D2789. Pentane and lighter hydrocarbons are separated by this test method so that the depentanized residue can be analyzed and so the pentane and lighter hydrocarbons can be analyzed by other methods, if desired.
4.2 Under the conditions specified in the test method some C5 and lighter hydrocarbons remain in the bottoms, and some C6 and heavier hydrocarbons carry over to the overhead. Expressed as volume percent of charge, the amounts are typically 2 % or less, which is considered adequate for the purpose designated under Scope. It should be recognized, however, that when expressed as volume percent of overhead or of bottoms the percentages can be higher, making this test method unsuitable for any purposes not designated under Scope.
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 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 standard. The values given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, 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.
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Designation: D2001 − 07 (Reapproved 2012)
Standard Test Method for
Depentanization of Gasoline and Naphthas
This standard is issued under the fixed designation D2001; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope can be analyzed and so the pentane and lighter hydrocarbons
can be analyzed by other methods, if desired.
1.1 This test method covers the removal of pentanes and
lighter hydrocarbons from gasolines, naphthas, and similar 4.2 Under the conditions specified in the test method some
petroleum distillates to prepare samples suitable for the deter-
C and lighter hydrocarbons remain in the bottoms, and some
minationofhydrocarbontypesinaccordancewithTestMethod C and heavier hydrocarbons carry over to the overhead.
D2789. In addition, this test method determines the volume
Expressed as volume percent of charge, the amounts are
percent of bottoms remaining after depentanization. typically 2 % or less, which is considered adequate for the
purpose designated under Scope. It should be recognized,
1.2 The values stated in SI units are to be regarded as
however, that when expressed as volume percent of overhead
standard. The values given in parentheses are for information
or of bottoms the percentages can be higher, making this test
only.
method unsuitable for any purposes not designated under
1.3 This standard does not purport to address all of the
Scope.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Apparatus
priate safety and health practices and determine the applica-
5.1 Depentanization Apparatus, as shown in Fig. 1, consist-
bility of regulatory limitations prior to use.
ing of the following parts:
5.1.1 Distillation Column,
2. Referenced Documents
2 5.1.2 Reflux Condenser Head,
2.1 ASTM Standards:
5.1.3 Light-Ends Trap,
D1250 Guide for Use of the Petroleum Measurement Tables
5.1.4 Receiver, graduated, 12.5 mL, and
D2789 Test Method for Hydrocarbon Types in Low Olefinic
3,4
5.1.5 Thermometer, 10 to 79°C (50 to 175°F).
Gasoline by Mass Spectrometry
5.2 Column Packing—Two types are required:
4,5
3. Summary of Test Method
5.2.1 Heli-Pak Column Packing, 1.27 by 2.54 by 2.54
mm (Size B, 0.050 by 0.100 by 0.100 in.).
3.1 A 50-mL sample is distilled into an overhead (C and
4,5
5.2.2 Heli-Pak Column Packing, Size C, 4.4 by 4.4 m
lighter) fraction and a bottoms (C and heavier) fraction. The
(0.090 by 0.175 by 0.175 in.), or Cannon Protruded Metal
volume of bottoms is measured and the volume percent, based
4,6
Packing, 4.0 by 4.0 mm (0.16 by 0.16 in.).
on the charge, is calculated.
5.3 Distillation Flask, round-bottom, 100 mL, with
4. Significance and Use
⁄40 standard-taper female joint.
4.1 The presence of pentane and lighter hydrocarbons in
5.4 Distillation Flask Heating Mantle, Glas-Col, spherical,
gasolines, naphthas, and similar petroleum distillates interferes
for 100-mL flask.
in Test Method D2789. Pentane and lighter hydrocarbons are
separated by this test method so that the depentanized residue
The sole source of supply of the apparatus known to the committee at this time
is Thermometer No. ME510-1 available from Metro Scientific Inc., 11 Willow Park
This test method is under the jurisdiction of ASTM Committee D02 on Center, East Farmingdale, NY 11735.
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee If you are aware of alternative suppliers, please provide this information to
D02.04.0C on Liquid Chromatography. ASTM International Headquarters. Your comments will receive careful consider-
CurrenteditionapprovedJune1,2012.PublishedJuly2012.Originallyapproved ation at a meeting of the responsible technical committee, which you may attend.
in1962.LastpreviouseditionapprovedinD2001–07.DOI:10.1520/D2001-07R12. The sole source of supply of the apparatus known to the committee at this time
For referenced ASTM standards, visit the ASTM website, www.astm.org, or is Reliance Glass Works Inc., Gateway Rd., PO Box 825, Bensenville, IL 60106.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM The sole source of supply of the apparatus known to the committee at this time
Standards volume information, refer to the standard’s Document Summary page on is Cannon protruded metal packing available from Scientific Development Co., Box
the ASTM website. 795, State College, PA.
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D2001 − 07 (2012)
FIG. 1 Depentanization Apparatus
5.5 Variable Transformer, for regulating power to heating 6.4 Immerse the receiver in a Dewar flask containing a
mantle. mixture of solid carbon dioxide (Warning—Extremely cold.)
in a suitable liquid. 1,1,2 Trichloro Ethene is recommended.
5.6 Water Cooling Bath—If a supply of chilled water for the
(Warning—Health hazard.)
reflux condenser is not available, a satisfactory means for
supplying chilled water can be provided by circulating tap 6.5 Circulate water, chilled to a temperature between 4 and
water through coiled copper tubing immersed in an ice-water 10°C (40 and 50°F), through the reflux condenser.
bath.
7. Procedure
6. Preparation of Apparatus
7.1 Lubricate the joint at the bottom of the column with a
hydrocarbon-insolu
...
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