ASTM D2712-18a

Standard Test Method for Determination of Hydrocarbon Impurities in High Purity Propylene by Gas Chromatography

SIGNIFICANCE AND USE
5.1 High-purity propylene is required as a feedstock for various manufacturing processes, and the presence of trace amounts of certain hydrocarbon impurities may have adverse effects on yield or catalyst life. This test method is suitable for use as a benchmark in setting commercial specifications, for use as an internal quality control tool, and for use in development or research work.
SCOPE
1.1 This test method is used for the determination of hydrocarbon impurities in propylene (propene) material of 97 % by mass or greater purity (concentrates). These impurities are determined in the concentration range of 0.35 mg/kg to 8575 mg/kg and includes the following components: methane, ethane, ethylene, propane, acetylene, isobutane, propadiene, normal butane, trans-2-butene, butene-1, isobutylene, cis-2-butene, isopentane, methylacetylene, normal pentane, and 1,3-butadiene.
Note 1: Optionally, the analysis may include the determination of pentenes/hexanes and heavier components, see 6.3.  
1.2 This test method does not determine non-hydrocarbon impurities, and additional tests may be necessary to fully characterize the propylene sample. However, for the purposes of this test, the purity of propylene is determined as the difference between the total of the determined analytes and 100 % (by difference).  
1.3 When this test method is being used for the determination of trace level impurities in high-purity propylene, the use of this test method for the analysis of propylene samples at lower purities is not recommended due to the potential for cross contamination between samples.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 This standard may involve hazardous materials, operations, and equipment. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 31-May-2018
• ICS: 71.080.10 - Aliphatic hydrocarbons
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.D0 - Hydrocarbons for Chemical and Special Uses

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: D2712 − 18a
Standard Test Method for
Determination of Hydrocarbon Impurities in High Purity
1
Propylene by Gas Chromatography
This standard is issued under the fixed designation D2712; 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* ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1.1 This test method is used for the determination of
mendations issued by the World Trade Organization Technical
hydrocarbon impurities in propylene (propene) material of
Barriers to Trade (TBT) Committee.
97 %bymassorgreaterpurity(concentrates).Theseimpurities
are determined in the concentration range of 0.35 mg⁄kg to
2. Referenced Documents
8575 mg/kg and includes the following components: methane,
2
2.1 ASTM Standards:
ethane, ethylene, propane, acetylene, isobutane, propadiene,
D1265 Practice for Sampling Liquefied Petroleum (LP)
normal butane, trans-2-butene, butene-1, isobutylene, cis-2-
Gases, Manual Method
butene, isopentane, methylacetylene, normal pentane, and
D3700 Practice for Obtaining LPG Samples Using a Float-
1,3-butadiene.
ing Piston Cylinder
NOTE 1—Optionally, the analysis may include the determination of
F307 Practice for Sampling Pressurized Gas for Gas Analy-
pentenes/hexanes and heavier components, see 6.3.
sis
1.2 This test method does not determine non-hydrocarbon
impurities, and additional tests may be necessary to fully
3. Terminology
characterize the propylene sample. However, for the purposes
3.1 Definitions:
of this test, the purity of propylene is determined as the
3.1.1 liquefied petroleum gas (LPG)—hydrocarbon gases
difference between the total of the determined analytes and
that can be stored or handled in the liquid phase under
100 % (by difference).
moderate conditions of pressure and at ambient temperature;
1.3 When this test method is being used for the determina-
they consist essentially of C and C alkanes and alkenes, or
3 4
tion of trace level impurities in high-purity propylene, the use
mixtures of these, and contain generally less than 0.5 % by
of this test method for the analysis of propylene samples at
liquid volume of material of higher carbon number, and have a
lower purities is not recommended due to the potential for
vapor pressure not exceeding 2000 kPa at 40 °C.
cross contamination between samples.
3.1.2 propylene concentrate—material-containing propyl-
1.4 The values stated in SI units are to be regarded as
ene at or above concentrations of 97 % by mass.
standard. No other units of measurement are included in this
4. Summary of Test Method
standard.
1.5 This standard may involve hazardous materials, 4.1 An LPG phase sample is analyzed as received via either
operations, and equipment. This standard does not purport to gas or liquid sampling valves into a gas chromatograph. The
address all of the safety concerns, if any, associated with its gas chromatograph is provided with a liquid sampling valve
use. It is the responsibility of the user of this standard to and optionally with a 6-port gas sampling valve and/or a 6-port
establish appropriate safety, health, and environmental prac- switching valve. If the user chooses to use a 6-port switching
valve to provide an initial composite backflush of C olefins
tices and determine the applicability of regulatory limitations
5
prior to use. and C + components, a small length of pre-column should be
6
used to provide separation of the components of interest, as
1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard- listed in 1.1, and the heavier components.This pre-column will
separate the heaviest components from the remainder of the
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
2
Subcommittee D02.D0 on Hydrocarbons for Chemical and Special Uses. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
CurrenteditionapprovedJune1,2018.PublishedJuly2018.Originallyapproved contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
in 1968. Last previous edition approved in 2018 as D2712 – 18. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
D2712-18A. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D2712 − 18 D2712 − 18a
Standard Test Method for
Determination of Hydrocarbon Impurities in High Purity
1
Propylene by Gas Chromatography
This standard is issued under the fixed designation D2712; 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.
NOTE—Previously balloted and approved material was included and the year date changed on January 19, 2018.
1. Scope*
1.1 This test method is used for the determination of hydrocarbon impurities in propylene (propene) material of 97 % by mass
or greater purity (concentrates). These impurities are determined in the concentration range of 0.35 mg ⁄kg to 8575 mg/kg and
includes the following components: methane, ethane, ethylene, propane, acetylene, isobutane, propadiene, normal butane,
trans-2-butene, butene-1, isobutylene, cis-2-butene, isopentane, methylacetylene, normal pentane, and 1,3-butadiene.
NOTE 1—Optionally, the analysis may include the determination of pentenes/hexanes and heavier components, see 6.3.
1.2 This test method does not determine non-hydrocarbon impurities, and additional tests may be necessary to fully characterize
the propylene sample. However, for the purposes of this test, the purity of propylene is determined as the difference between the
total of the determined analytes and 100 % (by difference).
1.3 When this test method is being used for the determination of trace level impurities in high-purity propylene, the use of this
test method for the analysis of propylene samples at lower purities is not recommended due to the potential for cross contamination
between samples.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This standard may involve hazardous materials, operations, and equipment. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D1265 Practice for Sampling Liquefied Petroleum (LP) Gases, Manual Method
D3700 Practice for Obtaining LPG Samples Using a Floating Piston Cylinder
F307 Practice for Sampling Pressurized Gas for Gas Analysis
3. Terminology
3.1 Definitions:
3.1.1 liquefied petroleum gas (LPG)—hydrocarbon gases that can be stored or handled in the liquid phase under moderate
conditions of pressure and at ambient temperature; they consist essentially of C and C alkanes and alkenes, or mixtures of these,
3 4
and contain generally less than 0.5 % by liquid volume of material of higher carbon number, and have a vapor pressure not
exceeding 2000 kPa at 40 °C.
3.1.2 propylene concentrate—material-containing propylene at or above concentrations of 97 % by mass.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.D0.03 on Propylene.
Current edition approved Jan. 19, 2018June 1, 2018. Published January 2018July 2018. Originally approved in 1968. Last previous edition approved in 20172018 as D2712
ɛ1
– 1718. . DOI: 10.1520/D2712-18.10.1520/D2712-18A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D2712 − 18a
4. Summary of Test Method
4.1 An LPG phase sample is analyzed as received via either gas or liquid sampling valves into a gas chromatograph. The gas
chromatograph is provided with a liquid sampling valve
...