ASTM D611-04
(Test Method)Standard Test Methods for Aniline Point and Mixed Aniline Point of Petroleum Products and Hydrocarbon Solvents
Standard Test Methods for Aniline Point and Mixed Aniline Point of Petroleum Products and Hydrocarbon Solvents
SCOPE
1.1 These test methods cover the determination of the aniline point of petroleum products and hydrocarbon solvents. Test Method A is suitable for transparent samples with an initial boiling point above room temperature and where the aniline point is below the bubble point and above the solidification point of the aniline-sample mixture. Test Method B, a thin-film method, is suitable for samples too dark for testing by Test Method A. Test Methods C and D are for samples that may vaporize appreciably at the aniline point. Test Method D is particularly suitable where only small quantities of sample are available. Test Method E describes a procedure using an automatic apparatus suitable for the range covered by Test Methods A and B.
1.2 These test methods also cover the determination of the mixed aniline point of petroleum products and hydrocarbon solvents having aniline points below the temperature at which aniline will crystallize from the aniline-sample mixture.
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.Specific warning statements are given in Section 7.
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An American National Standard
Designation:D611–04
Designation: 2/98
Standard Test Methods for
Aniline Point and Mixed Aniline Point of Petroleum Products
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and Hydrocarbon Solvents
This standard is issued under the fixed designation D 611; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* D 1500 Test Method for ASTM Color of Petroleum Prod-
ucts (ASTM Color Scale)
1.1 These test methods cover the determination of the
E 1 Specification forASTM Liquid-in-Glass Thermometers
aniline point of petroleum products and hydrocarbon solvents.
Test Method A is suitable for transparent samples with an
3. Terminology
initial boiling point above room temperature and where the
3.1 Definitions:
aniline point is below the bubble point and above the solidifi-
3.1.1 aniline point—the minimum equilibrium solution
cation point of the aniline-sample mixture. Test Method B, a
temperature for equal volumes of aniline and sample.
thin-film method, is suitable for samples too dark for testing by
3.1.2 mixed aniline point—the minimum equilibrium solu-
TestMethodA.TestMethodsCandDareforsamplesthatmay
tion temperature of a mixture of two volumes of aniline, one
vaporize appreciably at the aniline point. Test Method D is
volume of sample, and one volume of n-heptane of specified
particularly suitable where only small quantities of sample are
purity.
available. Test Method E describes a procedure using an
automatic apparatus suitable for the range covered by Test
4. Summary of Test Method
Methods A and B.
4.1 Specified volumes of aniline and sample, or aniline and
1.2 These test methods also cover the determination of the
sample plus n-heptane, are placed in a tube and mixed
mixed aniline point of petroleum products and hydrocarbon
mechanically. The mixture is heated at a controlled rate until
solvents having aniline points below the temperature at which
the two phases become miscible. The mixture is then cooled at
aniline will crystallize from the aniline-sample mixture.
a controlled rate and the temperature at which two phases
1.3 This standard does not purport to address all of the
separate is recorded as the aniline point or mixed aniline point.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety and health practices and determine the applica-
5.1 The aniline point (or mixed aniline point) is useful as an
bility of regulatory limitations prior to use. Specific warning
aid in the characterization of pure hydrocarbons and in the
statements are given in Section 7.
analysis of hydrocarbon mixtures. Aromatic hydrocarbons
exhibit the lowest, and paraffins the highest values. Cyclopar-
2. Referenced Documents
2 affins and olefins exhibit values that lie between those for
2.1 ASTM Standards:
paraffins and aromatics. In homologous series the aniline
points increase with increasing molecular weight. Although it
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occasionally is used in combination with other physical prop-
These test methods are under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and are the direct responsibility of D02.04 on
erties in correlative methods for hydrocarbon analysis, the
Hydrocarbon Analysis.
aniline point is most often used to provide an estimate of the
Current edition approved May 1, 2004. Published June 2004. Originally
aromatic hydrocarbon content of mixtures.
approved in 1941. Last previous edition approved in 2001 as D 611–01b.
These test methods were adopted as a joint ASTM-IP standard in 1964.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. 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.
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D611–04
in a cool dark place for future use. Alternatively, distillate may be stored
6. Apparatus
under dry nitrogen in a glass bottle or in single use ampules kept in a cool,
6.1 For details of the aniline point apparatus required for
dark place. In either case, rigid precaution must be taken to avoid
each method see:
contamination from atmospheric moisture (Note 2). It is believed that
Annex A1 for Test Method A under these conditions the aniline will remain
...
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