ASTM D611-07
(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
SIGNIFICANCE AND USE
The aniline point (or mixed aniline point) is useful as an aid in the characterization of pure hydrocarbons and in the analysis of hydrocarbon mixtures. Aromatic hydrocarbons exhibit the lowest, and paraffins the highest values. Cycloparaffins and olefins exhibit values that lie between those for paraffins and aromatics. In homologous series the aniline points increase with increasing molecular weight. Although it occasionally is used in combination with other physical properties in correlative methods for hydrocarbon analysis, the aniline point is most often used to provide an estimate of the aromatic hydrocarbon content of mixtures.
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.
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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Designation: D611 − 07
Designation:2/98
Standard Test Methods for
Aniline Point and Mixed Aniline Point of Petroleum Products
1
and Hydrocarbon Solvents
This standard is issued under the fixed designation D611; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* D1500 Test Method forASTM Color of Petroleum Products
(ASTM Color Scale)
1.1 These test methods cover the determination of the
E1 Specification for ASTM 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
aniline point is below the bubble point and above the solidifi-
3.1 Definitions:
cation point of the aniline-sample mixture. Test Method B, a
3.1.1 aniline point—the minimum equilibrium solution tem-
thin-film method, is suitable for samples too dark for testing by
perature for equal volumes of aniline and sample.
TestMethodA.TestMethodsCandDareforsamplesthatmay
vaporize appreciably at the aniline point. Test Method D is 3.1.2 mixed aniline point—the minimum equilibrium solu-
particularly suitable where only small quantities of sample are tion temperature of a mixture of two volumes of aniline, one
available. Test Method E describes a procedure using an
volume of sample, and one volume of n-heptane of specified
automatic apparatus suitable for the range covered by Test
purity.
Methods A and B.
4. Summary of Test Method
1.2 These test methods also cover the determination of the
mixed aniline point of petroleum products and hydrocarbon
4.1 Specified volumes of aniline and sample, or aniline and
solvents having aniline points below the temperature at which
sample plus n-heptane, are placed in a tube and mixed
aniline will crystallize from the aniline-sample mixture.
mechanically. The mixture is heated at a controlled rate until
1.3 This standard does not purport to address all of the
the two phases become miscible. The mixture is then cooled at
safety concerns, if any, associated with its use. It is the
a controlled rate and the temperature at which two phases
responsibility of the user of this standard to establish appro-
separate is recorded as the aniline point or mixed aniline point.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. Specific warning
5. Significance and Use
statements are given in Section 7.
5.1 The aniline point (or mixed aniline point) is useful as an
2. Referenced Documents
aid in the characterization of pure hydrocarbons and in the
2
2.1 ASTM Standards: analysis of hydrocarbon mixtures. Aromatic hydrocarbons
exhibit the lowest, and paraffins the highest values. Cyclopar-
1 affins and olefins exhibit values that lie between those for
These test methods are under the jurisdiction of ASTM Committee D02 on
PetroleumProductsandLubricantsandarethedirectresponsibilityofD02.04.0Don paraffins and aromatics. In homologous series the aniline
Physical and Chemical Methods.
points increase with increasing molecular weight. Although it
Current edition approved Nov. 1, 2007. Published November 2007. Originally
occasionally is used in combination with other physical prop-
approved in 1941. Last previous edition approved in 2004 as D611–04.
These test methods were adopted as a joint ASTM-IP standard in 1964. DOI: erties in correlative methods for hydrocarbon analysis, the
10.1520/D0611-07.
aniline point is most often used to provide an estimate of the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
aromatic hydrocarbon content of mixtures.
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
1
---------------------- Page: 1 ----------------------
D611 − 07
NOTE 3—It is estimated that approximately 400 to 1400 ppm of water
6. Apparatus
in aniline is required to meet the heptane specification.
6.1 For details of the aniline point apparatus required for
NOTE 4—As an alternative to distilling the aniline on the day of use, the
each method see:
aniline may be distilled as described in 7.1, collecting the distillate in
ampoules,sealingtheampoulesundervacuumordrynitrogen,andstoring
Annex A1 for Test Method A
in a co
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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.
An American National Standard
Designation:D611–04 Designation: D 611 – 07
Designation: 2/98
Standard Test Methods for
Aniline Point and Mixed Aniline Point of Petroleum Products
1
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*
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 MethodA. 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D 1500 Test Method for ASTM Color of Petroleum Products (ASTM Color Scale)
E 1 Specification for ASTM Liquid-in-Glass Thermometers
3. Terminology
3.1 Definitions:
3.1.1 aniline point—the minimum equilibrium solution temperature for equal volumes of aniline and sample.
3.1.2 mixed aniline point—the minimum equilibrium solution temperature of a mixture of two volumes of aniline, one volume
of sample, and one volume of n-heptane of specified purity.
4. Summary of Test Method
4.1 Specifiedvolumesofanilineandsample,oranilineandsampleplus n-heptane,areplacedinatubeandmixedmechanically.
The mixture is heated at a controlled rate until the two phases become miscible. The mixture is then cooled at a controlled rate
and the temperature at which two phases separate is recorded as the aniline point or mixed aniline point.
5. Significance and Use
5.1 The aniline point (or mixed aniline point) is useful as an aid in the characterization of pure hydrocarbons and in the analysis
of hydrocarbon mixtures. Aromatic hydrocarbons exhibit the lowest, and paraffins the highest values. Cycloparaffins and olefins
exhibit values that lie between those for paraffins and aromatics. In homologous series the aniline points increase with increasing
1
These test methods are under the jurisdiction of ASTM Committee D02 on Petroleum Products and Lubricants and are the direct responsibility of D02.04.0D on
Hydrocarbon Analysis. Physical and Chemical Methods.
Current edition approved MayNov. 1, 2004.2007. Published June 2004.November 2007. Originally approved in 1941. Last previous edition approved in 20012004 as
D611–01b. D 611–04.
These test methods were adopted as a joint ASTM-IP standard in 1964.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
1
---------------------- Page: 1 ----------------------
D611–07
molecular weight. Although it occasionally is used in combination with other physical properties in correlative methods for
hydrocarbon analysis, the aniline point is most often used to provide an estimate of the aromatic hydrocarbon content of mixtures.
6. Apparatus
6.1 For details of the aniline point apparatus required for each method see:
Annex A1 for Test
...
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