ASTM D1015-05
(Test Method)Standard Test Method for Freezing Points of High-Purity Hydrocarbons
Standard Test Method for Freezing Points of High-Purity Hydrocarbons
SIGNIFICANCE AND USE
The freezing point measured by this test method, when used in conjunction with the physical constants for the hydrocarbons listed in Test Method D 1016, allows the determination of the purity of the material under test. A knowledge of the purity of these hydrocarbons is often needed to help control their manufacture and to determine their suitability for use as reagent chemicals or for conversion to other chemical intermediates or finished products.
SCOPE
1.1 This test method covers a procedure for the precise measurement of the freezing points of high-purity hydrocarbons.
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
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. For specific hazard statements, see 5.1, 6.1 and 6.2 . Note 1
For the calculation of the molal purity of essentially pure compounds from measured freezing points and for procedures to be used for the sampling and determination of purity of certain specific compounds, see Test Method D 1016.
General Information
Relations
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D1015–05
Standard Test Method for
1
Freezing Points of High-Purity Hydrocarbons
This standard is issued under the fixed designation D1015; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 4. Significance and Use
1.1 This test method covers a procedure for the precise 4.1 The freezing point measured by this test method, when
measurement of the freezing points of high-purity hydrocar- used in conjunction with the physical constants for the hydro-
bons. carbonslistedinTestMethodD1016,allowsthedetermination
1.2 The values stated in SI units are to be regarded as the of the purity of the material under test. A knowledge of the
standard. The values in parentheses are for information only. purity of these hydrocarbons is often needed to help control
1.3 This standard does not purport to address all of the their manufacture and to determine their suitability for use as
safety concerns, if any, associated with its use. It is the reagent chemicals or for conversion to other chemical inter-
responsibility of the user of this standard to establish appro- mediates or finished products.
priate safety and health practices and determine the applica-
5. Apparatus
bility of regulatory limitations prior to use. For specific hazard
,
45
statements, see 5.1, 6.1 and 6.2. 5.1 Freezing-Point Apparatus, as shown in Figs. 1-3
comprising a freezing tube, a metal sheath for the freezing
NOTE 1—For the calculation of the molal purity of essentially pure
tube, a Dewar flask for the cooling bath, a Dewar flask for the
compounds from measured freezing points and for procedures to be used
warming bath, a stirring mechanism, suitable clamps and
for the sampling and determination of purity of certain specific com-
holders for the parts, and the absorption tubes.The outer walls
pounds, see Test Method D1016.
of all Dewar flasks can be covered with adhesive tape to
2. Referenced Documents
minimize danger from glass in case of breakage. (Warning—
2
2.1 ASTM Standards: Whenusingliquidnitrogenasarefrigerant,provideameansto
D1016 TestMethodforPurityofHydrocarbonsfromFreez- prevent condensation of oxygen in the space between the
ing Points freezing tube and the metal sheath and subsequent sealing of
D1265 Practice for Sampling Liquefied Petroleum (LP) the space by ice forming on the ceramic (or glass) fiber collar.
Gases, Manual Method Provide the metal sheath with suitable openings in the sides
D4057 Practice for Manual Sampling of Petroleum and and bottom. Failure to do this may result in breakage of the
Petroleum Products freezing tube when the liquefied oxygen evaporates within the
sealed space.)
3. Summary of Test Method
3.1 The precise experimental measurement of the freezing
point is made from interpretation of time-temperature freezing
3
or melting curves.
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.04 on Hydrocarbon Analysis.
Current edition approved Nov. 1, 2005. Published November 2005. Originally
approved in 1949. Last previous edition approved in 2004 as D1015–99(2004).
DOI: 10.1520/D1015-05.
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
4
the ASTM website. The sole source of supply of the apparatus known to the committee at this time
3
For details not given here, see Glasgow, A. R., Jr., Rossini, F. D., and Streiff, is Reliance Glass Works, Inc., Bensenville, IL.
5
A. J., “Determination of the Purity of Hydrocarbons by Measurement of Freezing If you are aware of alternative suppliers, please provide this information to
Points,” Journal of Research, JNBAA, National Institute of Standards and Tech- ASTM International Headquarters. Your comments will receive careful consider-
1
nology, Vol 35, No. 6, 1945, p. 355. ation at a meeting of the responsible technical committee, which you may attend.
*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 ----------------------
D1015–05
A—Bracket for motor, with rubber pad. Q—Ceramic (or glass) fiber collar.
1 1
B—Motor, with reduction gears, to give 120 r/min. R—Brass cylinder, 317.5 mm (12 ⁄2 in.) in length and 54 mm (2 ⁄8 in.) in inside diameter,
with bakelite collar; when liquid nitrogen is used, the metal shield must be
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.