ASTM D721-05
(Test Method)Standard Test Method for Oil Content of Petroleum Waxes
Standard Test Method for Oil Content of Petroleum Waxes
SCOPE
1.1 This test method covers the determination of oil in petroleum waxes having a congealing point of 30°C (86°F) or higher as determined in accordance with Test Method D 938, and containing not more than 15 % of oil.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are for information only.
Note 1—With some types of waxes, of oil contents greater than 5%, there may be an incompatibility with MEK resulting in the formation of two liquid phases. If this occurs, the method is not applicable to the material under test.
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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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
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An American National Standard
Designation:D721–05
Designation: 158/69(85)
Standard Test Method for
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Oil Content of Petroleum Waxes
This standard is issued under the fixed designation D 721; 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* 2.2 Energy Institute Standards:
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Specification for IP Standard Thermometers
1.1 This test method covers the determination of oil in
petroleum waxes having a congealing point of 30°C (86°F) or
3. Summary of Test Method
higher as determined in accordance with Test Method D 938,
2 3.1 The sample is dissolved in methyl ethyl ketone, the
and containing not more than 15 % of oil.
solution cooled to –32°C (–25°F) to precipitate the wax, and
1.2 The values stated in inch-pound units are to be regarded
filtered. The oil content of the filtrate is determined by
as the standard. The values in parentheses are for information
evaporating the methyl ethyl ketone and weighing the residue.
only.
4. Significance and Use
NOTE 1—With some types of waxes, of oil contents greater than 5%,
there may be an incompatibility with MEK resulting in the formation of
4.1 The oil content of a wax may have significant effects on
two liquid phases. If this occurs, the method is not applicable to the
several of its properties, such as strength, hardness, flexibility,
material under test.
scuffresistance,coefficientoffriction,coefficientofexpansion,
1.3 This standard does not purport to address all of the
meltingpoint,andoilstraining.Theimportanceoftheseeffects
safety concerns, if any, associated with its use. It is the
may be dependent upon the ultimate use of the wax.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 5. Apparatus
bility of regulatory limitations prior to use.
5.1 Filter Stick and Assembly, consisting of a 10-mm
diameter sintered glass filter stick of 10 to 15 µm maximum
2. Referenced Documents
pore diameter as determined by the method in Appendix X1,
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2.1 ASTM Standards:
provided with an air pressure inlet tube and delivery nozzle. It
D 938 Test Method for Congealing Point of Petroleum
is provided with a ground-glass joint to fit a 25 by 170-mm test
Waxes, Including Petrolatum
tube. The dimensions for a suitable filtration assembly are
E1 Specification forASTM Liquid-in-Glass Thermometers
shown in Fig. 1.
E 128 Test Method for Maximum Pore Diameter and Per-
NOTE 2—A metallic filter stick may be employed if desired. A filter
meability of Rigid Porous Filters for Laboratory Use
1
stick made of stainless steel and having a 12.7–mm ( ⁄2-in.) disk of 10 to
15-µm maximum pore diameter, as determined byTest Method E 128, has
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been found to be satisfactory. The metallic apparatus is inserted into a 25
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This test method is under the jurisdiction of ASTM Committee D02 on
by 150–mm test tube and held in place by means of a cork.
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
5.2 Cooling Bath, consisting of an insulated box with 30 6
D02.10 on Properties of Petroleum Wax.
Current edition approved Nov. 1, 2005. Published November 2005. Originally
5-mm (1.2 6 0.2-in.) holes in the center to accommodate any
approved in 1943. Last previous edition approved in 2004 as D 721-04.
desired number of test tubes. The bath may be filled with a
In the IP, this test method is under the jurisdiction of the Standardization
Committee. This test method was issued as a joint ASTM-IP tentative in 1964.
This test method was prepared jointly by the Technical Association of Pulp and
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Paper Industry and ASTM International. Available from Energy Institute, 61 New Cavendish St., London, WIG 7AR,
This test method has been adopted for use by government agencies to replace U.K.
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Method 5431 of Federal Test Method Standard No. 79lb. The sole source of supply of a suitable metal filter stick with designated
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This test method is being used by some laboratories for products of higher oil porosity G known to the committee at this time is the Pall Trinity Micro Corp.,
content. Route281,Cortland,NY13045.AlistofUnitedKingdomsupplierscanbeobtained
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or from Energy Institute, 61 New Cavendish St., London, W1G 7AR, United King-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM dom. If you are aware of alternative suppliers, please provide this information to
Standards volume information, refer to the standard’s Document Summary page on ASTM In
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